Cheap Flights to Illinois

View AU$142 flight on Wed, 1 July 2026Opens in a new window

Popular airlines to Illinois

  • Delta

  • Frontier Airlines

  • American Airlines

  • United

  • Spirit Airlines

  • Alaska Airlines

  • 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.

Delta
Tue, 9 June - Tue, 23 June
LAX
Los Angeles
ORD
Chicago
AU$309 Return, found 9 hours ago
AU$309
Return
found 9 hours ago
Select Delta flight, departing Tue, 9 June from Los Angeles to Chicago, returning Tue, 23 June, priced at AU$309 found 9 hours ago
American Airlines
Mon, 11 May - Tue, 12 May
LAX
Los Angeles
ORD
Chicago
AU$313 Return, found 2 hours ago
AU$313
Return
found 2 hours ago
Select American Airlines flight, departing Mon, 11 May from Los Angeles to Chicago, returning Tue, 12 May, priced at AU$313 found 2 hours ago
Delta
Tue, 16 June - Tue, 30 June
LAX
Los Angeles
ORD
Chicago
AU$315 Return, found 6 days ago
AU$315
Return
found 6 days ago
Select Delta flight, departing Tue, 16 June from Los Angeles to Chicago, returning Tue, 30 June, priced at AU$315 found 6 days ago
American Airlines
Mon, 11 May - Wed, 3 June
LAX
Los Angeles
ORD
Chicago
AU$318 Return, found 3 days ago
AU$318
Return
found 3 days ago
Select American Airlines flight, departing Mon, 11 May from Los Angeles to Chicago, returning Wed, 3 June, priced at AU$318 found 3 days ago
American Airlines
Mon, 25 May - Tue, 26 May
LAX
Los Angeles
ORD
Chicago
AU$321 Return, found 5 days ago
AU$321
Return
found 5 days ago
Select American Airlines flight, departing Mon, 25 May from Los Angeles to Chicago, returning Tue, 26 May, priced at AU$321 found 5 days ago
Delta
Tue, 16 June - Tue, 30 June
LAX
Los Angeles
ORD
Chicago
AU$323 Return, found 9 hours ago
AU$323
Return
found 9 hours ago
Select Delta flight, departing Tue, 16 June from Los Angeles to Chicago, returning Tue, 30 June, priced at AU$323 found 9 hours ago
American Airlines
Mon, 11 May - Tue, 12 May
LAX
Los Angeles
ORD
Chicago
AU$326 Return, found 2 hours ago
AU$326
Return
found 2 hours ago
Select American Airlines flight, departing Mon, 11 May from Los Angeles to Chicago, returning Tue, 12 May, priced at AU$326 found 2 hours ago
United
Mon, 11 May - Tue, 12 May
LAX
Los Angeles
ORD
Chicago
AU$455 Return, found 2 hours ago
AU$455
Return
found 2 hours ago
Select United flight, departing Mon, 11 May from Los Angeles to Chicago, returning Tue, 12 May, priced at AU$455 found 2 hours ago
Alaska Airlines
Thu, 28 May - Sat, 6 June
LAX
Los Angeles
STL
St. Louis
AU$557 Return, found 1 day ago
AU$557
Return
found 1 day ago
Select Alaska Airlines flight, departing Thu, 28 May from Los Angeles to St. Louis, returning Sat, 6 June, priced at AU$557 found 1 day ago
Arajet
Thu, 1 Oct - Wed, 14 Oct
BOG
Bogotá
ORD
Chicago
AU$659 Return, found 1 day ago
AU$659
Return
found 1 day ago
Select Arajet flight, departing Thu, 1 Oct from Bogotá to Chicago, returning Wed, 14 Oct, priced at AU$659 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.

Air Canada
Thu, 4 June - Mon, 8 June
MEL
Melbourne
STL
St. Louis
AU$1,434 Return, found 5 hours ago
AU$1,434
Return
found 5 hours ago
Select Air Canada flight, departing Thu, 4 June from Melbourne to St. Louis, returning Mon, 8 June, priced at AU$1,434 found 5 hours 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$309. 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$309 and AU$1,434. Many lucky travellers nabbed one-way tickets from Los Angeles (LAX) for as little as AU$142.
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$309 to AU$1,434.
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.

Travel information

Illinois Flights Information

Airlines serving
American Airlines, Delta, Alaska Airlines, United, Arajet
Roundtrip price
from AU$309
Illinois Flights Information

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