$132+ 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 31/1. 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
7 Feb — 14 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 8 January 2026.

Good round-trip deal

$258 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 8 January 2026.

Tue 27/118:40ORD - MEL
1 stop21h 50mQantas Airways
Wed 4/206:45MEL - ORD
2 stops25h 12mQantas Airways
Deal found 7/1$1,374
Wed 25/216:45ORD - MEL
2 stops31h 30mQantas Airways
Fri 6/312:00MEL - ORD
1 stop22h 46mQantas Airways
Deal found 6/1$1,376
Sun 18/118:40ORD - MEL
1 stop21h 50mQantas Airways
Sun 15/206:45MEL - ORD
2 stops25h 08mQantas Airways
Deal found 5/1$1,377
Fri 20/220:45ORD - MEL
1 stop43h 45mQantas Airways
Fri 27/206:45MEL - ORD
2 stops26h 52mQantas Airways
Deal found 5/1$1,383
Sat 21/221:21ORD - MEL
2 stops49h 14mQantas Airways
Sat 28/212:00MEL - ORD
1 stop28h 55mQantas Airways
Deal found 7/1$1,391
Sat 24/119:40ORD - SYD
1 stop41h 30mQantas Airways
Sat 31/107:05SYD - ORD
2 stops25h 52mQantas Airways
Deal found 6/1$1,404
Sat 7/316:49ORD - MEL
2 stops36h 56mQantas Airways
Thu 12/312:00MEL - ORD
1 stop21h 46mQantas Airways
Deal found 7/1$1,409
Wed 11/214:45STL - BNE
2 stops26h 00mMultiple Airlines
Thu 19/210:45BNE - STL
2 stops22h 13mMultiple Airlines
Deal found 7/1$1,409
Sat 21/316:49ORD - MEL
2 stops37h 56mQantas Airways
Wed 8/409:45MEL - ORD
1 stop23h 01mQantas Airways
Deal found 5/1$1,416
Mon 26/118:40ORD - SYD
1 stop21h 20mQantas Airways
Mon 9/219:15SYD - ORD
2 stops36h 42mQantas Airways
Deal found 6/1$1,417
Tue 27/114:15ORD - SYD
2 stops48h 20mQantas Airways
Mon 2/211:20SYD - ORD
1 stop22h 29mQantas Airways
Deal found 7/1$1,419
Sat 31/108:50ORD - BNE
1 stop28h 10mQantas Airways
Tue 10/218:30BNE - ORD
2 stops36h 27mQantas Airways
Deal found 6/1$1,420

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

Fly to

Sydney

Route

Depart

Return

Price

ChicagoMelbourne

ORD - MEL

ORDMEL

Chicago O'Hare Intl

Mon 2/2

18:40-09:30

1 stop21h 50m

Melbourne

Mon 9/2

06:45-14:57

2 stops25h 12m

$1,374

St. LouisBrisbane

STL - BNE

STLBNE

Lambert-St Louis

Wed 11/2

14:45-08:45

2 stops26h 00m

Brisbane

Thu 19/2

10:45-16:58

2 stops22h 13m

$1,409

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Sat 31/1

14:15-05:00

1 stop22h 45m

Brisbane

Wed 11/2

18:30-17:45

2 stops39h 15m

$1,420

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 24/2

08:41-08:45

2 stops32h 04m

Brisbane

Wed 11/3

09:45-17:05

2 stops46h 20m

$1,422

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 10/2

15:35-08:45

1 stop25h 10m

Brisbane

Sun 22/2

10:45-14:41

1 stop19h 56m

$1,422

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 24/2

19:29-17:15

2 stops29h 46m

Brisbane

Wed 11/3

19:40-23:47

1 stop19h 07m

$1,422

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Sun 22/2

15:35-08:45

1 stop25h 10m

Brisbane

Sun 1/3

10:45-14:41

1 stop19h 56m

$1,422

ChicagoBrisbane

ORD - BNE

ORDBNE

Chicago O'Hare Intl

Tue 2/6

19:35-07:05

1 stop20h 30m

Brisbane

Tue 16/6

10:00-14:45

1 stop19h 45m

$1,422

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 15/3

06:38-09:00

1 stop34h 22m

Sydney Kingsford Smith

Tue 24/3

17:50-15:28

2 stops37h 38m

$1,426

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sat 21/2

06:38-09:10

2 stops57h 32m

Sydney Kingsford Smith

Sat 28/2

11:20-23:59

1 stop29h 39m

$1,428

Flights are sorted by cheapest return flights first.

Deals found on 5/1

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 $294). Flying from Illinois in December will prove the most costly (average of $1,268). 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 $1,196
Spirit Airlines
Spirit Airlines
From $86
United Airlines
United Airlines
From $319

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 $173
San Diego
San Diego
From $194

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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 8 January 2026.

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

    The cheapest routes to Melbourne can be found at Chicago O'Hare Intl airport from $1,226. While Chicago Midway airport is usually cheaper if your destination is Sydney with prices starting at $1,333. Reference our flight search to find the best deals in real time.

  • 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 $1,226 round trip
    Fly from Chicago to Melbourne from $1,374 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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