$112+ 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 11/3. 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
27 Feb — 6 Mar1
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 28 January 2026.

Good round-trip deal

$250 or less

Good one-way deal

$98 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 28 January 2026.

Wed 25/216:45
ORD
-
MEL
1 stop23h 45m
Qantas Airways
Wed 4/306:45
MEL
-
ORD
2 stops25h 08m
Qantas Airways
Deal found 26/1$1,343
Mon 23/213:24
ORD
-
MEL
1 stop27h 06m
Qantas Airways
Wed 4/306:45
MEL
-
ORD
2 stops25h 08m
Qantas Airways
Deal found 27/1$1,346
Tue 17/214:33
ORD
-
SYD
1 stop25h 27m
Qantas Airways
Wed 4/307:05
SYD
-
ORD
2 stops24h 48m
Qantas Airways
Deal found 27/1$1,356
Sat 7/218:40
ORD
-
MEL
2 stops27h 55m
Qantas Airways
Sat 21/212:00
MEL
-
ORD
1 stop26h 35m
Qantas Airways
Deal found 26/1$1,360
Sun 8/218:40
ORD
-
MEL
2 stops27h 55m
Qantas Airways
Sat 21/212:00
MEL
-
ORD
1 stop26h 35m
Qantas Airways
Deal found 27/1$1,362
Tue 24/215:35
ORD
-
BNE
1 stop25h 10m
Air Canada
Wed 11/309:45
BNE
-
ORD
1 stop19h 56m
Air Canada
Deal found 27/1$1,366
Sun 22/215:35
ORD
-
BNE
1 stop25h 10m
Air Canada
Wed 11/309:45
BNE
-
ORD
1 stop19h 56m
Air Canada
Deal found 27/1$1,369
Sat 21/316:49
ORD
-
MEL
2 stops32h 26m
Qantas Airways
Wed 8/409:45
MEL
-
ORD
1 stop22h 10m
Qantas Airways
Deal found 27/1$1,376
Sun 3/510:45
ORD
-
BNE
2 stops29h 20m
Air Canada
Sun 17/510:00
BNE
-
ORD
2 stops25h 08m
Air Canada
Deal found 26/1$1,376
Thu 19/316:49
ORD
-
MEL
2 stops32h 26m
Qantas Airways
Fri 10/409:45
MEL
-
ORD
1 stop26h 35m
Qantas Airways
Deal found 27/1$1,379
Tue 24/209:25
ORD
-
BNE
1 stop27h 35m
Qantas Airways
Tue 3/318:30
BNE
-
ORD
2 stops36h 23m
Qantas Airways
Deal found 25/1$1,379
Mon 13/408:42
ORD
-
BNE
2 stops31h 23m
Air Canada
Mon 20/410:00
BNE
-
ORD
2 stops46h 01m
Air Canada
Deal found 26/1$1,382

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 28 January 2026. 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

Sun 22/2

07:15-08:45

2 stops33h 30m

Brisbane

Wed 11/3

09:45-14:41

1 stop19h 56m

$1,373

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 24/2

07:15-08:45

2 stops33h 30m

Brisbane

Wed 11/3

09:45-17:48

2 stops23h 03m

$1,383

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Sat 28/2

14:08-17:10

2 stops35h 02m

Brisbane

Mon 9/3

19:40-23:47

1 stop19h 07m

$1,399

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 15/3

16:13-20:50

2 stops36h 37m

Sydney Kingsford Smith

Tue 24/3

11:20-23:58

1 stop28h 38m

$1,403

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Fri 27/2

16:45-07:30

2 stops46h 45m

Brisbane

Fri 6/3

19:40-14:53

1 stop35h 13m

$1,411

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 23/2

06:38-10:05

2 stops58h 27m

Sydney Kingsford Smith

Sat 28/2

17:45-23:59

1 stop23h 14m

$1,428

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Fri 1/5

08:45-07:05

2 stops31h 20m

Brisbane

Sun 10/5

10:00-20:08

2 stops25h 08m

$1,438

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Thu 28/5

19:42-07:05

2 stops44h 23m

Brisbane

Tue 9/6

10:00-13:07

2 stops42h 07m

$1,447

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Wed 25/2

06:38-09:00

1 stop33h 22m

Sydney Kingsford Smith

Wed 4/3

07:05-23:59

2 stops33h 54m

$1,448

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Sun 12/4

15:40-07:05

1 stop24h 25m

Brisbane

Sun 26/4

10:00-14:43

1 stop19h 43m

$1,470

Flights are sorted by cheapest return flights first.

Deals found on 26/1

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 $285). Flying from Illinois in December will prove the most costly (average of $1,229). 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 $673
Spirit Airlines
Spirit Airlines
From $83
United Airlines
United Airlines
From $309

What is the cheapest place to fly to from Illinois?

The cheapest city to fly to from Illinois is Toronto, with prices starting at $98. Explore other affordable destinations below.

Toronto
Toronto
From $98
Memphis
Memphis
From $168
Dallas/Fort Worth
Dallas/Fort Worth
From $176
San Diego
San Diego
From $188

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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 28 January 2026.

  • 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 $1,271 round trip
    Fly from Chicago to Melbourne from $1,330 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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