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$151+ Cheap flights from Chicago O'Hare Intl Airport

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/12. 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.
ORD — SYD
14 Dec — 21 Dec1
1 adult
1 adult, Economy, 0 bags

What to know about flights from O'Hare Intl

Discover essential information about flights departing from O'Hare Intl, including flight schedules, destinations, airlines operating at the O'Hare Intl airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 14 November 2025.

Cheapest airline

Qantas Airways

Good round-trip deal

$540 or less

Good one-way deal

$144 or less
On average, Qantas Airways currently has the cheapest one-way flight from Chicago O'Hare Intl (avg. price of $1,326).
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Price to beat on a round-trip flight from Chicago O'Hare Intl.
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Price to beat on a one-way flight from Chicago O'Hare Intl.
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Cheapest flights from O'Hare Intl
Explore the most affordable flight options available from O'Hare Intl. Find the lowest fares based on data from user searches, with prices last updated on 14 November 2025.

Thu 4/1218:17ORD - SYD
1 stop21h 43mQantas Airways
Fri 27/207:05SYD - ORD
2 stops26h 34mQantas Airways
Deal found 13/11$1,347
Wed 25/219:39ORD - MEL
2 stops28h 36mQantas Airways
Sat 7/312:00MEL - ORD
1 stop22h 41mQantas Airways
Deal found 13/11$1,437
Wed 11/218:40ORD - SYD
1 stop21h 20mQantas Airways
Sat 28/207:05SYD - ORD
2 stops31h 28mQantas Airways
Deal found 12/11$1,450
Thu 4/1220:46ORD - MEL
1 stop39h 29mQantas Airways
Thu 11/1206:45MEL - ORD
2 stops28h 07mQantas Airways
Deal found 13/11$1,453
Thu 29/118:40ORD - BNE
2 stops30h 30mQantas Airways
Thu 12/219:40BNE - ORD
1 stop20h 01mQantas Airways
Deal found 13/11$1,477
Tue 10/218:40ORD - MEL
2 stops29h 35mQantas Airways
Sat 21/212:00MEL - ORD
1 stop28h 49mQantas Airways
Deal found 13/11$1,483
Sun 1/218:40ORD - SYD
2 stops30h 00mQantas Airways
Thu 12/211:20SYD - ORD
1 stop29h 21mQantas Airways
Deal found 12/11$1,483
Thu 4/1220:46ORD - MEL
1 stop39h 29mQantas Airways
Wed 14/118:30MEL - ORD
2 stops37h 27mQantas Airways
Deal found 12/11$1,485
Sun 30/1118:23ORD - SYD
1 stop21h 37mQantas Airways
Wed 10/1207:05SYD - ORD
2 stops25h 57mQantas Airways
Deal found 12/11$1,495
Fri 13/219:47ORD - SYD
2 stops42h 48mQantas Airways
Fri 27/211:20SYD - ORD
1 stop19h 45mQantas Airways
Deal found 13/11$1,497
Mon 2/314:00ORD - SYD
2 stops37h 50mQantas Airways
Sun 8/321:25SYD - ORD
1 stop29h 40mQantas Airways
Deal found 12/11$1,509
Tue 10/215:10ORD - SYD
2 stops33h 30mQantas Airways
Sun 28/609:10SYD - ORD
1 stop24h 40mQantas Airways
Deal found 13/11$1,534

Find flights from O'Hare Intl within your budget

 
Find flights departing from O'Hare Intl that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 14 November 2025. In the last 7 days, Cheapflights users made a total of 647,157 searches

Fly to

Sydney

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 2/3

14:00-20:50

2 stops37h 50m

Sydney Kingsford Smith

Sat 14/3

11:20-15:55

1 stop20h 35m

$1,483

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Sat 28/2

15:40-16:20

2 stops32h 10m

Adelaide

Mon 9/3

06:00-19:53

2 stops29h 23m

$1,711

ChicagoAdelaide

ORD - ADL

ORDADL

Chicago O'Hare Intl

Wed 25/2

15:40-18:10

2 stops34h 00m

Adelaide

Tue 31/3

18:55-14:43

2 stops35h 18m

$1,711

ChicagoPerth

ORD - PER

ORDPER

Chicago O'Hare Intl

Sun 8/2

13:10-17:50

2 stops38h 40m

Perth

Sun 22/2

20:25-07:35

2 stops49h 10m

$1,781

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Fri 13/2

11:16-14:25

2 stops34h 09m

Sydney Kingsford Smith

Wed 25/2

07:05-17:36

2 stops27h 31m

$1,799

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 10/2

18:40-17:40

2 stops30h 00m

Sydney Kingsford Smith

Wed 25/2

07:05-16:39

2 stops26h 34m

$1,889

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 8/2

18:40-17:40

2 stops30h 00m

Sydney Kingsford Smith

Sun 1/3

06:20-21:31

2 stops32h 11m

$1,889

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 10/2

18:40-17:40

2 stops30h 00m

Sydney Kingsford Smith

Fri 27/2

07:05-17:41

2 stops27h 36m

$1,889

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Wed 11/2

18:40-17:10

2 stops30h 30m

Brisbane

Sun 1/3

18:30-17:41

2 stops39h 11m

$1,906

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Thu 12/2

19:47-17:10

2 stops29h 23m

Brisbane

Sun 1/3

18:30-17:41

2 stops39h 11m

$1,906

Flights are sorted by cheapest return flights first.

Deals found on 12/11

Showing 1-10 of 60 results
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Best time to book a flight from O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly from O'Hare Intl with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from O'Hare Intl

Get recent, data-driven insights about flights from O'Hare Intl including ideal travel times, pricing trends, and more.

When is the best time to book a flight from Chicago O'Hare Intl Airport?

Use this chart to determine the optimal time to book a return flight from O'Hare Intl to Sydney. Price data was last updated on 7 November 2025.

The best time to book flights from Chicago O'Hare Intl Airport is 48 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport?

Currently, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport (average of $302). Flying from Chicago O'Hare Intl Airport in January will prove the most costly (average of $1,297). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

Which airlines fly from Chicago O'Hare Intl Airport?

When flying from Chicago O'Hare Intl Airport check dates and pricing for the following: Qantas Airways, American Airlines. As they depart for the following popular destinations: Sydney.

Qantas Airways
Qantas Airways
From $1,324
American Airlines
American Airlines
From $1,307

What are popular destinations to fly to from Chicago O'Hare Intl Airport?

Chicago O'Hare Intl Airport offers frequent flights to New York (1,424 flights per day), Detroit (928 flights per day) and Toronto (814 flights per day).

Los Angeles
Los Angeles
From $120
Vancouver Intl
Vancouver Intl
From $297
Memphis
Memphis
From $178

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

The cheapest city to fly to from Chicago O'Hare Intl Airport is Raleigh-Durham, with prices starting at $99. Explore other affordable destinations below.

Raleigh-Durham
Raleigh-Durham
From $99
Los Angeles
Los Angeles
From $120
Memphis
Memphis
From $178
San Diego
San Diego
From $199

Airline reviews for flights from O'Hare Intl

Get insights into the airlines that provide service from O'Hare Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing airline for your flight from O'Hare Intl. In the last 7 days, Cheapflights users made a total of 647,157 searches.
Check out reviews from past customers who have flown Qantas Airways and American Airlines from Chicago O'Hare Intl Airport to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Qantas Airways
7.5
Good
934 reviews
Check prices

Boarding

7.7

Comfort

7.5

Food

7.0

Overall

7.5

Entertainment

7.2

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.
Qantas Airways
7.5
Good
934 reviews
Qantas Airways
7.5
Good
934 reviews
Check prices

Boarding

7.7

Comfort

7.5

Food

7.0

Overall

7.5

Entertainment

7.2

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.
American Airlines
7.2
Good
11,051 reviews
Qantas Airways
7.5
Good
934 reviews
Check prices

Boarding

7.7

Comfort

7.5

Food

7.0

Overall

7.5

Entertainment

7.2

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Carol,Oct 2025

ADL - MEL

Smooth flight, good onboard staff who were very caring when I didn’t feel very well.

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Alternate flight departure points to O'Hare Intl

Consider leaving from one of these other departure points that are located a short distance from O'Hare Intl. Flight origins were last updated on 14 November 2025.
Flights from St. Louis
Flights from Evansville
Flights from Belleville
Flights from Bloomington
Flights from Peoria
Flights from Midway
Flights from Moline
Flights from Springfield

Related info for your journey

Access useful and relevant information related to your journey from O'Hare Intl. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 14 November 2025.

  • What are the most popular destinations to fly to from Chicago O'Hare Intl Airport?

    For the current month, the most popular flights from Chicago O'Hare Intl Airport are Ahmedabad, Mumbai, Bangkok Suvarnabhumi Airport. Ahmedabad, Mumbai, Athens are the most popular locations from Chicago O'Hare Intl Airport year round.

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

    Users have flown out of Chicago O'Hare Intl Airport for as low as $99 to Raleigh (prices may vary depending on the airline and departure time). On average, users have booked flights for $705 to fly from Chicago O'Hare Intl Airport.

  • What is the cheapest premium economy flight from Chicago O'Hare Intl Airport?

    Options for some of the cheapest premium economy flights from Chicago O'Hare Intl Airport we have found on Cheapflights are as follows:
    Fly from Chicago O'Hare Intl to New York LaGuardia Airport starting at $642
    Fly from Chicago O'Hare Intl to Harrisburg starting at $780
    Fly from Chicago O'Hare Intl to Toronto Pearson Intl Airport starting at $1,838
    Fly from Chicago O'Hare Intl to Tokyo Haneda Airport starting at $3,185

  • What is the cheapest first class flight from Chicago O'Hare Intl Airport?

    If you’re looking to fly first-class from Chicago O'Hare Intl Airport to anywhere, put New York on your list as prices start at $838 for this destination.

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

    Currently, the cheapest month for flights from Chicago O'Hare Intl Airport is August. The most expensive month for flights is January. The cheapest prices are shown above but prices will vary according to departure times, airlines, class and how early you book.

  • Where are the cheapest places to fly to from Chicago O'Hare Intl Airport?

    View the cheapest flight destinations from Chicago O'Hare Intl Airport:
    Fly from Chicago to Sydney from $1,347 round trip
    Fly from Chicago to Melbourne from $1,437 round trip

  • How does Cheapflights help users find flights from O'Hare Intl?

    Cheapflights helps you search for flights from O'Hare Intl via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

  • Why should you use Cheapflights to find cheap flight tickets from O'Hare Intl?

    Cheapflights helps you find that perfect flight from O'Hare Intl by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

  • Can Cheapflights find flights from O'Hare Intl with no change fees?

    Users can book flights with no change fees policies with our dedicated filters. Book flights from O'Hare Intl flexibly with Cheapflights today.

  • Can Cheapflights notify me if prices for flights from O'Hare Intl become cheaper?

    Of course! You can now track prices for flights from O'Hare Intl and get an alert from Cheapflights when they change. Click the bell icon next to the flight deals above and provide your email address to set up price alerts.

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Cheapflights helps you search for flights from O'Hare Intl via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from O'Hare Intl?

Cheapflights helps you find that perfect flight from O'Hare Intl by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from O'Hare Intl with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from O'Hare Intl flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from O'Hare Intl become cheaper?

Of course! You can now track prices for flights from O'Hare Intl and get an alert from Cheapflights when they change. Click the bell icon next to the flight deals above and provide your email address to set up price alerts.

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