Flight to Illinois

View S$385 flight on Sun, 18 Jan, 2026Opens in a new window

Popular airlines to Illinois

  • Delta

    Delta

  • American Airlines

    American Airlines

  • United

    United

  • Frontier Airlines

    Frontier Airlines

  • Southwest Airlines

    Southwest Airlines

  • Spirit Airlines

    Spirit Airlines

  • Alaska Airlines

    Alaska Airlines

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

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

    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 S$385 for one-way flights and S$541 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Fri, 20 Feb - Fri, 6 Mar
ORD
Chicago
CMI
Champaign
S$541 Return, found 6 days ago
S$541
Return
found 6 days ago
Select American Airlines flight, departing Fri, 20 Feb from Chicago to Champaign, returning Fri, 6 Mar, priced at S$541 found 6 days ago
Delta
Sun, 18 Jan - Sun, 25 Jan
ORD
Chicago
STL
St. Louis
S$672 Return, found 10 hours ago
S$672
Return
found 10 hours ago
Select Delta flight, departing Sun, 18 Jan from Chicago to St. Louis, returning Sun, 25 Jan, priced at S$672 found 10 hours ago
Delta
Sun, 18 Jan - Sun, 25 Jan
ORD
Chicago
STL
St. Louis
S$688 Return, found 10 hours ago
S$688
Return
found 10 hours ago
Select Delta flight, departing Sun, 18 Jan from Chicago to St. Louis, returning Sun, 25 Jan, priced at S$688 found 10 hours ago
United
Sun, 18 Jan - Sun, 25 Jan
ORD
Chicago
STL
St. Louis
S$698 Return, found 10 hours ago
S$698
Return
found 10 hours ago
Select United flight, departing Sun, 18 Jan from Chicago to St. Louis, returning Sun, 25 Jan, priced at S$698 found 10 hours ago
Air Canada
Mon, 9 Feb - Thu, 19 Feb
SIN
Singapore
ORD
Chicago
S$1,177 Return, found 5 days ago
S$1,177
Return
found 5 days ago
Select Air Canada flight, departing Mon, 9 Feb from Singapore to Chicago, returning Thu, 19 Feb, priced at S$1,177 found 5 days ago
Korean Air
Mon, 16 Feb - Wed, 25 Feb
SIN
Singapore
ORD
Chicago
S$1,235 Return, found 1 hour ago
S$1,235
Return
found 1 hour ago
Select Korean Air flight, departing Mon, 16 Feb from Singapore to Chicago, returning Wed, 25 Feb, priced at S$1,235 found 1 hour ago
Delta
Thu, 19 Mar - Tue, 31 Mar
SIN
Singapore
MDW
Chicago
S$1,237 Return, found 2 days ago
S$1,237
Return
found 2 days ago
Select Delta flight, departing Thu, 19 Mar from Singapore to Chicago, returning Tue, 31 Mar, priced at S$1,237 found 2 days ago
Japan Airlines
Thu, 22 Jan - Wed, 28 Jan
SIN
Singapore
ORD
Chicago
S$1,244 Return, found 1 hour ago
S$1,244
Return
found 1 hour ago
Select Japan Airlines flight, departing Thu, 22 Jan from Singapore to Chicago, returning Wed, 28 Jan, priced at S$1,244 found 1 hour ago
China Airlines
Thu, 22 Jan - Mon, 26 Jan
SIN
Singapore
STL
St. Louis
S$1,292 Return, found 5 days ago
S$1,292
Return
found 5 days ago
Select China Airlines flight, departing Thu, 22 Jan from Singapore to St. Louis, returning Mon, 26 Jan, priced at S$1,292 found 5 days ago
Air India
Thu, 26 Feb - Fri, 6 Mar
SIN
Singapore
ORD
Chicago
S$1,379 Return, found 2 days ago
S$1,379
Return
found 2 days ago
Select Air India flight, departing Thu, 26 Feb from Singapore to Chicago, returning Fri, 6 Mar, priced at S$1,379 found 2 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.

Air Canada
Mon, 9 Feb - Thu, 19 Feb
SIN
Singapore
ORD
Chicago
S$1,177 Return, found 5 days ago
S$1,177
Return
found 5 days ago
Select Air Canada flight, departing Mon, 9 Feb from Singapore to Chicago, returning Thu, 19 Feb, priced at S$1,177 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 S$541. 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 S$541 and S$1,379. Many lucky travellers nabbed one-way tickets from Chicago (ORD) for as little as S$385.
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 S$541 to S$1,379.
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

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.

Travel information

Illinois Flights Information

Airlines serving
Delta, United, American Airlines, Japan Airlines, China Airlines, Korean Air, Air Canada, Air India
Roundtrip price
from S$541
Illinois Flights Information

Explore a world of travel with Expedia

*Available to Expedia members.