Cheap flights to Illinois

View €395 flight on Wed, 2 Sept 2026Opens in a new window

Popular airlines to Illinois

  • Delta

  • Frontier Airlines

  • American Airlines

  • United

  • Southwest Airlines

  • Spirit Airlines

  • Alaska Airlines

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Cheap round-trip flights to Illinois

Prices were available within the past 7 days and start at €395 for one-way flights and €553 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Wed, 11 Nov - Sun, 15 Nov
SNN
Shannon
ORD
Chicago
€553 Return, found 4 days ago
€553
Return
found 4 days ago
Select British Airways flight, departing Wed, 11 Nov from Shannon to Chicago, returning Sun, 15 Nov, priced at €553 found 4 days ago
British Airways
Fri, 20 Nov - Wed, 25 Nov
SNN
Shannon
ORD
Chicago
€569 Return, found 3 days ago
€569
Return
found 3 days ago
Select British Airways flight, departing Fri, 20 Nov from Shannon to Chicago, returning Wed, 25 Nov, priced at €569 found 3 days ago
British Airways
Fri, 20 Nov - Wed, 25 Nov
SNN
Shannon
ORD
Chicago
€574 Return, found 3 days ago
€574
Return
found 3 days ago
Select British Airways flight, departing Fri, 20 Nov from Shannon to Chicago, returning Wed, 25 Nov, priced at €574 found 3 days ago
British Airways
Wed, 14 Oct - Tue, 20 Oct
SNN
Shannon
ORD
Chicago
€598 Return, found 5 days ago
€598
Return
found 5 days ago
Select British Airways flight, departing Wed, 14 Oct from Shannon to Chicago, returning Tue, 20 Oct, priced at €598 found 5 days ago
British Airways
Wed, 25 Nov - Sun, 29 Nov
SNN
Shannon
ORD
Chicago
€608 Return, found 6 days ago
€608
Return
found 6 days ago
Select British Airways flight, departing Wed, 25 Nov from Shannon to Chicago, returning Sun, 29 Nov, priced at €608 found 6 days ago
British Airways
Wed, 25 Nov - Sun, 29 Nov
SNN
Shannon
ORD
Chicago
€613 Return, found 6 days ago
€613
Return
found 6 days ago
Select British Airways flight, departing Wed, 25 Nov from Shannon to Chicago, returning Sun, 29 Nov, priced at €613 found 6 days ago
Aer Lingus
Wed, 11 Nov - Sun, 15 Nov
SNN
Shannon
ORD
Chicago
€653 Return, found 4 days ago
€653
Return
found 4 days ago
Select Aer Lingus flight, departing Wed, 11 Nov from Shannon to Chicago, returning Sun, 15 Nov, priced at €653 found 4 days ago
Delta
Tue, 9 Jun - Tue, 23 Jun
SNN
Shannon
ORD
Chicago
€654 Return, found 2 hours ago
€654
Return
found 2 hours ago
Select Delta flight, departing Tue, 9 Jun from Shannon to Chicago, returning Tue, 23 Jun, priced at €654 found 2 hours ago
Lufthansa
Thu, 17 Sept - Tue, 22 Sept
SNN
Shannon
ORD
Chicago
€666 Return, found 2 days ago
€666
Return
found 2 days ago
Select Lufthansa flight, departing Thu, 17 Sept from Shannon to Chicago, returning Tue, 22 Sept, priced at €666 found 2 days ago
United
Fri, 22 May - Thu, 28 May
SNN
Shannon
ORD
Chicago
€688 Return, found 6 days ago
€688
Return
found 6 days ago
Select United flight, departing Fri, 22 May from Shannon to Chicago, returning Thu, 28 May, priced at €688 found 6 days 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.

British Airways
Wed, 11 Nov - Sun, 15 Nov
SNN
Shannon
ORD
Chicago
€553 Return, found 4 days ago
€553
Return
found 4 days ago
Select British Airways flight, departing Wed, 11 Nov from Shannon to Chicago, returning Sun, 15 Nov, priced at €553 found 4 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 €553. 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 €553 and €688. Many lucky travellers nabbed one-way tickets from Shannon (SNN) for as little as €395.
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.

How much is a plane ticket to Illinois?
In the last seven days, plane fares to Illinois ranged from €553 to €688.
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

About Illinois

Expedia offers flights to Illinois to meet every traveller's needs. Whatever your flight need - Expedia has the flight for you. So choose from flights to Illinois or destinations around the world and discover how easy it is to make your flight reservations on Expedia.
About Illinois

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