SYD - ORD

$478 Find Cheap Flights from Sydney to Chicago O'Hare Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Sydney to O'Hare Intl departing on 10/15. 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 Chicago O'Hare Intl Airport

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

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Sydney to O'Hare Intl 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 Sydney to O'Hare Intl

Sun, Sep 28 - Wed, Oct 8
Air Canada Logo
9:20 am - 3:00 pmSYD-ORD
20h 40m1 stop
Air Canada Logo
3:45 pm - 8:20 amORD-SYD
24h 35m1 stop
$966Air Canada
Find Deal
Sat, Oct 4 - Sat, Oct 11
Air Canada Logo
9:20 am - 4:51 pmSYD-ORD
22h 31m2 stops
Air Canada Logo
1:27 pm - 8:20 amORD-SYD
26h 53m2 stops
$982Air Canada
Find Deal
Mon, Sep 15 - Thu, Dec 4
Air New Zealand Logo
8:45 am - 11:15 pmSYD-ORD
29h 30m2 stops
Air New Zealand Logo
2:35 pm - 8:45 amORD-SYD
25h 10m2 stops
$1,010Air New Zealand
Find Deal
Thu, Sep 11 - Sat, Sep 27
 Logo
5:45 pm - 10:31 amSYD-ORD
31h 46m2 stops
 Logo
7:00 am - 7:30 amORD-SYD
33h 30m1 stop
$1,020
Find Deal
Thu, Sep 11 - Sat, Sep 27
 Logo
9:10 am - 10:43 pmSYD-ORD
28h 33m1 stop
 Logo
7:00 am - 7:30 amORD-SYD
33h 30m1 stop
$1,031
Find Deal
Fri, Oct 10 - Fri, Oct 17
United Airlines Logo
10:30 am - 5:05 pmSYD-ORD
22h 35m2 stops
United Airlines Logo
4:40 pm - 7:55 amORD-SYD
23h 15m2 stops
$1,050United Airlines
Find Deal
Tue, Sep 30 - Wed, Nov 12
American Airlines Logo
9:10 am - 6:08 pmSYD-ORD
23h 58m2 stops
American Airlines Logo
1:49 pm - 9:00 amORD-SYD
26h 11m1 stop
$1,089American Airlines
Find Deal
Tue, Sep 30 - Wed, Nov 12
American Airlines Logo
9:10 am - 3:51 pmSYD-ORD
21h 41m1 stop
American Airlines Logo
3:00 pm - 9:00 amORD-SYD
25h 00m1 stop
$1,098American Airlines
Find Deal
Fri, Nov 14 - Sun, Jan 4
United Airlines Logo
12:10 pm - 4:58 pmSYD-ORD
21h 48m2 stops
United Airlines Logo
7:05 am - 9:15 amORD-SYD
33h 10m1 stop
$1,143United Airlines
Find Deal
Fri, Nov 14 - Sun, Jan 4
Air New Zealand Logo
1:55 pm - 10:57 pmSYD-ORD
26h 02m2 stops
Air New Zealand Logo
1:04 pm - 8:45 amORD-SYD
26h 41m2 stops
$1,181Air New Zealand
Find Deal
Booking Insights

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

Get data-powered insights and trends into flights from Sydney to O'Hare Intl 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 Sydney to Chicago O'Hare Airport?

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

For Sydney to Chicago O'Hare Airport, Monday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Chicago O'Hare Airport back to Sydney, the best deals are generally found on Saturday, with Thursday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Sydney to Chicago O'Hare Intl Airport, 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 Sydney to Chicago O'Hare Intl Airport is February, where tickets cost $718 (return) on average. On the other hand, the most expensive months are December and September, where the average cost of round-trip tickets is $1,690 and $1,159 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Sydney to Chicago O'Hare Intl Airport, 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 Sydney to Chicago O'Hare Intl Airport, you should book around 4 weeks before departure, which saves you about 23% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$478
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly with an average 65% increase in price.
Flight from Sydney to Chicago O'Hare Airport

When to book flights from Sydney to O'Hare Intl

Are your dates flexible? Find out the best times to travel from Sydney to O'Hare Intl 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 Sydney to Chicago O'Hare Airport flights

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

    In the last 3 days, the lowest price for a flight from Sydney to Chicago O'Hare Intl Airport was $478 for a one-way ticket and $966 for a round-trip.

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

    Yes

  • Which airports will I be using when flying from Sydney to Chicago O'Hare Airport?

    When flying out of Sydney you will be using Sydney Kingsford Smith. You will be landing at Chicago O'Hare Airport, also known as Chicago O'Hare Intl.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Sydney to Chicago are Qantas Airways and American Airlines. With an average price for the route of $762 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 $1,143 and an overall rating of 7.2.

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

    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 Sydney to Chicago O'Hare Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago O'Hare Airport from Sydney 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 Sydney to Chicago O'Hare Airport?

    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 Chicago O'Hare Airport with an airline and back to Sydney with another airline. Booking your flights between Sydney and ORD 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 Sydney to Chicago O'Hare Airport?

    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 Chicago O'Hare Airport from Sydney up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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

 
See real verified KAYAK customer reviews for airlines flying from Sydney to Chicago. 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 Sydney to O'Hare Intl? 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 905 reviews
7.7Boarding
7.5Comfort
8.2Crew
6.9Food
7.2Entertainment
Airline reviews

My flight from Dallas to Sydney was cancelled. My entire trip was rerouted to include the following: Hartford to Washington DC Washington DC to JFK JFK to Auckland Auckland to Christchurch I paid for an aisle seat on the flight to Auckland and was asked if I would take a window seat to accommodate a family. The agent at the podium failed to mention that the family had a 3 month old baby and that a bassinet would be used during the 16 hour flight. The only way I could get out of my seat was to crawl under the bassinet of the sleeping baby. I think it is wrong that I was no given the choice to sit in another seat, that the agent knew what she was doing and chose to not properly disclose my seating arrangement. Terrible treatment.

2.0 MediocreAnonymous, Aug 2025BDL - DFW
Read more Qantas Airways reviews

My flight from Dallas to Sydney was cancelled. My entire trip was rerouted to include the following: Hartford to Washington DC Washington DC to JFK JFK to Auckland Auckland to Christchurch I paid for an aisle seat on the flight to Auckland and was asked if I would take a window seat to accommodate a family. The agent at the podium failed to mention that the family had a 3 month old baby and that a bassinet would be used during the 16 hour flight. The only way I could get out of my seat was to crawl under the bassinet of the sleeping baby. I think it is wrong that I was no given the choice to sit in another seat, that the agent knew what she was doing and chose to not properly disclose my seating arrangement. Terrible treatment.

they ran out of fruit for breakfast and so I just had a yogurt instead. other than that the flight was good

by the time they got to our row, they were out of some of the food options. games and movies were great but maybe more game options like tetris or pac man would be great

A few more inches of legroom is all i ask

Great as usual, some delays but well communicated and made up for in the air

Poor! This flight was delayed 14 hours. There was no assistance in helping customers find other routes to their destination, nor any other kind of support. It was a chaotic experience. I'm not likely to fly with AA going forward.

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.

We were upgraded and after just a short delay in attending to a safety check we were on our way. Would definately fly Qantas International on their Dreamliner again.

I tried to check in online but was unable to do so. I stood in line for nearly two hours to check in. American Airlines was understaffed. When I finally got to the kiosk to check in, I was still unable to check in. No AA staff was available to help. Finally one of the airport security agents who was helping passengers became of lack of AA Staff told me: “I think the reason you can’t check in is that you are starting your name with an upper case letter when you write it. Just write it with all lower case letters.” That did allow me to check in. HOW COULD ANYONE POSSIBLY KNOW THAT IF THEY USE AN INITIAL UPPER CASE LETTER TO SPELL THEIR OWN NAME, AA WOULD NOT ALLOW THEM TO CHECK IN?????? Then I had to wait in line over half an hour again to drop off my baggage. Although I arrived at the airport 3 hours early, by the time I got to the gate, they had already started boarding.

Any flight to ORD after about 2pm this summer has been challenging. Flight was delayed getting in (coming from ORD) and that led to it not leaving before a ground stop due to lightening before they could fuel the plane, and so forth. They made up some time but we were still late in arriving at ORD, and that led to missed connections.

Food was ok, but not as good as I have had before on AA.

Pretty good. The food was just mediocre, the boarding and crew were good.

Worst flight ever. I was suppose to have a 3 1/2 hour layover in Chicago but got to the gate 4 minutes before boarding.

My flight got switched and my prepaid bag didnt transfer over properly so I paid to check ANOTHER BAG. I was placed in a middle seat and it was just miserable. At least it was a bulkhead row so I had legroom. The flight just never seem3d to end

They should have MSNBC available on board. A 4- hour flight should provide more than a cookie.

Was not able to watch most shows on the entertainment site. They would not load

On Wednesday, July 30 we were in mid flight from Manchester to Charlotte and we turned around because the right engine was malfunctioning. That was the last flight out of Manchester that night. I was rebooked for Thursday, which became a weather event Friday. There were no seats left on the flight from Manchester to Charlotte. Consequently I didn’t leave Manchester until Saturday morning and we flew to Chicago so to say the least my scheduled flight and return to Iowa was three days off and it messed with my business schedule. Consequently cash flow. I would like some sort of acknowledgment of this event.

Dreadful experience. Our flight was delayed more than 8 hours due to a maintenance issue and the assistance from rebooking was poor. I was travelling with a bad knee and needed assistance waited in one place more than 3 hours before someone came with a wheelchair. The woman next to me was a 91 year old great grandmother who had waited more than 4 hours. There were moments of support from the staff but it appeared as they were going against the direction of management. It was apathy, lack of ownership and dismissive responses with small moments of kindness and understanding typically from grey haired, female, veteran staff..

Couldn’t get the door on the plane to close leading to a nearly 2 hour delay. But, hey at least they didn’t cancel the flight.

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