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$165+ Cheap flights from Chicago

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/4. 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.
CHI — SYD
26 Feb — 5 Mar1
1 adult

What to know about flights from Chicago

Discover essential information about flights departing from Chicago, including flight schedules, destinations, airlines operating at the Chicago 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 21 February 2025.

Cheapest airline

Qantas Airways

Good round-trip deal

$170 or less

Good one-way deal

$116 or less
On average, Qantas Airways currently has the cheapest one-way flight from Chicago (avg. price of $1,634).
Price to beat on a round-trip flight from Chicago.
Price to beat on a one-way flight from Chicago.

Find flights from Chicago

Cheapest flights from Chicago
Explore the most affordable flight options available from Chicago. Find the lowest fares based on data from user searches, with prices last updated on 21 February 2025.

Fri 7/314:13ORD - BNE
1 stop22h 47mQantas Airways
Sat 15/308:05BNE - ORD
1 stop22h 08mQantas Airways
Deal found 19/2$1,264
Sat 8/320:20ORD - SYD
1 stop42h 05mQantas Airways
Tue 18/311:15SYD - ORD
1 stop20h 40mQantas Airways
Deal found 20/2$1,287
Sun 22/609:53ORD - BNE
1 stop28h 07mAmerican Airlines
Wed 2/722:00BNE - ORD
1 stop29h 33mAmerican Airlines
Deal found 20/2$1,289
Fri 18/408:25ORD - SYD
1 stop31h 10mBritish Airways
Wed 30/417:35SYD - ORD
1 stop26h 38mBritish Airways
Deal found 20/2$1,290
Tue 29/415:17ORD - SYD
1 stop24h 18mAmerican Airlines
Sun 11/517:35SYD - ORD
1 stop26h 35mAmerican Airlines
Deal found 21/2$1,293
Sat 2/819:40ORD - SYD
2 stops32h 35mMultiple Airlines
Sat 9/809:10SYD - ORD
1 stop21h 26mMultiple Airlines
Deal found 20/2$1,295
Fri 21/313:51ORD - MEL
2 stops23h 49mAmerican Airlines
Wed 2/408:00MEL - ORD
2 stops23h 13mAmerican Airlines
Deal found 20/2$1,337
Wed 26/215:17ORD - MEL
1 stop23h 18mQantas Airways
Tue 11/312:00MEL - ORD
1 stop27h 59mQantas Airways
Deal found 20/2$1,392
Wed 30/415:02MDW - SYD
2 stops24h 33mDelta
Sun 11/509:25SYD - MDW
2 stops24h 05mDelta
Deal found 21/2$1,450
Mon 10/312:15ORD - SYD
2 stops27h 30mDelta
Tue 18/310:05SYD - ORD
2 stops22h 10mDelta
Deal found 21/2$1,469
Sat 5/419:20ORD - BNE
2 stops58h 10mMultiple Airlines
Sat 12/406:30BNE - ORD
2 stops32h 29mMultiple Airlines
Deal found 20/2$1,474
Sat 15/320:20ORD - MEL
1 stop43h 15mMultiple Airlines
Mon 31/317:30MEL - ORD
2 stops38h 25mMultiple Airlines
Deal found 20/2$1,524

Find flights from Chicago within your budget

Find flights departing from Chicago 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 21 February 2025. In the last 7 days, Cheapflights users made a total of 647,157 searches

Fly to

Sydney

Route

Depart

Return

Price

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Fri 7/3

14:13-05:00

1 stop22h 47m

Brisbane

Sat 15/3

08:05-15:13

1 stop22h 08m

$1,264

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 8/3

20:20-07:25

1 stop42h 05m

Sydney Kingsford Smith

Tue 18/3

11:15-15:55

1 stop20h 40m

$1,287

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Sun 22/6

09:53-05:00

1 stop28h 07m

Brisbane

Wed 2/7

22:00-12:33

1 stop29h 33m

$1,289

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 8/3

18:45-06:35

1 stop42h 50m

Sydney Kingsford Smith

Sat 15/3

17:25-23:59

1 stop22h 34m

$1,292

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 29/4

10:34-06:35

2 stops29h 01m

Sydney Kingsford Smith

Sun 11/5

20:25-05:10

2 stops23h 45m

$1,293

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 2/8

19:40-19:15

2 stops32h 35m

Sydney Kingsford Smith

Sat 9/8

09:10-15:36

1 stop21h 26m

$1,295

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Fri 21/3

13:51-05:40

2 stops23h 49m

Melbourne

Wed 2/4

08:00-15:13

2 stops23h 13m

$1,337

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Wed 26/2

09:50-07:35

1 stop28h 45m

Melbourne

Mon 10/3

12:00-23:59

1 stop27h 59m

$1,392

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Wed 30/4

15:02-06:35

2 stops24h 33m

Sydney Kingsford Smith

Sun 11/5

09:25-18:30

2 stops24h 05m

$1,450

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 10/3

12:15-07:45

2 stops27h 30m

Sydney Kingsford Smith

Tue 18/3

10:05-16:15

2 stops22h 10m

$1,469

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Showing 1-10 of 60 results
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Best time to book a flight from Chicago

Have a flexible travel schedule? Discover the best time to fly from Chicago 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 Chicago

Get recent, data-driven insights about flights from Chicago including ideal travel times, pricing trends, and more.

When is the best time to book a flight from Chicago?

Use this chart to determine the optimal time to book a return flight from Chicago to Sydney. Price data was last updated on 14 February 2025.

The best time to book flights from Chicago is 82 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?

Currently, October is the cheapest month in which you can book a flight from Chicago (average of $1,198). Flying from Chicago in December will prove the most costly (average of $1,351). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

Airline reviews for flights from Chicago

Get insights into the airlines that provide service from Chicago. 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 Chicago. In the last 7 days, Cheapflights users made a total of 647,157 searches.

Food

7.8

Overall

8.7

Comfort

8.0

Crew

9.1

Entertainment

7.2

Boarding

8.7

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Food

7.8

Overall

8.7

Comfort

8.0

Crew

9.1

Entertainment

7.2

Boarding

8.7

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

8.4
Very Good

Food

7.8

Overall

8.7

Comfort

8.0

Crew

9.1

Entertainment

7.2

Boarding

8.7

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Food

7.8

Overall

8.7

Comfort

8.0

Crew

9.1

Entertainment

7.2

Boarding

8.7

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Food

7.8

Overall

8.7

Comfort

8.0

Crew

9.1

Entertainment

7.2

Boarding

8.7

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Food

7.8

Overall

8.7

Comfort

8.0

Crew

9.1

Entertainment

7.2

Boarding

8.7

Reviews

1 / 2

10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

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Direct flights from Illinois

Book a direct flight from one of these other cities located in Illinois.

Related info for your journey

Access useful and relevant information related to your journey from Chicago. 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 21 February 2025.
  • What are the most popular destinations to fly to from Chicago?

    For the current month, the most popular flights from Chicago are Atlanta, Mumbai, Ahmedabad. Atlanta, Boston, Athens are the most popular locations from Chicago year round.

  • Which is the cheapest airport to catch a flight from Chicago?

    The cheapest routes to Melbourne can be found at Chicago O'Hare Intl airport from $1,196. While Chicago Midway airport is usually cheaper if your destination is Sydney with prices starting at $1,469. Reference our flight search to find the best deals in real time.

  • What are the cheapest airlines flying from Chicago to anywhere?

    According to our data, users have found Spirit Airlines, Volaris, and Icelandair to have the cheapest round-trip prices from Chicago. Some of the destinations and prices are as follows: Spirit Airlines flights from Chicago to New York ($85). Volaris flights from Chicago to Mexico City Benito Juarez ($398). Icelandair flights from Chicago to Paris ($567).

  • What is the cheapest month to fly from Chicago?

    Currently, the cheapest month for flights from Chicago is October. The most expensive month for flights is December. 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?

    View the cheapest flight destinations from Chicago:
    Fly from Chicago to Sydney from $1,196 round trip
    Fly from Chicago to Melbourne from $1,250 round trip

  • How does Cheapflights help users find flights from Chicago?

    Cheapflights helps you search for flights from Chicago 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 Chicago?

    By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights from Chicago.

  • Can Cheapflights find flights from Chicago with no change fees?

    Yes! Cheapflights helps users easily find flights from Chicago with no change fees.

  • Can Cheapflights notify me if prices for flights from Chicago become cheaper?

    Yes! Start tracking prices for flights from Chicago today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive the alerts.

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Chicago?

Cheapflights helps you search for flights from Chicago 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 Chicago?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights from Chicago.

Can Cheapflights find flights from Chicago with no change fees?

Yes! Cheapflights helps users easily find flights from Chicago with no change fees.

Can Cheapflights notify me if prices for flights from Chicago become cheaper?

Yes! Start tracking prices for flights from Chicago today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive the alerts.

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