Cheap Flights to Illinois

View AU$838 flight on Wed, 29 July 2026Opens in a new window

Popular airlines to Illinois

  • Delta

  • Frontier Airlines

  • American Airlines

  • United

  • Alaska Airlines

  • JetBlue Airways

  • Southwest Airlines

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Cheapest Flights to Illinois

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, 1 June - Mon, 22 June
MEL
Melbourne
ORD
Chicago
AU$1,336 Return, found 4 hours ago
AU$1,336
Return
found 4 hours ago
Select American Airlines flight, departing Mon, 1 June from Melbourne to Chicago, returning Mon, 22 June, priced at AU$1,336 found 4 hours ago
Qantas Airways
Thu, 28 May - Thu, 4 June
MEL
Melbourne
ORD
Chicago
AU$1,337 Return, found 11 hours ago
AU$1,337
Return
found 11 hours ago
Select Qantas Airways flight, departing Thu, 28 May from Melbourne to Chicago, returning Thu, 4 June, priced at AU$1,337 found 11 hours ago
United
Wed, 29 July - Fri, 14 Aug
MEL
Melbourne
MLI
Moline
AU$1,351 Return, found 2 hours ago
AU$1,351
Return
found 2 hours ago
Select United flight, departing Wed, 29 July from Melbourne to Moline, returning Fri, 14 Aug, priced at AU$1,351 found 2 hours ago
United
Sat, 1 Aug - Thu, 27 Aug
MEL
Melbourne
ORD
Chicago
AU$1,351 Return, found 4 hours ago
AU$1,351
Return
found 4 hours ago
Select United flight, departing Sat, 1 Aug from Melbourne to Chicago, returning Thu, 27 Aug, priced at AU$1,351 found 4 hours ago
United
Wed, 10 June - Wed, 24 June
MEL
Melbourne
STL
St. Louis
AU$1,352 Return, found 1 day ago
AU$1,352
Return
found 1 day ago
Select United flight, departing Wed, 10 June from Melbourne to St. Louis, returning Wed, 24 June, priced at AU$1,352 found 1 day ago
Delta
Fri, 21 Aug - Fri, 28 Aug
MEL
Melbourne
ORD
Chicago
AU$1,362 Return, found 1 day ago
AU$1,362
Return
found 1 day ago
Select Delta flight, departing Fri, 21 Aug from Melbourne to Chicago, returning Fri, 28 Aug, priced at AU$1,362 found 1 day ago
American Airlines
Tue, 4 Aug - Wed, 9 Sept
SYD
Sydney
STL
St. Louis
AU$1,416 Return, found 6 days ago
AU$1,416
Return
found 6 days ago
Select American Airlines flight, departing Tue, 4 Aug from Sydney to St. Louis, returning Wed, 9 Sept, priced at AU$1,416 found 6 days ago
American Airlines
Mon, 2 Nov - Mon, 9 Nov
SYD
Sydney
ORD
Chicago
AU$1,426 Return, found 6 days ago
AU$1,426
Return
found 6 days ago
Select American Airlines flight, departing Mon, 2 Nov from Sydney to Chicago, returning Mon, 9 Nov, priced at AU$1,426 found 6 days ago
United
Thu, 18 June - Sat, 27 June
SYD
Sydney
PIA
Peoria
AU$1,442 Return, found 6 days ago
AU$1,442
Return
found 6 days ago
Select United flight, departing Thu, 18 June from Sydney to Peoria, returning Sat, 27 June, priced at AU$1,442 found 6 days ago
Air Canada
Thu, 4 June - Sun, 7 June
SYD
Sydney
STL
St. Louis
AU$1,489 Return, found 1 day ago
AU$1,489
Return
found 1 day ago
Select Air Canada flight, departing Thu, 4 June from Sydney to St. Louis, returning Sun, 7 June, priced at AU$1,489 found 1 day ago

Trending flights to Illinois

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, 4 Aug - Wed, 9 Sept
SYD
Sydney
STL
St. Louis
AU$1,416 Return, found 6 days ago
AU$1,416
Return
found 6 days ago
Select American Airlines flight, departing Tue, 4 Aug from Sydney to St. Louis, returning Wed, 9 Sept, priced at AU$1,416 found 6 days ago

Frequently asked questions

How do I find cheap flights to Illinois that have flexible change policies?
Search for cheap flights to Illinois, then tick the "No change fee" box under the "Flexible change policies" heading. From then on it's smooth sailing. We understand that travel plans change and flexibility is essential, so book with confidence with Expedia.
Which airlines fly to Illinois?
Whether you're travelling somewhere new or rendezvousing at a favourite haunt, these airlines are waiting to take you into or near Illinois:

  • United Airlines - 13 063 flights to or near Illinois each month, including 12 950 flights to O'Hare Intl. Airport (ORD) and 108 flights to Quad City Intl. Airport (MLI) per month.
  • American Airlines - 8 977 flights to or near Illinois each month, including 8 855 flights to O'Hare Intl. Airport (ORD) and 121 flights to Quad City Intl. Airport (MLI) per month.
  • Southwest Airlines - 5 997 flights to or near Illinois each month, including 5 334 flights to Midway Intl. Airport (MDW) and 663 flights to O'Hare Intl. Airport (ORD) per month.

How can I find cheap tickets to Illinois?
One of the easiest ways to find cheap tickets to Illinois is to be flexible with your travel dates. Search for your flights, then click "flexible dates" at the top of your results. It'll reveal the cheapest prices for nearby days. The lowest price for a flight to Illinois in the last seven days was AU$1,336. Booking well in advance will generally help you score an even bigger bargain.
How much is a flight to Illinois?
There were plenty of bargain fares up for grabs in the last seven days, with the cost of a return airfare to Illinois ranging between AU$1,336 and AU$1,489. Many lucky travellers nabbed one-way tickets from Melbourne (MEL) for as little as AU$838.
What are the most popular airports to fly into in Illinois?
Touch down at one of these top Illinois airports and you'll be perfectly placed to discover all that this wonderful region has to offer:

  • O'Hare Intl. Airport (ORD) - 25 318 flights per month.
  • Midway Intl. Airport (MDW) - 5 962 flights per month.
  • Quad City Intl. Airport (MLI) - 325 flights per month.

When is the cheapest time to fly to Illinois?
Take off for Illinois early in the week and you'll usually be rewarded more economical fares. Tuesday is typically the cheapest day to hop on a plane, followed by Monday. If you're hoping to avoid the most expensive flights, steer clear of Saturdays.
How much is a plane ticket to Illinois?
In the last seven days, plane fares to Illinois ranged from AU$1,336 to AU$1,489.
What is the best time to go to Illinois?
A terrific time to check out Chicago is after June 20 when the summer season starts. In Illinois's main city, average temperatures range from 18ºC to 24ºC at this time — ideal weather for sightseeing! May, June and August are the most popular months to head to this hot spot.
What months are the cheapest to book a flight to Illinois?
The top month to purchase affordable flights to Illinois is February. Remember that in the U.S, an expensive time to reserve a ticket is during the busy month of December.

Book with confidence

Illinois Flights

When was the last time you embarked on a grand adventure? Whether it was last month or years ago, there’s never been a better time to start planning your next big trip. Book tickets to Illinois today and get ready to build your travel itinerary, from exploring the area with your family to recharging in the change of scenery. During your stay, visit the must-see attractions, chow down on the local cuisine, and relish in a holiday state of mind. However you decide to spend your upcoming trip, we’re here to make your travel plans easy and affordable.

Book Your Illinois Airfare

At Expedia.com.au, it’s simple to find cheap flights to Illinois that won’t cause your wallet to flinch. Browse through our inventory of Illinois flights and find airfare matching your preferred times and dates. Looking for a red-eye flight or an afternoon departure? Don’t worry, we’ve got you covered. You can even take advantage of our convenient My Scratchpad online feature, which lets you track your search results with ease. No more excuses; book your travel arrangements with us today to make your dream trip a reality.

Illinois Flights

Travel information

Illinois Flights Information

Airlines serving
United, Delta, American Airlines, Air Canada, Qantas Airways
Roundtrip price
from AU$1,336
Illinois Flights Information

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