$127+ 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 13/4. 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.
ORD — SYD
10 Apr — 17 Apr1
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 11 March 2026.

Good round-trip deal

$245 or less

Good one-way deal

$96 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 11 March 2026.

Sun 19/405:15
ORD
-
BNE
2 stops38h 20m
Multiple Airlines
Fri 24/411:35
BNE
-
ORD
2 stops26h 52m
Multiple Airlines
Deal found 6/3$1,183
Sun 3/505:15
ORD
-
MEL
2 stops40h 10m
Multiple Airlines
Wed 13/513:25
MEL
-
ORD
2 stops25h 02m
Multiple Airlines
Deal found 9/3$1,231
Sun 19/405:15
ORD
-
MEL
2 stops40h 10m
Multiple Airlines
Sun 3/513:30
MEL
-
ORD
2 stops31h 05m
Multiple Airlines
Deal found 5/3$1,256
Sun 19/414:00
ORD
-
BNE
2 stops29h 35m
Multiple Airlines
Sun 26/411:35
BNE
-
ORD
2 stops33h 00m
Multiple Airlines
Deal found 9/3$1,261
Sun 3/515:40
ORD
-
BNE
1 stop24h 25m
Multiple Airlines
Mon 11/510:00
BNE
-
ORD
2 stops34h 25m
Multiple Airlines
Deal found 9/3$1,292
Sun 3/515:40
ORD
-
BNE
1 stop24h 25m
Air Canada
Mon 11/510:00
BNE
-
ORD
1 stop19h 45m
Air Canada
Deal found 9/3$1,293
Sun 5/415:40
ORD
-
BNE
1 stop24h 25m
Air Canada
Tue 21/410:00
BNE
-
ORD
1 stop19h 45m
Air Canada
Deal found 7/3$1,294
Tue 2/608:40
ORD
-
BNE
2 stops31h 25m
Air Canada
Tue 16/610:15
BNE
-
ORD
2 stops36h 35m
Air Canada
Deal found 10/3$1,311
Tue 21/407:30
ORD
-
MEL
2 stops37h 30m
Multiple Airlines
Tue 28/413:25
MEL
-
ORD
2 stops25h 02m
Multiple Airlines
Deal found 10/3$1,315
Mon 20/405:15
ORD
-
MEL
2 stops40h 10m
Multiple Airlines
Mon 27/413:30
MEL
-
ORD
2 stops24h 57m
Multiple Airlines
Deal found 6/3$1,346
Mon 20/405:15
ORD
-
SYD
2 stops39h 50m
Multiple Airlines
Mon 27/413:15
SYD
-
ORD
2 stops25h 12m
Multiple Airlines
Deal found 6/3$1,359
Tue 5/507:30
ORD
-
SYD
2 stops37h 20m
Multiple Airlines
Tue 12/506:00
SYD
-
ORD
2 stops32h 27m
Multiple Airlines
Deal found 8/3$1,372

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 11 March 2026. In the last 7 days, Cheapflights users made a total of 647,157 searches

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Mon 20/4

05:15-12:25

2 stops40h 10m

Melbourne

Mon 27/4

13:30-23:27

2 stops24h 57m

$1,346

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Sat 4/4

08:42-07:05

2 stops31h 23m

Brisbane

Sun 19/4

20:45-14:45

2 stops33h 00m

$1,393

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Thu 23/4

18:01-07:05

2 stops46h 04m

Brisbane

Mon 27/4

10:00-14:45

1 stop19h 45m

$1,609

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sat 8/8

13:38-08:15

2 stops27h 37m

Melbourne

Wed 12/8

10:55-20:39

2 stops24h 44m

$1,656

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Fri 3/4

16:49-08:30

2 stops23h 41m

Melbourne

Sun 19/4

10:55-21:13

2 stops25h 18m

$1,656

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 4/5

13:46-06:50

2 stops26h 04m

Sydney Kingsford Smith

Mon 18/5

09:15-21:09

2 stops26h 54m

$1,687

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 30/4

06:21-09:20

2 stops35h 59m

Sydney Kingsford Smith

Mon 4/5

12:00-17:21

1 stop20h 21m

$1,688

St. LouisMelbourne

STL - MEL

STLMEL

Lambert-St Louis

Sat 8/8

15:33-05:00

1 stop22h 27m

Melbourne

Wed 12/8

09:45-23:08

1 stop28h 23m

$1,708

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Thu 7/5

14:35-06:55

2 stops25h 20m

Sydney Kingsford Smith

Tue 12/5

10:20-18:22

1 stop23h 02m

$1,738

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Mon 20/4

06:21-07:05

1 stop33h 44m

Sydney Kingsford Smith

Mon 27/4

09:10-23:57

1 stop29h 47m

$1,747

Flights are sorted by cheapest return flights first.

Deals found on 8/3

Showing 1-10 of 60 resultsSorted by cheapest first
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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 $279). Flying from Illinois in October will prove the most costly (average of $1,263). 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 $656
Spirit Airlines
Spirit Airlines
From $81
United Airlines
United Airlines
From $302

What is the cheapest place to fly to from Illinois?

The cheapest city to fly to from Illinois is Toronto, with prices starting at $96. Explore other affordable destinations below.

Toronto
Toronto
From $96
New York
New York
From $119
Memphis
Memphis
From $164
Orlando
Orlando
From $205

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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 11 March 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 October. 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 $1,189 round trip
    Fly from Chicago to Melbourne from $1,207 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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