ORD - SYD

$630 Find Cheap Flights from Chicago O'Hare Airport to Sydney

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from O'Hare Intl to Sydney departing on 9/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Sydney

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Sydney, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Sydney, as well as popular online travel agencies
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Flights Deals

Cheap Flights from O'Hare Intl to Sydney (ORD-SYD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from O'Hare Intl to Sydney that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from O'Hare Intl to Sydney

Sun, 24 Aug - Tue, 9 Sep
Air Canada Logo
15:40 - 07:20ORD-SYD
24h 40m1 stop
Air Canada Logo
09:20 - 15:00SYD-ORD
20h 40m1 stop
$1,242Air Canada
Find Deal
Sun, 24 Aug - Tue, 9 Sep
Air Canada Logo
15:40 - 07:20ORD-SYD
24h 40m1 stop
Air Canada Logo
09:20 - 16:42SYD-ORD
22h 22m1 stop
$1,291Air Canada
Find Deal
Wed, 29 Oct - Wed, 12 Nov
Air Canada Logo
08:45 - 08:35ORD-SYD
31h 50m2 stops
Air Canada Logo
11:20 - 16:44SYD-ORD
22h 24m1 stop
$1,296Air Canada
Find Deal
Wed, 29 Oct - Wed, 12 Nov
Air Canada Logo
07:15 - 08:35ORD-SYD
33h 20m2 stops
Air Canada Logo
11:20 - 08:00SYD-ORD
37h 40m2 stops
$1,297Air Canada
Find Deal
Sun, 24 Aug - Tue, 9 Sep
Air Canada Logo
15:40 - 07:20ORD-SYD
24h 40m1 stop
Air Canada Logo
09:20 - 08:01SYD-ORD
37h 41m3 stops
$1,302Air Canada
Find Deal
Tue, 19 Aug - Wed, 24 Sep
Air Canada Logo
10:40 - 07:20ORD-SYD
29h 40m2 stops
Air Canada Logo
09:20 - 08:01SYD-ORD
37h 41m3 stops
$1,307Air Canada
Find Deal
Wed, 22 Oct - Wed, 29 Oct
Air Canada Logo
10:40 - 08:20ORD-SYD
29h 40m2 stops
Air Canada Logo
10:20 - 08:00SYD-ORD
37h 40m3 stops
$1,308Air Canada
Find Deal
Tue, 28 Oct - Tue, 18 Nov
Air Canada Logo
13:19 - 08:35ORD-SYD
27h 16m2 stops
Air Canada Logo
11:20 - 08:00SYD-ORD
37h 40m3 stops
$1,318Air Canada
Find Deal
Mon, 20 Oct - Mon, 3 Nov
 Logo
06:20 - 12:45ORD-SYD
38h 25m2 stops
 Logo
06:00 - 22:59SYD-ORD
33h 59m2 stops
$1,496
Find Deal
Mon, 27 Oct - Sun, 9 Nov
 Logo
06:20 - 12:45ORD-SYD
38h 25m2 stops
 Logo
06:00 - 22:59SYD-ORD
33h 59m2 stops
$1,529
Find Deal
Booking Insights

KAYAK's insights & trends for O'Hare Intl to Sydney flights

Get data-powered insights and trends into flights from O'Hare Intl to Sydney to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Chicago O'Hare Airport to Sydney?

The average price of all round-trip flights from Chicago O'Hare Intl Airport to Sydney clicked on KAYAK for each day over the last 12 months.

When flying from Chicago O'Hare Airport to Sydney, you should consider leaving on a Friday and avoid Thursdays if you are looking for the best rates. For your return to Chicago O'Hare Airport, you’ll find the best rates on Mondays and the most expensive ones on Sundays.

What is the cheapest month to fly from Chicago O'Hare Intl Airport to Sydney?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Chicago O'Hare Intl Airport to Sydney, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Chicago O'Hare Intl Airport to Sydney is March, where tickets cost $1,330 (return) on average. On the other hand, the most expensive months are December and October, where the average cost of round-trip tickets is $2,160 and $2,123 respectively.

How far in advance should I book a flight from Chicago O'Hare Intl Airport to Sydney?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Chicago O'Hare Intl Airport to Sydney, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Chicago O'Hare Intl Airport to Sydney, you should book around 3 weeks before departure, which saves you about 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.


Good to know

Low seasonJuly
Cheapest flight$630
Best time to beat the crowds but there is an average 23% increase in price.
Most popular time to fly and prices are also 21% lower on average.
Flight from Chicago O'Hare Airport to Sydney

When to book flights from O'Hare Intl to Sydney

Are your dates flexible? Find out the best times to travel from O'Hare Intl to Sydney based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Chicago O'Hare Airport to Sydney flights

  • US citizens need a visa to travel to Sydney, Australia. US citizens can also apply for various visas, including student visas, employment visas, family visas, visitor visas, Evisitor visas, Electronic Travel Authority (ETA), Work and Holiday visas, depending on their circumstances. It's important to note that visa requirements may vary depending on the purpose and duration of the trip, and each application is subject to individual assessment.

    What is the luggage allowance on Air New Zealand flights from Chicago O'Hare Airport to Sydney?

  • Air New Zealand allows economy class passengers to bring one cabin bag that weighs no more than 15 lbs. The class also includes one checked bag not exceeding 50lbs. Premium Economy passengers can bring two bags, each weighing no more than 50 lbs while Business Premier passengers can bring three bags each weighing no more than 50 lbs.

    What services does Delta offer for passengers in economy class on flights from Chicago O'Hare Airport to Sydney?

  • Delta offers various services to passengers in economy class on flights from Chicago O'Hare Airport to Sydney. These include complimentary snacks and beverages, in-flight entertainment, such as movies, TV shows, and music, Wi-Fi access at an additional cost, and comfortable seating.

    What seat selection options are available on flights from Chicago O'Hare Airport to Sydney with Qantas Airways?

  • Qantas Airways offers several options for seat selection on their flights from Chicago O'Hare Airport to Sydney. Passengers can choose a standard seat at the time of booking or during check-in at no extra cost. Passengers can also decide to upgrade to seats with extra legroom for an additional fee. These seats are typically located in exit rows or at the front of the cabin.

    Can I cancel my booking for flights from Chicago O'Hare Airport to Sydney with Air Canada?

  • What is the cheapest flight from Chicago O'Hare Intl Airport to Sydney?

    In the last 3 days, the lowest price for a flight from Chicago O'Hare Intl Airport to Sydney was $406 for a one-way ticket and $800 for a return.

  • Which aircraft models fly most regularly from Chicago O'Hare Airport to Sydney?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Chicago O'Hare Airport to Sydney?

    oneworld, and Star Alliance are the airline alliances operating flights between Chicago O'Hare Airport and Sydney, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Chicago to Sydney, Qantas Airways or Air Canada?

    The two airlines most popular with KAYAK users for flights from Chicago to Sydney are Qantas Airways and Air Canada. With an average price for the route of $1,428 and an overall rating of 7.5, Qantas Airways is the most popular choice. Air Canada is also a great choice for the route, with an average price of $1,829 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Chicago O'Hare Airport to Sydney?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Chicago O'Hare Airport to Sydney.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Chicago O'Hare Airport to Sydney?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from Chicago O'Hare Airport is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Chicago O'Hare Airport to Sydney?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Sydney with an airline and back to Chicago O'Hare Airport with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago O'Hare Airport to Sydney?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sydney from Chicago O'Hare Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Chicago O'Hare Intl Airport to Sydney

  • #¡REF!
  • Flights from Chicago O'Hare Airport (ORD) to Sydney (SYD) usually entail one or two stops in various cities depending on the airline you choose. Some common layovers for this route include Auckland (AKL), Christchurch (CHC), Los Angeles (LAX), Houston (IAH), San Francisco (SFO), and Dallas (DFW).
  • Air India provides special assistance to passengers with reduced mobility on flights from Chicago O'Hare Airport (ORD) to Sydney (SYD). The airline specifically offers boarding and deplaning assistance, and assistance in moving around the airport.
  • ANA provides baby bassinets for infants up to 8 months on flights from Chicago O'Hare Airport (ORD) to Sydney (SYD). The airline also offers special children's meals, which are designed to suit the dietary requirements and tastes of young children, including vegetarian options, gluten-free options, and more.
  • There are several transportation options to get from Sydney Airport (SYD) to the city center. One option is the Airport Link train. The train station is located beneath the airport's Terminal 1, and the journey takes around 15 minutes to reach the city center. Train tickets can be purchased at the airport's train station or online.

Reviews of the top airlines flying from O'Hare Intl to Sydney

 
See real verified KAYAK customer reviews for airlines flying from Chicago to Sydney. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from O'Hare Intl to Sydney? 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 887 reviews
8.2Crew
7.7Boarding
7.2Entertainment
7.4Comfort
6.9Food
Airline reviews

Business class points redemption - good value for points paid, dubious value if out of your own pocket, domestic class business product okay for this length of flight. The flight left and arrived on time, crew were good, aircraft was a bit old and tired, but still miles ahead of their competitors in Virgin and Jetstar.

8.0 ExcellentMarcus, July 2025SYD - ADL
Read more Qantas Airways reviews

Business class points redemption - good value for points paid, dubious value if out of your own pocket, domestic class business product okay for this length of flight. The flight left and arrived on time, crew were good, aircraft was a bit old and tired, but still miles ahead of their competitors in Virgin and Jetstar.

Airline running better than post Covid, proper boarding process now implemented, some aircraft feeling a bit old and tired, crew fine, online experience better.

Five hour flight instead of four hours due to westerly headwinds which wasn’t the fault of Qantas !

The wifi was out. Otherwise it was great flight. Richard, as CSM, was excellent.

Was bumped to a later flight because of inefficiency on part of the airline.

The Emerits/Qantas flight was cancelled to Wellington. We need a refund. Had to buy another airline ticket. How do we get the refund. Still not in Wellington.

Delayed QF59 flight once again, Qantas doesn't fail in maintaining there delayed departures and arrivals. USB points do not work nor do the power point sockets on the plane, Qantas staff admitted that on the flight. Don't expect to your charge devices. Saving grace, was the ice cream. Bottom line, if you expect to fly to HND and make it on time avoid Qantas and if you're interested in ice cream - visit 7/11.

Pretty excellent. I don’t know what the pilot could have done better with the bumping ( there was a storm) nor what happened to my ears coming down into bendigo. It doesn’t happen coming down into Sydney just the return flight. I wonder why?

Loved the staff. The economy seats could have been bigger.

Airport and crew experience was excellent. We had to queue for the runway - no one’s fault, but it did mean we were 30 minutes late leaving

Both flights are delayed so I rate the whole experience as mediocre.

I booked my flight months ago, and checked-in online about 12 hours before the flight. I received an email confirmation of check-in. I had no subsequent communication from Air Canada after my original booking. After arriving at the airport three hours before the flight, as instructed, I waited 90 minutes for an agent to appear to check my bag. I was informed that my flight had been canceled many weeks before, and that flight was no longer being run!! I showed a copy of my check-in confirmation, but no explanation could be found. I was placed on standby for the next flight and the connection. Luckily, those flights were not full and I arrived at my destination. I double checked my email, but I received no update about the flight from Air Canada until the day of the flight.

I had a good experience. I liked being informed about the status of my luggage

Very bad service the way back we was on the way for r two days very bad condition and waiting for luggage till now

Flight was delayed by 1.5hrs. Once inside, people had their small handbags on the storage. The crew (male guy) was not helpful in making some space in the storage. Instead, he asked few bags to be checked-in and it was not a great experience. No attempt to help but just followed the things with a straight face. People had their literally small bags and he wouldnt not move from one storage to another even if there was space and would not let us do i as well. Once flight was on, they ran out of Orange juice, really running out of orange juice when the temp were 32.degrees outside. didnt made the sense. Onasking for a extra snack, he made a face as if he was giving me out of his pocket. if the flight was delayed, there could have an attempt to provide something extra incase people did asked.

Abandoned me in hallway in a wheelchair… which I asked for because I sprained my back. After waiting in the hallway, I decided to walk the rest of the way since someone respecting me up.. My experience with the united was totally the opposite. Wheelchair access, propped swift and save me a lot of grief. Air Canada totally disorganized.

Terrible confusion btw air Canada and United. Wasn’t able to change ticket because I had purchased on kayak. Rethinking booking tickets on this site, and will try to avoid United and aircanada going forward.

Conflicting information provided about baggage allowance. One screen said I had a carry on and another said I didnt.

I think overall both Air Canada and Air New Zealand did a good job the their flights. It is nice to have movies, music, podcasts etc to watch for the long flights. Just wish the seats were wider and had a foot rest to change my leg positions during the trips.

Miserable staff as it was a late/delayed flight and crew wasn’t in the best spirits. Completely understood as neither was most of the passengers. Still unacceptable l.

Everything you need to know for your flight from O'Hare Intl to Sydney

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