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Cheap Flights to Denver

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals to Denver

Thu, 22 Oct - Tue, 10 Nov
Multiple Airlines Logo
14:15 - 09:10SYD  Sydney Kingsford Smith-DEN Denver Intl
35h 55m3 stops Nadi Los Angeles Phoenix Sky Harbor Intl
Multiple Airlines Logo
13:10 - 12:35DEN  Denver Intl-SYD Sydney Kingsford Smith
29h 25m2 stops Los Angeles Nadi
$1,180Multiple Airlines
Tue, 20 Oct - Tue, 10 Nov
Multiple Airlines Logo
14:15 - 17:34SYD  Sydney Kingsford Smith-DEN Denver Intl
44h 19m2 stops Nadi Los Angeles
Multiple Airlines Logo
13:10 - 06:25DEN  Denver Intl-SYD Sydney Kingsford Smith
23h 15m1 stop Los Angeles
$1,187Multiple Airlines
Sun, 31 Jan - Mon, 15 Feb
Air Canada Logo
15:00 - 12:38SYD  Sydney Kingsford Smith-DEN Denver Intl
39h 38m2 stops Brisbane Vancouver Intl
Air Canada Logo
19:00 - 09:35DEN  Denver Intl-SYD Sydney Kingsford Smith
20h 35m1 stop Vancouver Intl
$1,211Air Canada
Mon, 9 Nov - Sun, 29 Nov
Air Canada Logo
11:20 - 12:43SYD  Sydney Kingsford Smith-DEN Denver Intl
19h 23m1 stop Vancouver Intl
Air Canada Logo
17:40 - 09:35DEN  Denver Intl-SYD Sydney Kingsford Smith
45h 55m2 stops Toronto Pearson Intl Vancouver Intl
$1,215Air Canada
Thu, 8 Oct - Thu, 15 Oct
Air New Zealand Logo
10:20 - 18:18SYD  Sydney Kingsford Smith-DEN Denver Intl
24h 58m1 stop Vancouver Intl
Air New Zealand Logo
18:05 - 08:20DEN  Denver Intl-SYD Sydney Kingsford Smith
45h 15m1 stop Toronto Pearson Intl
$1,744Air New Zealand
Fri, 13 Nov - Tue, 24 Nov
Air New Zealand Logo
10:20 - 17:56MEL  Melbourne-DEN Denver Intl
25h 36m2 stops Auckland Intl Los Angeles
Air New Zealand Logo
07:55 - 08:55DEN  Denver Intl-MEL Melbourne
31h 00m2 stops Los Angeles Auckland Intl
$1,785Air New Zealand
Thu, 25 Feb - Sun, 7 Mar
United Airlines Logo
12:45 - 08:11MEL  Melbourne-DEN Denver Intl
37h 26m2 stops San Francisco Ontario
United Airlines Logo
15:45 - 09:30DEN  Denver Intl-MEL Melbourne
23h 45m1 stop Los Angeles
$1,812United Airlines
Thu, 22 Oct - Tue, 10 Nov
American Airlines Logo
13:00 - 16:04SYD  Sydney Kingsford Smith-DEN Denver Intl
20h 04m1 stop Dallas/Fort Worth
American Airlines Logo
07:09 - 09:00DEN  Denver Intl-SYD Sydney Kingsford Smith
31h 51m1 stop Los Angeles
$1,840American Airlines
Fri, 29 Jan - Sun, 14 Feb
United Airlines Logo
12:45 - 08:11MEL  Melbourne-DEN Denver Intl
37h 26m2 stops San Francisco Ontario
United Airlines Logo
20:51 - 10:30DEN  Denver Intl-MEL Melbourne
19h 39m1 stop San Francisco
$1,877United Airlines
Fri, 13 Nov - Tue, 24 Nov
American Airlines Logo
22:45 - 11:46MEL  Melbourne-DEN Denver Intl
31h 01m1 stop Los Angeles
American Airlines Logo
13:13 - 05:00DEN  Denver Intl-MEL Melbourne
21h 47m1 stop Dallas/Fort Worth
$1,920American Airlines
Booking Insights

Price, demand, and travel trends for Australia to Denver flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from Australia to Denver with more confidence.

What is the cheapest flight to Denver?

Sydney to Denver is the cheapest route at $1,180 return, found in the past 5 days on KAYAK. KAYAK data shows this is also the most popular route.

How much is a flight to Denver?

A return flight to Denver costs $1,879 on average, based on data over the past 12 months on KAYAK. Return fares from Sydney average $1,759, while Melbourne Airport runs a bit higher at $1,874.

What is the cheapest day to fly to Denver?

Tuesday is the cheapest day to fly to Denver at $1,729 return on average over the past 12 months on KAYAK. Friday is the most expensive at $2,078.

What is the cheapest month to fly to Denver?

  • November is the cheapest month to fly to Denver with an average price of $1,409 return.
  • July ($2,257) and August ($2,077) are the most expensive.
  • Based on KAYAK data over the past 12 months.

What is the cheapest time of day to fly to Denver?

Evening flights to Denver are the cheapest at $1,586 return on average. Night flights are the most expensive at $2,339.

What is a good deal for flights to Denver?

Flights under $1,533 are considered a good deal. 25% of KAYAK users found return flights to Denver at or below these prices, with the lowest fares from:

  • Sydney $1,482
  • Melbourne Airport $1,506
.

When are flights to Denver the cheapest?

Flights to Denver are cheapest 8 weeks before departure. Booking in this window typically costs about 13% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Key details for flights to Denver

Low season

April

Cheapest flight

$622
Best time to beat the crowds (4% less expensive on average)
Most popular time to fly and prices are also 5% lower on average.
Flights from Sydney to Denver

When to book flights to Denver

Are your dates flexible? Find out the best times to travel to Denver based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your questions about flights to Denver, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • What are my dining options at Denver International Airport?

    If you’re hungry after your flight, Denver International Airport offers a wide variety of dining options that cater to all price ranges. You can find everything from quick snacks and fast food to gluten-free treats and Asian cuisine. Most of the dining options can be found around Gates A, B and C, but there are also some at Jeppesen Terminal.

  • What can I do on my layover at Denver International Airport?

    If you have a layover at Denver International Airport, there’s plenty to explore in the airport itself. Between Jeppesen Terminal and Gate A, you can find a skywalk with an exhibition that will take you through the history of aviation in Colorado. If you’re an art lover, there are 20 or so permanent pieces of art (sculptures, exhibits and paintings) to discover as you explore the airport. For a dose of nature, head over to Gates C23 and C24, which feature a wide-open view of The Rocky Mountains.

  • What are the accommodation options near Denver International Airport (DEN)?

    Westin Hotel at Denver International Airport offers on-site accommodation with 519 rooms and a commuter train connection to downtown Denver. AmericanInn by Wyndham Denver Airport, Hyatt House Denver Airport, Best Western Plus Denver International Airport, and Holiday Inn Express Airport are all within a 5min drive from the airport, and each offers a shuttle bus service.

  • Can I smoke at Denver International Airport (DEN)?

    While smoking inside the airport is not allowed, there are a number of designated areas where you can smoke outside the Jeppesen Terminal. Smoking areas can be found on levels 4, 5, and 6 on both the east and west sides of the terminal.

  • What lounges are there in Denver International Airport (DEN)?

    The airport hosts American Airlines Admirals Club (Concourse A), United Club (various locations in East Wing and West Wing), Delta Sky Club (Concourse A), and USO Lounge (Concourse A). Economy class Passengers are welcome to buy a day pass or annual membership.

  • Do arriving Australian citizens have to pass through border control?

    Australian passengers who haven't yet cleared Customs will arrive to the A gate at Denver International Airport and will proceed to the Jeppesen Terminal to go through US Customs and Border Protection. Here, you will have your passport and documentation scanned before collecting your baggage. Denver International Airport offers both Mobile Passport Control and Global Entry for expedited processing.

  • Which cities are served by Denver International Airport (DEN)?

    Denver International Airport is convenient to passengers who wish to travel to Aurora (28.97 km), Colorado Springs (136.8 km), and Albuquerque, New Mexico (556.83 km).

  • Where is the train station at Denver International Airport (DEN)?

    The A Line commuter train runs between DEN and downtown Denver every 15min from 03:00-05:00 and 18:00-01:00. Travel time is approximately 37min. Catch the train at Denver Airport Station at the south end of the Jeppesen Terminal.

  • What is the difference between the most popular and the most frequent airline at Denver?

    United Airlines operates the most flights from Australia to Denver at 0 per week, while Air Canada is the airline most often selected by KAYAK users searching for flights from Australia to Denver. The two are often different because flight volume reflects an airline's schedule, while popularity reflects traveller choice.

  • Where can I fly from to get the cheapest fares to Denver?

    Based on fares booked in the past 5 days, the cheapest flights to Denver are from:
    • Melbourne, from $1,785 return

  • How do I know if a flight to Denver is a good deal?

    A good deal on a flight to Denver is around $1,533 return. This fare is in the lowest 25% of return flight prices searched on KAYAK, averaged across the cities most often searched as origins by KAYAK users.

  • How expensive are last-minute flights to Denver?

    Last-minute fares to Denver – booked within 2 weeks of departure – run 2% below the average return fare of $1,879. Booking late can sometimes save money, but availability is limited.

Your guide to booking Denver flights

From booking to airport arrival, find tips to help you plan your flight with more confidence.
  • For the best chance at a low fare to Denver, aim to book around 8 weeks before you fly. That window historically saves about 13% versus last-minute pricing based on KAYAK booking data over the last 12 months.
  • For flights to Denver, recent KAYAK data shows that stronger deals tend to be around $1,533 return. If you see a fare below that threshold, it's a good deal – book before the price climbs back up.
  • If you can choose when to go, aim to travel to Denver in November. Return fares historically average $1,409 that month – typically the cheapest month to travel based on the last 12 months.
  • Before you book:

    • Check the route's typical price range so you can spot a deal.
    • Confirm baggage fees and seat selection costs on budget carriers.
    • Verify whether you need any travel documents beyond an ID.
    • Pick a departure airport, since your nearest may not be the cheapest origin.
  • Shift your departure to afternoon to save up to $752 per return. Afternoon flights to Denver average $1,586 compared to $2,339 for evening flights. See the time-of-day chart above for the full breakdown.
  • Once you arrive in Denver, a few great places to start are Union Station Denver and Ball Arena. These are popular with first-time visitors and can give you a good feel for the area.
  • If you need help with mobility assistance while at Denver International Airport (DEN), there are wheelchairs available as well as an electric car service. It’s best to contact your airline at least two days before your flight to ensure easy access. On top of that, there are accessible parking spaces right near the entrance of Jeppesen Terminal.
  • Have some time to spare on a layover and feel like you need to relax after a long flight? If so, Denver International Airport features massage centres at Gate C’s centre core and Gate B’s mezzanine. There, you can get a table and chair massage by a trained professional or relax in the massage chairs.
  • If you need a moment for prayer or reflection, head to the sixth floor of Jeppesen Terminal, where you’ll find an interfaith chapel and prayer hall. On Sundays, at 13:00, they hold a Catholic Mass, and there is also an Islamic place of worship available. The chapel opens from approximately 04:00 to 00:00 (midnight).
  • Need to exchange your Australian dollars for US dollars? You can do so at the centre core of Gates A and B. You can also book an appointment to exchange money in Jeppesen Terminal or use the services at the credit union there. Plenty of ATMs can be found around the airport as well.
  • Denver International Airport (DEN) is one of the main airports in the United States, and it’s an important hub for United Airlines, Frontier Airlines and Southwest Airlines.
  • The airport operates a number of international flight routes, serving destinations in Central America, Asia, Canada, Europe, and Mexico.
  • For passengers traveling with infants, Denver International Airport (DEN) provides three nursing rooms with baby care facilities in each of the concourses. Facilities are located near the female restrooms at the center of gates A, B, and C.
  • If you're arriving at Denver International Airport (DEN) by car, there are different options of parking available, from about $ 3 (A$ 4.40) per hour and about $ 33 (A$ 48) for the daily rates. There is also the option of long-term parking starting from $ 8 (A$ 11) per day.
  • Passengers flying from Denver International Airport (DEN) to a domestic destination can use additional check in and bag check services at the Transit Center and Mt. Elbert and Pikes Peak shuttle. Conveniently drop off your luggage and continue to the airport bag free.
  • Pets travelling from Denver International Airport (DEN) get their own private room with turf flooring and artificial rock, where they can relieve themselves before security. The airport also features Paradise 4 Paws resort, which offers webcams, obedience training, massage therapy, and a pool for furry travellers.

Reviews of the top 5 airlines flying to Denver

 
Need help choosing which airline to fly with to Denver? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Air New ZealandOverall score based on 669 reviews
8.5Crew
7.9Comfort
7.5Food
8.2Boarding
7.4Entertainment
Airline reviews

Premium economy seats and food we're very nice although the price could be more affordable so we can do it more often.

10.0 ExcellentSharon, Sept 2026
Read more Air New Zealand reviews

Premium economy seats and food we're very nice although the price could be more affordable so we can do it more often.

mechanical issue, so delayed take-off (hence the low boarding rating) and made a number of people miss their connecting flight. Also took a long time to get our checked baggage. I luckily made mine with 5 minutes to spare, but it was nerve-racking.

Time to upgrade those planes so you can provide first class.

The flight was smooth and on time. Entertainment options were lacking and there was no food, other than some very boring snacks.

A better selection of entertainment would have been nice. I found nothing that appealed to me as a middle-aged traveler. The flight attendants were gracious, helpful, and attentive. It also would have been nice to have more bathrooms as the flight was full and the plane was big.

This flight was the second leg of a trip that began in Auckland, New Zealand. I was unable to find a way to select seats in advance. The boarding passes we were given in Auckland did not have seat assignments for the second flight. There was no way to check on it until personnel showed up at the gate in Los Angeles, immediately before boarding time. The flight was overbooked by one, and since I was traveling with my sister, we needed two seats. We waited in considerable anxiety for everyone else to board and when one person did not show up, we had to take whatever was left. At least we finally got on the flight although we were the very last to board. We were not able to sit together, of course.

The Premium Economy seats were very comfortable and the food was quite tasty. I did not use the entertainment system, but I was able to charge my phone and tablet with the seatback connection.

We had difficulty checking in as United didn’t recognize the confirmation number and the agent was not helpful. We went to the United Assistance desk where the agent was able to process our reservation. We also weren’t allowed to choose seats in advance.

Air New Zealand over sold our flight and tried to bump us to yesterday. After several calls we got booked to United about 6 hrs before our original flight. No apologies!

Couldn’t request a vegan meal somehow but I noticed other people getting them

Overall, it was a very good experience. I would have given it a 10/10, especially based on our flight from SFO to Melbourne. The cabin crew on that flight were wonderful and incredibly attentive. They took extra care when setting up our beds so we could sleep comfortably without being disturbed. Dinner was served promptly and smoothly. I woke up quite late, when the flight was already preparing for landing, and the crew still made sure I was taken care of. They brought me English tea in a proper cup, and when it was time to prepare the cabin for landing, they thoughtfully transferred it into a takeaway cup so I could continue enjoying it along with some breakfast. Those small, thoughtful gestures made the long flight feel much more comfortable and special. The service from the SFO to Melbourne crew was truly excellent.

We had a cancellation due to weather, but the American Airlines staff was very helpful. Once we got on a plane, the trip was great.

Great food and good entertainment options for the long flight.

Loved the food and beverages available, spacious economy class, excellent entertainment

Very good overall. Highly recommend for all flying to Australia

We had bulkhead seats in a A380 in the upper deck in seats 31 D and E. Storage was very limited other than in overhead bin - which is not within reach when in seat. Yet paying same price as others in premium economy who have a lot more storage within arm’s reach. Seems very unfair.

Good check in and helpful staff. Delayed for 1 hour. Took about 45 Mins to get baggage’s at DFW . Food was average ( Hindu meal ) . Overall it was good experience

When I originally booked this flight, I was expecting to travel on Qantas. When the itinerary changed and the long-haul segment was operated by American Airlines, we were disappointed but remained open-minded. Unfortunately, the overall service experience fell far short of expectations. This was a long-haul international flight. Getting up periodically to use the restroom or stretch is inevitable, especially on flights of this duration. However, each time we stood up, we felt as though we were inconveniencing the crew. The tone and body language often suggested that we were in the way or disrupting something simply by moving about the cabin. As a result, I avoided getting up as often as I needed to and was physically very sore upon arrival. Meal service was similarly impersonal. The options were presented in single words “beef or veggie,” “pasta or beef” without any description of what was actually being served. There was little engagement or courtesy beyond that. Even simple expressions of gratitude were often not acknowledged. I am accustomed to no-frills travel and do not expect luxury. What was disappointing was not the absence of extras, but the absence of basic warmth and professionalism. On a long-haul international flight, small moments of courtesy and humanity make a significant difference. In this case, the experience felt transactional and dismissive rather than welcoming. I hope this feedback is taken constructively, as there is a meaningful difference between efficient service and indifferent service.

Business seats not as comfortable or private as most competitors (e.g. Qantas was outstanding), and movie selection was much more limited than Qantas or United has been recently

Hard to move and get out of my seat when the passenger in front is in recline position.

I missed the flight due to maintenance issues. This is the second flight I’ve missed in four days because United allows such little time between layovers. Very disappointing

It was serviceable, nothing special but nothing awful on this leg.

The back to back mechanical delays from Denver to San Diego and then on my return flight from Denver to Great Falls it added extra time both ways

The website check in was poor. Baggage fees were in US dollars but registered in Canadian dollars. The site would not accept my credit card. Scanning the passport was the worst. Someone from United needs to try the process. I’m not a novice with tech and I have to say this was a bad experience. Everything else was great.

Flight was late, the only reason I almost missed my flight was that my connection was also late.

Lufthansa seats were much more comfortable than United. While they had about the same video selection, Lufthansa didn't put advertisements in with the movies like United did. And the Lufthansa food was much better than United.

We flew business fares. Was amazing. However, the check in didn't offer business fares preboarding which is less hectic. 8/10 due to this. Staff compared to Canadian carriers go above and beyond. Would gladly fly United again.

The staff was incredible, very attentive, polite, made you feel like the center of the universe. They even all wrote me a happy birthday card. Truly just an amazing crew, cannot stress it enough.

Checking bag at terminal was horrible. No agents to check us in and only 1 kiosk working. Boarding went ok. Crew onboard was very scattered rained. Missed our row while serving and then didn’t see them hardly again.

The entertainment is a bit limited, it would be better if they added some games to play besides the movies and tv shows. But the seats are comfortable and the crew is polite

Everything was delayed and the staff sent me to the wrong gate, causing me to miss one of my flights. I arrived at my destination 6 hours later than I was supposed to.

On the return flight, arriving in Denver we sat on the tarmac in Denver for over 20 minutes.

The flight was fine. It's the satellite terminal that supports American eagle flights is what sucks. There is only one food option and everything there is way overpriced. I mean I know it's airport pricing, but it's even crazier than that. I bought a sandwich in a plastic container for $18.

Don't change gate multiple times make people run across the airport. Announce delays in a timely manner. Have maintenance crew ready. Don't delay and keep passengers on the plane for 3 hrs. on tarmac.

The flight attendant use 1.5 hours to answer my call. My dirty food tray was unattended.

Our bags took a long time to get unloaded once we landed.

Terrible. The flight was delayed two hours due to weather. Then when we got on the plane, the first pilot ended up timing out and we had to wait for a second pilot. Second pile came on board and we tax it out. Had to return back to the gate because of an unruly passenger. Then the copilot timed out. Had to wait for new copilot. Also had to wait for maintenance to check for fuel. Then found out the second pilot timed out and we had to wait for a third pilot. Was ready to go and then needed maintenance again for another issue. In the end, it was 2 o’clock in the morning when they announced that the flight couldn’t go because the third pilot and the second copilot had timed out.

One of the best flights I’ve had. So smooth.

Because I can’t stand very long in one place, I was allowed to reword.

Flight to Phoenix was delayed 1 hour and was not weather related. Flight Denver was delayed 2.5 hours and again was not weather related as the plane came from San Francisco.

We were told every hour that the flight was delayed until finally late in the day the flight was cancelled. We had to wait in line over an hour to finally get another flight. Once on the flight the host was ridiculously incoherent in the loudspeaker in flight - very inhospitable. Not happy with our experience.

Another good flight experience with Air Canada. The business section did not feature the full length sleeping arrangement, but this was a shorter trip. The food was excellent. But the flight crew was truly top tier: friendly, cheerful, helpful at all the right times. Air Canada truly outshines all U.S. carriers.

Wifi was great. Kind air crew and comfortable seating. Also liked the entertainment options.

I did not noticed baggage was separate - I had assumed international flights included luggage, so it surprised me I had to pay to check a bag.

In a nutshell, my bag, the one I have to pay for, because now you can’t even bring a carry on, did not make it. I am still waiting for an update. The fact that not only were have to pay for it, but on top of that we are stuck without getting it, it’s ridiculous..

flight landed late almost 1.00hr and we 4 passengers missed our connected flight to indianapolis, we need to get the hotel and taxi for the next day flight to home in indianapolis, cost us $ 300 more

Overall good experience. The flight from Toronto to Denver does not have entertainment - movies to watch.

Staff was friendly helpful also good timing I rate it a 10 out of 10

The only issues I have are the seats are very small and so is the overhead storage. You should mention that while booking flights. I had plenty of knee room but I am wider than my seat, and I am not fat at all. The Mitsubishi 900 models need to be upgraded to western size people. I do not know how a 300 pound woman fit into those seats. I had to continuously lean away from the aisle to keep people and flight crew from bumping into my shoulder. 3 hour flight so no entertainment or food, just snacks and a drink, which was no big deal. The buttery/garlic pretzels were pretty tasty.

I was overcharged either by United or sister airline Air Canada. It's exhausting dealing with companies nowadays that irresponsibly abuse access to credit/debit cards.

Travelling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Breckenridge
Boulder
Central City
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Winter Park
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Englewood
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Dillon
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Lakewood
Longmont
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