$166+ 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 28/5. 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
18 May — 25 May1
1 adult
1 adult, Economy, 0 bags

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 18 April 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

Fri 3/7

15:40-11:05

2 stops28h 25m

Melbourne

Sat 11/7

18:00-14:41

2 stops35h 41m

$1,972
Fastest return journey

St. LouisSydney

STL - SYD

STLSYD

Lambert-St Louis

Sun 31/5

19:23-06:55

1 stop20h 32m

Sydney Kingsford Smith

Sun 7/6

10:20-18:17

1 stop22h 57m

$1,975

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 29/6

15:47-07:00

1 stop24h 13m

Sydney Kingsford Smith

Tue 7/7

09:30-20:44

1 stop26h 14m

$1,976

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Sun 31/5

10:59-06:50

2 stops28h 51m

Sydney Kingsford Smith

Sun 7/6

09:15-18:18

2 stops24h 03m

$1,980

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 20/9

15:50-06:50

2 stops24h 00m

Sydney Kingsford Smith

Sun 27/9

09:15-20:24

2 stops26h 09m

$1,981

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Mon 29/6

11:23-06:50

2 stops28h 27m

Sydney Kingsford Smith

Tue 7/7

09:15-18:57

2 stops24h 42m

$1,981

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Mon 1/6

09:22-06:50

2 stops30h 28m

Sydney Kingsford Smith

Mon 15/6

09:15-18:18

2 stops24h 03m

$1,981

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Wed 8/7

13:49-06:50

2 stops26h 01m

Sydney Kingsford Smith

Wed 15/7

09:15-18:25

2 stops24h 10m

$1,981

ChicagoMelbourne

ORD - AVV

ORDAVV

Chicago O'Hare Intl

Sun 7/6

15:40-22:50

2 stops40h 10m

Melbourne Avalon

Tue 16/6

20:40-14:45

2 stops33h 05m

$2,001

ChicagoMelbourne

ORD - AVV

ORDAVV

Chicago O'Hare Intl

Sun 7/6

15:40-14:10

2 stops31h 30m

Melbourne Avalon

Sat 13/6

20:40-14:45

2 stops33h 05m

$2,030

Flights are sorted by cheapest return flights first.

Deals found on 13/4

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 $192). Flying from Illinois in July will prove the most costly (average of $1,177). 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 $1,137
Spirit Airlines
Spirit Airlines
From $81
United Airlines
United Airlines
From $299

What is the cheapest place to fly to from Illinois?

The cheapest city to fly to from Illinois is Toronto, with prices starting at $95. Explore other affordable destinations below.

Toronto
Toronto
From $95
Memphis
Memphis
From $162
Los Angeles Los Angeles
Los Angeles Los Angeles
From $232
Calgary
Calgary
From $243

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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 18 April 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 $1,345. While Chicago Midway airport is usually cheaper if your destination is Sydney with prices starting at $1,641. 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 July. 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 $1,345 round trip
    Fly from Chicago to Melbourne from $1,639 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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