Flight Destinations in Illinois

View ฿19,475 flight on Thu, 21 May 2026Opens in a new window

Popular airlines to Illinois

  • Delta

  • Frontier Airlines

  • American Airlines

  • United

  • Southwest Airlines

  • Spirit Airlines

  • Alaska Airlines

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 40% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to Illinois

Prices were available within the past 7 days and start at ฿19,475 for one-way flights and ฿31,305 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, 11 May - Wed, 2 Sept
BKK
Bangkok
MDW
Chicago
฿31,305 Return, found 5 days ago
฿31,305
Return
found 5 days ago
Select Delta flight, departing Mon, 11 May from Bangkok to Chicago, returning Wed, 2 Sept, priced at ฿31,305 found 5 days ago
China Airlines
Sun, 4 Oct - Sat, 17 Oct
BKK
Bangkok
ORD
Chicago
฿31,375 Return, just found
฿31,375
Return
just found
Select China Airlines flight, departing Sun, 4 Oct from Bangkok to Chicago, returning Sat, 17 Oct, priced at ฿31,375 just found
Delta
Fri, 12 Jun - Fri, 3 Jul
HKT
Phuket
ORD
Chicago
฿31,455 Return, found 2 hours ago
฿31,455
Return
found 2 hours ago
Select Delta flight, departing Fri, 12 Jun from Phuket to Chicago, returning Fri, 3 Jul, priced at ฿31,455 found 2 hours ago
Korean Air
Tue, 19 May - Fri, 14 Aug
BKK
Bangkok
ORD
Chicago
฿31,865 Return, found 2 days ago
฿31,865
Return
found 2 days ago
Select Korean Air flight, departing Tue, 19 May from Bangkok to Chicago, returning Fri, 14 Aug, priced at ฿31,865 found 2 days ago
Air Canada
Tue, 17 Nov - Mon, 23 Nov
BKK
Bangkok
ORD
Chicago
฿32,050 Return, found 16 hours ago
฿32,050
Return
found 16 hours ago
Select Air Canada flight, departing Tue, 17 Nov from Bangkok to Chicago, returning Mon, 23 Nov, priced at ฿32,050 found 16 hours ago
EVA Airways
Tue, 1 Sept - Tue, 6 Oct
BKK
Bangkok
STL
St. Louis
฿33,125 Return, found 2 days ago
฿33,125
Return
found 2 days ago
Select EVA Airways flight, departing Tue, 1 Sept from Bangkok to St. Louis, returning Tue, 6 Oct, priced at ฿33,125 found 2 days ago
United
Mon, 18 May - Wed, 26 Aug
BKK
Bangkok
ORD
Chicago
฿33,710 Return, found 19 hours ago
฿33,710
Return
found 19 hours ago
Select United flight, departing Mon, 18 May from Bangkok to Chicago, returning Wed, 26 Aug, priced at ฿33,710 found 19 hours ago
All Nippon Airways
Sun, 17 May - Wed, 9 Sept
BKK
Bangkok
ORD
Chicago
฿34,320 Return, found 6 days ago
฿34,320
Return
found 6 days ago
Select All Nippon Airways flight, departing Sun, 17 May from Bangkok to Chicago, returning Wed, 9 Sept, priced at ฿34,320 found 6 days ago
Qatar Airways
Thu, 7 May - Wed, 5 Aug
HKT
Phuket
ORD
Chicago
฿35,990 Return, found 2 days ago
฿35,990
Return
found 2 days ago
Select Qatar Airways flight, departing Thu, 7 May from Phuket to Chicago, returning Wed, 5 Aug, priced at ฿35,990 found 2 days ago
EVA Airways
Sun, 4 Oct - Sat, 17 Oct
BKK
Bangkok
ORD
Chicago
฿36,750 Return, just found
฿36,750
Return
just found
Select EVA Airways flight, departing Sun, 4 Oct from Bangkok to Chicago, returning Sat, 17 Oct, priced at ฿36,750 just found

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.

Delta
Mon, 11 May - Wed, 2 Sept
BKK
Bangkok
MDW
Chicago
฿31,305 Return, found 5 days ago
฿31,305
Return
found 5 days ago
Select Delta flight, departing Mon, 11 May from Bangkok to Chicago, returning Wed, 2 Sept, priced at ฿31,305 found 5 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 ฿31,305. 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 ฿31,305 and ฿36,750. Many lucky travellers nabbed one-way tickets from Bangkok (BKK) for as little as ฿19,475.
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 ฿31,305 to ฿36,750.
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

Explore a world of travel with Expedia

*Available to Expedia members.