Flight to Illinois

Popular airlines to Illinois

  • Delta

    Delta

  • Frontier Airlines

    Frontier Airlines

  • American Airlines

    American Airlines

  • United

    United

  • 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$166 for one-way flights and S$352 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 23 Oct - Wed, 29 Oct
SFO
San Francisco
ORD
Chicago
S$352 Return, found 2 days ago
S$352
Return
found 2 days ago
Select Delta flight, departing Thu, 23 Oct from San Francisco to Chicago, returning Wed, 29 Oct, priced at S$352 found 2 days ago
Delta
Mon, 17 Nov - Thu, 20 Nov
SFO
San Francisco
MDW
Chicago
S$417 Return, found 15 hours ago
S$417
Return
found 15 hours ago
Select Delta flight, departing Mon, 17 Nov from San Francisco to Chicago, returning Thu, 20 Nov, priced at S$417 found 15 hours ago
United
Thu, 23 Oct - Wed, 29 Oct
SFO
San Francisco
ORD
Chicago
S$441 Return, found 2 days ago
S$441
Return
found 2 days ago
Select United flight, departing Thu, 23 Oct from San Francisco to Chicago, returning Wed, 29 Oct, priced at S$441 found 2 days ago
American Airlines
Tue, 16 Dec - Wed, 24 Dec
SFO
San Francisco
ORD
Chicago
S$500 Return, found 6 days ago
S$500
Return
found 6 days ago
Select American Airlines flight, departing Tue, 16 Dec from San Francisco to Chicago, returning Wed, 24 Dec, priced at S$500 found 6 days ago
Delta
Fri, 21 Nov - Tue, 25 Nov
SFO
San Francisco
STL
St. Louis
S$726 Return, found 1 day ago
S$726
Return
found 1 day ago
Select Delta flight, departing Fri, 21 Nov from San Francisco to St. Louis, returning Tue, 25 Nov, priced at S$726 found 1 day ago
All Nippon Airways
Thu, 6 Nov - Mon, 10 Nov
SIN
Singapore
ORD
Chicago
S$1,089 Return, found 4 hours ago
S$1,089
Return
found 4 hours ago
Select All Nippon Airways flight, departing Thu, 6 Nov from Singapore to Chicago, returning Mon, 10 Nov, priced at S$1,089 found 4 hours ago
Air Canada
Tue, 24 Feb - Wed, 11 Mar
SIN
Singapore
ORD
Chicago
S$1,155 Return, found 20 hours ago
S$1,155
Return
found 20 hours ago
Select Air Canada flight, departing Tue, 24 Feb from Singapore to Chicago, returning Wed, 11 Mar, priced at S$1,155 found 20 hours ago
Korean Air
Mon, 13 Apr - Sun, 3 May
SIN
Singapore
ORD
Chicago
S$1,250 Return, just found
S$1,250
Return
just found
Select Korean Air flight, departing Mon, 13 Apr from Singapore to Chicago, returning Sun, 3 May, priced at S$1,250 just found
Air Canada
Tue, 18 Nov - Tue, 25 Nov
SIN
Singapore
STL
St. Louis
S$1,279 Return, found 3 hours ago
S$1,279
Return
found 3 hours ago
Select Air Canada flight, departing Tue, 18 Nov from Singapore to St. Louis, returning Tue, 25 Nov, priced at S$1,279 found 3 hours ago
Cathay Pacific
Mon, 13 Apr - Sun, 3 May
SIN
Singapore
ORD
Chicago
S$1,371 Return, just found
S$1,371
Return
just found
Select Cathay Pacific flight, departing Mon, 13 Apr from Singapore to Chicago, returning Sun, 3 May, priced at S$1,371 just found

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.

Illinois Flights Information

Airlines serving
Delta, United, American Airlines, Hawaiian Airlines, Korean Air, All Nippon Airways, Air Canada, Cathay Pacific
Roundtrip price
from S$352

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$352. 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$352 and S$1,371. Many lucky travellers nabbed one-way tickets from San Francisco (SFO) for as little as S$166.
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$352 to S$1,371.
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.

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.

All Nippon Airways
Thu, 6 Nov - Mon, 10 Nov
SIN
Singapore
ORD
Chicago
S$1,089 Return, found 4 hours ago
S$1,089
Return
found 4 hours ago
Select All Nippon Airways flight, departing Thu, 6 Nov from Singapore to Chicago, returning Mon, 10 Nov, priced at S$1,089 found 4 hours ago
*Available to Expedia members.