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Everything you should know

Cheapest return flight
$1,429
Typical prices: $1,572-$2,206
Air Canada
Fri 26/10Fri 2/11
SYD - STL • 2 stops
Cheapest one-way flight
$1,149
Typical prices: $878-$1,393
United Airlines
Fri 2/11
MEL - STL • 1 stop
Top airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
Top routes
Cheapest • 9% average savings
Most popular
Insights
Insights
When to travel
Cheapest • 21% price drop
Most popular
Good to know
+1
Good to know
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We hope you enjoy your trip to St. Louis!
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Booking Insights
Flight Deals

Cheap Flights to St. Louis

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

Recent return flight deals to St. Louis

Mon, 26 Oct - Mon, 2 Nov
Air Canada Logo
10:20 - 15:23SYD  Sydney Kingsford Smith-STL Lambert-St Louis
45h 03m2 stops Vancouver Intl Toronto Pearson Intl
Air Canada Logo
16:05 - 09:35STL  Lambert-St Louis-SYD Sydney Kingsford Smith
48h 30m2 stops Toronto Pearson Intl Vancouver Intl
$1,429Air Canada
Mon, 8 Feb - Mon, 22 Feb
Air Canada Logo
11:20 - 15:26SYD  Sydney Kingsford Smith-STL Lambert-St Louis
45h 06m2 stops Vancouver Intl Toronto Pearson Intl
Air Canada Logo
16:05 - 09:35STL  Lambert-St Louis-SYD Sydney Kingsford Smith
48h 30m2 stops Toronto Pearson Intl Vancouver Intl
$1,469Air Canada
Fri, 5 Feb - Tue, 9 Feb
American Airlines Logo
22:45 - 16:28MEL  Melbourne-STL Lambert-St Louis
34h 43m2 stops Los Angeles Los Angeles Dallas/Fort Worth
American Airlines Logo
09:00 - 05:00STL  Lambert-St Louis-MEL Melbourne
27h 00m1 stop Dallas/Fort Worth
$1,488American Airlines
Fri, 5 Feb - Tue, 9 Feb
American Airlines Logo
22:45 - 16:28MEL  Melbourne-STL Lambert-St Louis
34h 43m2 stops Los Angeles Los Angeles Dallas/Fort Worth
American Airlines Logo
09:00 - 05:00STL  Lambert-St Louis-MEL Melbourne
27h 00m1 stop Dallas/Fort Worth
$1,489American Airlines
Fri, 5 Feb - Tue, 9 Feb
American Airlines Logo
22:45 - 16:28MEL  Melbourne-STL Lambert-St Louis
34h 43m2 stops Los Angeles Los Angeles Dallas/Fort Worth
American Airlines Logo
09:00 - 05:00STL  Lambert-St Louis-MEL Melbourne
27h 00m1 stop Dallas/Fort Worth
$1,492American Airlines
Wed, 20 Jan - Sat, 13 Feb
Air Canada Logo
11:20 - 23:24SYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 04m2 stops Vancouver Intl Chicago O'Hare Intl
Air Canada Logo
16:30 - 09:35STL  Lambert-St Louis-SYD Sydney Kingsford Smith
24h 05m2 stops Denver Intl Vancouver Intl
$1,496Air Canada
Mon, 26 Oct - Mon, 2 Nov
Qantas Airways Logo
22:45 - 09:32MEL  Melbourne-STL Lambert-St Louis
26h 47m2 stops Los Angeles Los Angeles Charlotte Douglas
Qantas Airways Logo
19:06 - 05:00STL  Lambert-St Louis-MEL Melbourne
40h 54m1 stop Dallas/Fort Worth
$1,509Qantas Airways
Mon, 26 Oct - Mon, 2 Nov
Qantas Airways Logo
11:10 - 23:46SYD  Sydney Kingsford Smith-STL Lambert-St Louis
28h 36m1 stop Los Angeles Los Angeles
Qantas Airways Logo
08:10 - 09:00STL  Lambert-St Louis-SYD Sydney Kingsford Smith
31h 50m1 stop Los Angeles Los Angeles
$1,568Qantas Airways
Fri, 5 Feb - Tue, 9 Feb
United Airlines Logo
11:30 - 16:26MEL  Melbourne-STL Lambert-St Louis
21h 56m2 stops Los Angeles Los Angeles Denver Intl
United Airlines Logo
13:09 - 10:30STL  Lambert-St Louis-MEL Melbourne
28h 21m3 stops Chicago O'Hare Intl Houston George Bush Intcntl San Francisco
$2,750United Airlines
Fri, 5 Feb - Tue, 9 Feb
United Airlines Logo
11:30 - 16:26MEL  Melbourne-STL Lambert-St Louis
21h 56m2 stops Los Angeles Los Angeles Denver Intl
United Airlines Logo
13:09 - 10:30STL  Lambert-St Louis-MEL Melbourne
28h 21m3 stops Chicago O'Hare Intl Houston George Bush Intcntl San Francisco
$2,761United Airlines
Booking Insights

Price, demand, and travel trends for Australia to St. Louis flights

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

What is the cheapest flight to St. Louis?

Sydney to St. Louis is the cheapest route at $1,429 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 St. Louis?

A return flight to St. Louis costs $1,861 on average, based on data over the past 12 months on KAYAK. Return fares from Sydney average $1,749, while Brisbane runs a bit higher at $1,838.

What is the cheapest day to fly to St. Louis?

Monday is the cheapest day to fly to St. Louis at $1,684 return on average over the past 12 months on KAYAK. Friday is the most expensive at $2,010.

What is the cheapest month to fly to St. Louis?

  • July is the cheapest month to fly to St. Louis with an average price of $1,472 return.
  • April ($2,355) and September ($2,105) are the most expensive.
  • Based on KAYAK data over the past 12 months.

What is the cheapest time of day to fly to St. Louis?

Evening flights to St. Louis are the cheapest at $1,821 return on average. Night flights are the most expensive at $2,017.

What is a good deal for flights to St. Louis?

Flights under $1,572 are considered a good deal. 25% of KAYAK users found return flights to St. Louis at or below these prices, with the lowest fares from:

  • Melbourne Airport $1,306
  • Brisbane $1,486
.

Key details for flights to St. Louis

Low season

February

Cheapest flight

$1,149
Best time to beat the crowds (6% less expensive on average)
Most popular time to fly (8% more expensive on average)
Flights from Melbourne Airport to St. Louis

When to book flights to St. Louis

Are your dates flexible? Find out the best times to travel to St. Louis 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 St. Louis, answered

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

  • What is the difference between the most popular and the most frequent airline at St. Louis?

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

  • How far is Lambert-St Louis from St. Louis city centre?

    Lambert-St Louis is 21.1 km from St. Louis city centre.

  • Where can I fly from to get the cheapest fares to St. Louis?

    Based on fares booked in the past 5 days, the cheapest flights to St. Louis are from:
    • Melbourne, from $1,488 return

  • How do I know if a flight to St. Louis is a good deal?

    A good deal on a flight to St. Louis is around $1,572 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.

Your guide to booking St. Louis flights

From booking to airport arrival, find tips to help you plan your flight with more confidence.
  • For flights to St. Louis, recent KAYAK data shows that stronger deals tend to be around $1,572 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 St. Louis in July. Return fares historically average $1,472 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 $196 per return. Afternoon flights to St. Louis average $1,821 compared to $2,017 for evening flights. See the time-of-day chart above for the full breakdown.
  • Once you arrive in St. Louis, a great place to start is America's Center Convention Complex. It is popular with first-time visitors and can give you a good feel for the area.

Reviews of the top 3 airlines flying to St. Louis

 
Need help choosing which airline to fly with to St. Louis? 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.
7.5
Qantas AirwaysOverall score based on 1094 reviews
7.4Comfort
7.2Entertainment
7.0Food
8.1Crew
7.7Boarding
Airline reviews

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.

8.0 ExcellentAnonymous, Aug 2026
Read more Qantas Airways reviews

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.

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.

Basic airline, aircraft and service. AA gets you from point A to B. My flight was delayed by 2 hours too.

Flight was delayed “due to earlier delays of that plane”, so we were nearly three hours late.

Crew was amazing, takeoff wonderful. The bathroom was disgusting from before takeoff the odor made the flight uncomfortable as you could smell the bathroom from the center of the plane where we were sitting. Smelled like raw sewage. My daughter was throwing up as we landed due to the smell and horrible turbulence as we approached Newark.

Uncomfortable plastic seats even in premium economy. No free wifi. Even paid wifi was spotty to nonexistent. Bad food. Much worse than economy on foreign carriers like Qantas.

Airport terminal was outdated, flight was on a small jet with no wifi

Essy to get on. The hostess gave very little pop, the plane was late getting in, and we are still waiting for our bags. This sucks. :/

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

Short flight - no food understandable. Flight was delayed for over an hour. Overall, it was good.

We boarded and buckled and then deplaned due to no pilot. Had to wait over 3 hours for a new pilot. Not weather related, just poor management.

Last minute gate change nearly caused us to miss our flight. Change was not announced or displayed in the main board at the old gate. Terrible communication. When we landed we had to wait 20 minutes because there was another plane at the assigned gate. Not the crew’s fault, but adding 20 minutes to a 45 minute flight sucked.

We called Kayak for a change due to the TSA situation in Atlanta. What we got was a canceled return flight (in error) and we had to find the mistake. Not happy with Kayak who blamed it on AA.

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

Boarding delayed 20 minutes for no reason, no wifi, in flight entertainment, or snacks / waters?

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

Improvements in communication and empathy are absolutely necessary for American Airlines staff (top down). It’s like they are numb to the needs of their customers.

I like the speed of boarding and deplaning and the fact that everything was on time. The crew (attendants) were probably quite new and did not begin the in cabin service until 30 min before landing even though there was little to no air turbulence for the last 1.5 hours of the flight. It made for a mad scramble at the end to get trash collected and carts stowed before touch down.

The flights was delayed by hours and it was the firmest landing I have experienced in my life. My back is still sore.

I did like the employee's, they are very friendly and all smiled most of the time, Overall, from checking in bags to getting on plane, not enough employees to be able to get all on the plane, therefore I was not able to get on the plane, due to no one wea there for me to check in my bag, so I decided to go thru the security point and by the time they were done with my bags, I was told that my bag cannot be checked in, and then found out that the lady that does the check in was boarding the customers onto the plane, she said that she was going back and fourth, there for was not able to get on the plane, which changed all my flights by the time I got to Dallas, I was on standby 3 times, and wasn't sure about being able to get on the fourth plane, so ended up buying another plane ticket, so I could make my destination on time.

Not sure about entertainment as I didn't use any, so maybe there should be an NA option on this survey. Otherwise everything was just as it should be. Of course I wish planes were more comfortable and had seats that would tilt back further.

American Airlines “Randy” questioned why I needed preboarding and denied my request for same. Then Randy attempted to berate me when I boarded with my group. I was seated in an exit roll with a young man with a disability that exhibited difficulty controlling and settling himself. But Tandy questioned my disability. The flight was horrible. It was overpacked.

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