$134+ Cheap flights from Illinois

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/2. 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
25 Jan — 1 Feb1
1 adult
1 adult, Economy, 0 bags

What to know about flights from Illinois

Discover essential information about flights departing from Illinois, including flight schedules, destinations, airlines operating at the Illinois 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 26 December 2025.

Good round-trip deal

$259 or less

Good one-way deal

$101 or less
Price to beat on a round-trip flight from Illinois.
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Price to beat on a one-way flight from Illinois.
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Find flights from Illinois

Enter your travel dates to find the best prices.

Cheapest flights from Illinois
Explore the most affordable flight options available from Illinois. Find the lowest fares based on data from user searches, with prices last updated on 26 December 2025.

Wed 11/215:10ORD - SYD
1 stop24h 50mQantas Airways
Wed 4/307:05SYD - ORD
2 stops26h 33mQantas Airways
Deal found 24/12$1,285
Mon 9/214:15ORD - SYD
1 stop25h 45mQantas Airways
Mon 2/319:15SYD - ORD
2 stops38h 23mQantas Airways
Deal found 25/12$1,318
Sun 25/118:40ORD - SYD
1 stop21h 20mQantas Airways
Sat 7/207:05SYD - ORD
2 stops25h 52mQantas Airways
Deal found 24/12$1,342
Tue 10/218:40ORD - SYD
1 stop21h 20mQantas Airways
Wed 25/207:05SYD - ORD
2 stops26h 33mQantas Airways
Deal found 24/12$1,367
Sun 8/207:04STL - SYD
1 stop32h 56mQantas Airways
Sun 15/207:05SYD - STL
2 stops33h 43mQantas Airways
Deal found 25/12$1,369
Sat 17/119:12ORD - SYD
1 stop41h 58mQantas Airways
Sun 8/207:05SYD - ORD
2 stops24h 52mQantas Airways
Deal found 24/12$1,377
Sat 24/119:40ORD - SYD
1 stop41h 30mQantas Airways
Sat 31/107:05SYD - ORD
2 stops25h 52mQantas Airways
Deal found 25/12$1,379
Mon 2/218:40ORD - MEL
2 stops29h 35mQantas Airways
Wed 11/212:00MEL - ORD
1 stop24h 00mQantas Airways
Deal found 25/12$1,383
Wed 21/118:40ORD - MEL
2 stops44h 40mQantas Airways
Mon 2/212:00MEL - ORD
1 stop24h 53mQantas Airways
Deal found 25/12$1,391
Wed 21/118:40ORD - BNE
2 stops44h 50mQantas Airways
Fri 30/119:40BNE - ORD
1 stop20h 19mQantas Airways
Deal found 24/12$1,394
Sat 28/219:47ORD - BNE
2 stops29h 23mQantas Airways
Mon 9/319:40BNE - ORD
1 stop36h 04mQantas Airways
Deal found 25/12$1,395
Sat 24/118:40ORD - BNE
2 stops44h 50mQantas Airways
Sun 1/212:10BNE - ORD
1 stop20h 39mQantas Airways
Deal found 25/12$1,397

Find flights from Illinois within your budget

 
Find flights departing from Illinois 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 26 December 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

Tue 20/1

15:10-07:25

1 stop23h 15m

Sydney Kingsford Smith

Fri 20/2

07:05-16:38

2 stops26h 33m

$1,379

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 20/1

15:10-17:10

2 stops34h 00m

Brisbane

Tue 27/1

12:10-14:57

1 stop18h 47m

$1,394

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Wed 18/2

16:30-05:00

1 stop20h 30m

Brisbane

Wed 25/2

18:30-16:38

2 stops38h 08m

$1,395

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Thu 5/2

18:40-17:40

2 stops30h 00m

Sydney Kingsford Smith

Sun 22/2

21:25-12:22

1 stop31h 57m

$1,413

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 20/1

15:10-07:25

1 stop23h 15m

Sydney Kingsford Smith

Sat 24/1

19:15-16:49

2 stops38h 34m

$1,413

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 20/1

08:45-08:45

2 stops32h 00m

Brisbane

Tue 27/1

10:45-17:08

2 stops46h 23m

$1,425

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Sun 17/5

15:40-07:05

1 stop24h 25m

Brisbane

Sun 24/5

10:00-12:50

2 stops41h 50m

$1,427

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 7/4

15:40-07:05

1 stop24h 25m

Brisbane

Tue 14/4

10:00-14:43

1 stop19h 43m

$1,427

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 1/3

19:47-20:50

2 stops32h 03m

Sydney Kingsford Smith

Sat 14/3

11:20-14:52

1 stop19h 32m

$1,428

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 10/2

15:35-08:45

1 stop25h 10m

Brisbane

Sun 22/2

10:45-20:10

2 stops25h 25m

$1,430

Flights are sorted by cheapest return flights first.

Deals found on 23/12

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

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

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

What is the cheapest month to book a flight from Illinois?

Currently, August is the cheapest month in which you can book a flight from Illinois (average of $295). Flying from Illinois in December will prove the most costly (average of $1,269). 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 Illinois?

When flying from Illinois check dates and pricing for the following: Qantas Airways. As it departs for the following popular destinations: Sydney.

Qantas Airways
Qantas Airways
From $1,201
Spirit Airlines
Spirit Airlines
From $86
United Airlines
United Airlines
From $320

What is the cheapest place to fly to from Illinois?

The cheapest city to fly to from Illinois is Toronto, with prices starting at $101. Explore other affordable destinations below.

Toronto
Toronto
From $101
Los Angeles
Los Angeles
From $119
Memphis
Memphis
From $174
San Diego
San Diego
From $195

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Direct flights from USA

Book a direct flight from one of these other cities located in USA.
Direct flights from Moline

Related info for your journey

Access useful and relevant information related to your journey from Illinois. 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 26 December 2025.

  • What is the cheapest month to fly from Illinois?

    Currently, the cheapest month for flights from Illinois is August. 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 Illinois?

    View the cheapest flight destinations from Illinois:
    Fly from Chicago to Sydney from $1,266 round trip
    Fly from Chicago to Melbourne from $1,383 round trip

  • How does Cheapflights help users find flights from Illinois?

    Deals for flights from Illinois are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose to your preference, such as price, airport, cabin class, and plenty of other options.

  • Why should you use Cheapflights to find cheap flight tickets from Illinois?

    Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Illinois for you. Better yet — we are completely free to use.

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

    Users can book flights with no change fees policies with our dedicated filters. Book flights from Illinois flexibly with Cheapflights today.

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

    Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and use a valid email address to enable the Price Alerts feature. That’s it!

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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 Illinois?

Deals for flights from Illinois are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose to your preference, such as price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Illinois?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Illinois for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Illinois with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Illinois flexibly with Cheapflights today.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and use a valid email address to enable the Price Alerts feature. That’s it!

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