ORD - SYD

$772 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 31/1. 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, 0 bags

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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Everything you should know

Cheapest return fare
$1,331
Typical prices: $1,267-$1,570
Qantas Airways
Wed 11/2Wed 4/3
ORD - SYD • 1 stop
Cheapest one-way flight
$772
Typical prices: $626-$1,170
Multiple Airlines
Sat 31/1
ORD - SYD • 2 stops
Top airlines
Air Canada
Cheapest • from $1,453 (return)
Qantas Airways
Best reviews • 7.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travellers who book at least 3 weeks in advance save around 24% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
May
Cheapest • 21% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Sydney!
Flight Deals
Booking Insights
Flight 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

Wed, 11 Feb - Wed, 4 Mar
Qantas Airways Logo
15:10 - 09:00
ORD
-
SYD
24h 50m1 stop
Qantas Airways Logo
07:05 - 16:38
SYD
-
ORD
26h 33m2 stops
$1,331Qantas Airways
Sun, 1 Feb - Sun, 15 Feb
Air Canada Logo
15:35 - 09:35
ORD
-
SYD
25h 00m1 stop
Air Canada Logo
11:20 - 14:41
SYD
-
ORD
20h 21m1 stop
$1,354Air Canada
Mon, 2 Feb - Mon, 16 Feb
Qantas Airways Logo
18:40 - 09:00
ORD
-
SYD
21h 20m1 stop
Qantas Airways Logo
07:05 - 21:33
SYD
-
ORD
31h 28m2 stops
$1,355Qantas Airways
Sun, 1 Feb - Sun, 15 Feb
Air Canada Logo
15:35 - 09:35
ORD
-
SYD
25h 00m1 stop
Air Canada Logo
11:20 - 20:10
SYD
-
ORD
25h 50m2 stops
$1,358Air Canada
Tue, 27 Jan - Tue, 3 Feb
Qantas Airways Logo
15:10 - 07:25
ORD
-
SYD
23h 15m1 stop
Qantas Airways Logo
19:15 - 16:49
SYD
-
ORD
38h 34m2 stops
$1,375Qantas Airways
Sun, 1 Feb - Sun, 15 Feb
Air Canada Logo
15:35 - 09:35
ORD
-
SYD
25h 00m1 stop
Air Canada Logo
11:20 - 14:41
SYD
-
ORD
20h 21m1 stop
$1,421Air Canada
Sun, 1 Feb - Sun, 15 Feb
Air Canada Logo
15:35 - 09:35
ORD
-
SYD
25h 00m1 stop
Air Canada Logo
11:20 - 14:41
SYD
-
ORD
20h 21m1 stop
$1,423Air Canada
Sun, 1 Feb - Sun, 15 Feb
Air Canada Logo
15:35 - 09:35
ORD
-
SYD
25h 00m1 stop
Air Canada Logo
11:20 - 19:45
SYD
-
ORD
25h 25m2 stops
$1,426Air Canada
Sun, 1 Feb - Sun, 15 Feb
Air Canada Logo
15:35 - 09:35
ORD
-
SYD
25h 00m1 stop
Air Canada Logo
11:20 - 14:41
SYD
-
ORD
20h 21m1 stop
$1,429Air Canada
Sun, 1 Feb - Sun, 22 Feb
Air Canada Logo
15:35 - 09:35
ORD
-
SYD
25h 00m1 stop
Air Canada Logo
11:20 - 14:41
SYD
-
ORD
20h 21m1 stop
$1,433Air Canada
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.

How much is a return flight from Chicago O'Hare Intl Airport to Sydney?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from Chicago O'Hare Intl Airport to Sydney departing in February.

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 May, where tickets cost $1,276 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $2,377 and $2,112 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 24% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$772
Best time to beat the crowds but there is an average 17% 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 $772 for a one-way ticket and $1,354 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 is the only airline alliance operating flights between Chicago O'Hare Airport and Sydney.

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

    The two airlines most popular with KAYAK users for flights from Chicago to Sydney are Qantas Airways and American Airlines. With an average price for the route of $2,377 and an overall rating of 7.5, Qantas Airways is the most popular choice. American Airlines is also a great choice for the route, with an average price of $1,301 and an overall rating of 7.2.

  • 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 946 reviews
7.5Comfort
8.1Crew
7.7Boarding
7.0Food
7.2Entertainment
Airline reviews

Flight was canceled. I was not alerted. It was only kayak that alerted me

2.0 MediocreGerard, Nov 2025
CBR - BNE
Read more Qantas Airways reviews

Flight was canceled. I was not alerted. It was only kayak that alerted me

Flight was 2.5 hours late leaving. We spent 50 minutes of that sitting on the plane with no explanation. They did reduce the time in the air so we arrived a little less late which was something. The cheese and crackers were okay but the wine was terrible.

Couldn't access entertainment on app as said in an email

Excellent as always, I won't fly to Australia, and back to the US on any other airline. The flight crew is always top notch, and have a way to make one feel extra special. Thank you for your service, I would rate Qantas Airways a 10+.

After already paying for excess luggage prior to flight, i was advised AT check in that i had to pay $816 or forfeit my flight! The lady at the counter was SO rude and had already started offboarding me when i said i would pay it after asking her three times for the exact amount! Have lodged a formal complaint yet heard nothing. Will not ever travel via Qantas again

A few more inches of legroom is all i ask

One of the best Qantas business flights I've had. Quality product

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 !

We loved the steward on the plane. He made the night enjoyable

The plane was late, when we did board the plane was as cold as a freezer. I was freezing the entire flight, no blankets. Lost miserable flight I’ve ever had.

My wife and I love to travel, so we fly a lot. We've already logged 381,075 miles and with practically every major airline. But this flight was very disappointing. It started off well, with no delays and a new plane. But when lunchtime approached, all that good impression was ruined. Instead of white tablecloths, we were offered small, dark placemats, which, as it turned out, were perfectly adequate for the food. All the food offered—and my wife and I only took fish, and the meat—was not just bad, it was downright disgusting and not heated enough. The same applies to the appetizers. This was the first time in many years of traveling that we've been offered such disgusting food.

Lost luggage stuck no clothes and no word after 2 days leaving on cruise no stuff or clothes

3 hour weather delay followed by 1 hour (and counting) maintenance delay. UGH!

After we'd boarded , they canceled the flight. The crew didn't even know , we just all received text messages. Then after they deplaned us , AA was just like "too bad, go F your self, we sure ain't gonna help you"

After a two hour delay, my flight was CANCELLED! No pilot available. Such BS.

Amazing food, great staff, with one noticable detail missing ...but no seat entertainment in any of aircraft ...I am not a fan

Bad food, small seats that didn’t recline. I thought I was buying a quantas ticket so I feel like I got scammed

I wish American Airlines would change the airline industry by loading the plane back to front instead of front to back. Planes would board so much more smoothly and quickly.

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

Information on your arrival and departure airports