ORD - SYD

$513 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 8/30. 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

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Sydney.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Sydney.
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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 round-trip 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 round-trip flight deals from O'Hare Intl to Sydney

Wed, Aug 6 - Wed, Aug 13
 Logo
6:40 am - 7:05 amORD-SYD
33h 25m1 stop
 Logo
9:10 am - 5:15 pmSYD-ORD
23h 05m2 stops
$1,017
Find Deal
Wed, Aug 6 - Wed, Aug 13
 Logo
6:40 am - 7:05 amORD-SYD
33h 25m1 stop
 Logo
9:10 am - 6:00 amSYD-ORD
35h 50m1 stop
$1,030
Find Deal
Sat, Aug 30 - Fri, Sep 12
 Logo
7:09 pm - 11:45 amORD-SYD
25h 36m2 stops
 Logo
1:15 pm - 11:31 pmSYD-ORD
25h 16m2 stops
$1,037
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Thu, Jul 31 - Thu, Aug 7
 Logo
6:10 am - 7:30 amORD-SYD
34h 20m1 stop
 Logo
9:10 am - 10:46 pmSYD-ORD
28h 36m1 stop
$1,053
Find Deal
Tue, Aug 12 - Tue, Aug 19
Fiji Airways Logo
6:20 pm - 10:10 pmORD-SYD
36h 50m2 stops
Fiji Airways Logo
1:15 pm - 8:57 pmSYD-ORD
22h 42m2 stops
$1,175Fiji Airways
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Tue, Sep 2 - Tue, Oct 14
Fiji Airways Logo
7:03 pm - 10:10 pmORD-SYD
36h 07m2 stops
Fiji Airways Logo
2:15 pm - 9:02 pmSYD-ORD
22h 47m2 stops
$1,244Fiji Airways
Find Deal
Wed, Jul 30 - Wed, Aug 6
United Airlines Logo
12:54 pm - 6:55 amORD-SYD
27h 01m2 stops
United Airlines Logo
10:20 am - 6:20 amSYD-ORD
35h 00m2 stops
$1,247United Airlines
Find Deal
Tue, Aug 12 - Tue, Aug 19
Qantas Airways Logo
7:03 pm - 7:05 amORD-SYD
21h 02m1 stop
Qantas Airways Logo
9:10 am - 3:55 pmSYD-ORD
21h 45m1 stop
$1,364Qantas Airways
Find Deal
Tue, Aug 5 - Wed, Aug 13
Qantas Airways Logo
6:20 pm - 6:55 amORD-SYD
21h 35m1 stop
Qantas Airways Logo
9:10 am - 5:43 pmSYD-ORD
23h 33m1 stop
$1,368Qantas Airways
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Tue, Sep 2 - Tue, Sep 30
Air Canada Logo
3:40 pm - 7:20 amORD-SYD
24h 40m1 stop
Air Canada Logo
9:20 am - 8:11 pmSYD-ORD
25h 51m2 stops
$1,372Air Canada
Find Deal
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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 Saturday 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 $857 (return) on average. On the other hand, the most expensive months are December and October, where the average cost of round-trip tickets is $1,456 and $1,373 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 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low seasonJuly
High seasonMay
Cheapest flight$513
Best time to beat the crowds but there is an average 20% increase in price.
Most popular time to fly and prices are also 22% 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 round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 $513 for a one-way ticket and $1,017 for a round-trip.

  • Do I need a passport to fly between Chicago O'Hare Airport and Sydney?

    Yes

  • 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?

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

  • What is the most popular layover when flying to Sydney from Chicago O'Hare Airport?

    Los Angeles is the most popular layover city among KAYAK users traveling from Chicago O'Hare Airport to Sydney.

  • Which is the best airline for flights from Chicago to Sydney, ANA or Fiji Airways?

    The two airlines most popular with KAYAK users for flights from Chicago to Sydney are ANA and Fiji Airways. With an average price for the route of $1,144 and an overall rating of 8.3, ANA is the most popular choice. Fiji Airways is also a great choice for the route, with an average price of $1,181 and an overall rating of 8.0.

  • 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 travelers 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 round-trip ticket. You could then fly to Sydney with an airline and back to Chicago O'Hare Airport with another airline. Booking your flights between Chicago O'Hare Airport and SYD can sometimes prove cheaper using this method.

  • 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 5 airlines serving 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.
8.0
DeltaOverall score based on 7963 reviews
8.5Crew
7.3Food
8.2Boarding
7.9Entertainment
7.9Comfort
Airline reviews

I like for how they process during check in. It was very smoothly.

10.0 ExcellentAbdulla, Jun 2025CMH - JFK
Read more Delta reviews

I like for how they process during check in. It was very smoothly.

The flight was scheduled for 2:30 PM. Early in the morning we got a text message saying the flight was delayed and rescheduled for 3:00 PM. We got to the airport with that in mind. Then we got a message during check-in at the flight was rescheduled again for 2:30 PM. We almost missed our flight. In fact, our bags Were told that they would not make it. At the end, everything worked out. But it is very stressful.

Overall, aside from the baggage issue, it was as good as one expects.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

I want to single out flight attendant Mitch who was in the Premium Economy section. When my wife’s hearing aide dropped through the cushion under the seat he was able to locate it and return it to her. Food was a different matter. Dinner was fine. Breakfast was another matter. They had a yogurt dish that the ran out of and the alternative was not very good according to those we talked to.

Excellent check-in. Crew was good. Excellent communication from flight deck.

Great overall. There was a bit of turbulence so they could only serve water because too much turbulence for the carts. Was glad they prioritized safety though

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

Flight was delayed long enough that I was misding my connecting flight. The agents could not get me on a comparable flight, nor could they get me s Main Cabin seat I had paid for, nor could they get me on a comparable connecting flight. The gate agent would not issue meal vouchers, even though I was delayed over six hours! I had to spend over an hour and 15 minutes with customer service on the phone to See if they could get me on a better flight and get a meal voucher. Customer service was not helpful enough in trying to find alternate flights and it Ended up taking me 24 hours for a 12 hour trip!! Delta does not provide upgrades NOR will they even give you a pass for a few hours to their lounge. They claim that they do not issue daily passes to their lounge anymore. I call BS since this would be no extra cost to them to provide excellent customer service and give you a few hours to relax in comfort when you’re sitting in a crowded airport and your flight has been screwed up for that many hours.

Great service. Flight was delayed while we sat on the runway for a couple of hours. Weather related. Staff made is very bearable. The steward servicing the first class cabin was exceptional. Thank you! 💗

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

Overall good experience with flight and airport wheelchair staff. Also got Indian food in the flights

I liked the service, the menu, and the comfort of the seats! Even tho we were seated by the bathrooms, the reclining seats and movie selection was very good, my husband and I didn’t mind at all

Very good as always, stand out airline. The passengers whom choose to stuff baggage that otherwise should be checked-in is a real bother but that's not the airlines doing. A real frustration that passengers just don't want to check-in luggage. This is a pet hate unfortunately.

It’s a two prop flight so I had problems with my ears on re- entering ! But otherwise fine

Evidently, my seat had the only broken TV. I couldn’t plug it in, get it to come on, or watch anything, and of course, no one could fix it while we were on the plane. The service was good and the boarding was quick

The boarding of took of late.The presentation of the food was horrable as was the tast of the food was cold and tastless.

Delay and keep changing gates. I have to run around from B to C then to E.

I was charged for my daughters bag when I am supposed to receive two free checked bags with my United Explorer card.

The schedule to Moline changed 5 times. The gate changed 6 times. That is a pathetic way to run an airline. No wonder that no one in our company flies on United Express to or from Moline. Changes happen most of the time. I learned my lesson on this trip…never again!

Flight was great. Efficient boarding. Short flight. Early arrival. Friendly flight crew. The entertainment system did not work well. Could not access it until the aircraft reached 10K feet or more. Lots of glitches.

A bit rush for transit. Food and entertainment are not available

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

Smooth boarding process. Early departure, smooth flight, early arrival. The entertainment package has very good recent movie options. The flight crew were friendly and professional.

I do prefer to fly United and have always had excellent service, except for bad weather. Flights are on time and staff is alway curtious and helpful

I have long legs, my foot was out in the aisle and when a flight attendant came walking by and I didn't notice, instead of saying "excuse me" or anything like that, she kicked my foot. Extremely rude

Worst seats I’ve ever had !!! The seats were very narrow and uncomfortable and misaligned with the seats in front of mine leading to bottom of the seat in front of mine pressing on my legs for 15.5 hours !

Excellent! The gate agents were kind enough to rebook me on an earlier flight saving me from a 6 hour layover. Even my luggage made it despite the fact that the connection was technically too narrow. The flight itself was very comfortable, roomy, and clean. Plenty of space for my carryon items with plugs to charge my phone. After a long international flight of 14 hours, this was an excellent way to end my travels!

Great experience. Flight boarded easily. Departed early. Smooth flight. Great arrival in DC--almost no taxing! Almost direct to gate from runway. Crew was terrific. Same cookies and beverages in main cabin. I did not use the entertainment system on this flight.

This particular flight wasn't very full at the back, so there were three seats available for spreading out and getting relatively comfortable

Most of the delay was due to weather which is not what was at issue here. One delay was due to a missing flashlight and in the end the flashlight was actually found on the plane. The entertainment system is very limited. Live TV options offer only a few channels that are not very appealing. Boarding and deplaning are always difficult. It just takes too much time to get on and off the plane. On the plus side, I missed my connecting flight, but was easily able to book a later flight from the app while enroute.

You were more on time than United. I'm so over united delays.

The meals were mediocre and the alcohol selection was poor. I enjoyed the selection of movies and other entertainment.

I chatted with the captain before the flight, and similarly during the welcome announcement, he warned of a turbulent flight that may impact the in-flight service. However, once at altitude, he announced that the weather changed and he immediately turned off the seatbelt sign. But it appeared the cabin crew had already decided to take off this flight. They remained seated and then just chatted in the galley. The flight was fully catered, but only first class received service.

My flight attendant was attentive! The elderly person next to me was flatulent and the flight attendant could see that I was in distress and brought me some face masks

Flight was delayed but the real issue is how long we sat after boarding. Space very limited for an overnight flight and seatbacks didn’t recline so it was almost impossible to sleep.

The staff made sure I was comfortable, moved me to a better seat with more leg room

Easy boarding and comfortable seating were plusses. Enjoyed the experience and good service from the captain and crew. Many thanks...!

Somehow, my booking was under my preferred name instead of my legal name so they almost didn’t let me board the plane at LAX. This problem should have been notified to me when I was still in Toronto.

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.

It was a short flight, and no entertainment. That was not a problem for us, but there is no option for "not applicable". There was a bit of turbulence, so there was no food service.

All was good except for the seats, not very comfy.

2.5 hour delay sitting in the plane on the tarmac, you tell me how the experience was

This flight didn't happen for me because of overbooking.

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