Cheap Flights to Illinois from ₩389,200

View ₩389,200 flight on Mon, Jul 6, 2026Opens in a new window

Popular airlines to Illinois

  • Delta

  • Frontier Airlines

  • American Airlines

  • United

  • Alaska Airlines

  • Spirit Airlines

  • JetBlue Airways

  • 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

How much is the cheapest flight to Illinois?

Prices were available within the past 7 days and start at ₩389,200 for one-way flights and ₩606,100 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, May 12 - Tue, May 19
FAR
Fargo
MLI
Moline
₩606,100 Roundtrip, found 20 hours ago
₩606,100
Roundtrip
found 20 hours ago
Select American Airlines flight, departing Tue, May 12 from Fargo to Moline, returning Tue, May 19, priced at ₩606,100 found 20 hours ago
United
Tue, May 12 - Tue, May 19
FAR
Fargo
MLI
Moline
₩606,100 Roundtrip, found 20 hours ago
₩606,100
Roundtrip
found 20 hours ago
Select United flight, departing Tue, May 12 from Fargo to Moline, returning Tue, May 19, priced at ₩606,100 found 20 hours ago
Singapore Airlines
Thu, Sep 10 - Fri, Sep 18
ICN
Seoul
ORD
Chicago
₩1,718,800 Roundtrip, found 1 day ago
₩1,718,800
Roundtrip
found 1 day ago
Select Singapore Airlines flight, departing Thu, Sep 10 from Seoul to Chicago, returning Fri, Sep 18, priced at ₩1,718,800 found 1 day ago
Air Canada
Thu, Oct 15 - Wed, Oct 21
ICN
Seoul
ORD
Chicago
₩1,736,000 Roundtrip, found 1 day ago
₩1,736,000
Roundtrip
found 1 day ago
Select Air Canada flight, departing Thu, Oct 15 from Seoul to Chicago, returning Wed, Oct 21, priced at ₩1,736,000 found 1 day ago
Alaska Airlines
Mon, May 18 - Sun, Jun 7
ICN
Seoul
ORD
Chicago
₩1,778,900 Roundtrip, found 1 day ago
₩1,778,900
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Mon, May 18 from Seoul to Chicago, returning Sun, Jun 7, priced at ₩1,778,900 found 1 day ago
EVA Airways
Wed, Sep 16 - Tue, Sep 29
ICN
Seoul
ORD
Chicago
₩1,797,100 Roundtrip, found 1 day ago
₩1,797,100
Roundtrip
found 1 day ago
Select EVA Airways flight, departing Wed, Sep 16 from Seoul to Chicago, returning Tue, Sep 29, priced at ₩1,797,100 found 1 day ago
United
Tue, Jun 9 - Wed, Jul 8
ICN
Seoul
CMI
Champaign
₩1,799,800 Roundtrip, found 5 days ago
₩1,799,800
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jun 9 from Seoul to Champaign, returning Wed, Jul 8, priced at ₩1,799,800 found 5 days ago
Delta
Mon, Sep 28 - Sun, Oct 11
ICN
Seoul
STL
St. Louis
₩1,870,800 Roundtrip, found 4 days ago
₩1,870,800
Roundtrip
found 4 days ago
Select Delta flight, departing Mon, Sep 28 from Seoul to St. Louis, returning Sun, Oct 11, priced at ₩1,870,800 found 4 days ago
Qatar Airways
Wed, Sep 2 - Tue, Sep 22
ICN
Seoul
ORD
Chicago
₩1,883,400 Roundtrip, found 2 days ago
₩1,883,400
Roundtrip
found 2 days ago
Select Qatar Airways flight, departing Wed, Sep 2 from Seoul to Chicago, returning Tue, Sep 22, priced at ₩1,883,400 found 2 days ago
Turkish Airlines
Wed, Jul 8 - Tue, Jul 21
ICN
Seoul
ORD
Chicago
₩1,931,900 Roundtrip, found 1 day ago
₩1,931,900
Roundtrip
found 1 day ago
Select Turkish Airlines flight, departing Wed, Jul 8 from Seoul to Chicago, returning Tue, Jul 21, priced at ₩1,931,900 found 1 day ago

Trending flights to Illinois

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Singapore Airlines
Thu, Sep 10 - Fri, Sep 18
ICN
Seoul
ORD
Chicago
₩1,718,800 Roundtrip, found 1 day ago
₩1,718,800
Roundtrip
found 1 day ago
Select Singapore Airlines flight, departing Thu, Sep 10 from Seoul to Chicago, returning Fri, Sep 18, priced at ₩1,718,800 found 1 day 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 traveling somewhere new or rendezvousing at a favorite 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 ₩606,100. 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 ₩606,100 and ₩1,931,900. Many lucky travelers nabbed one-way tickets from Fargo (FAR) for as little as ₩389,200.
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 ₩606,100 to ₩1,931,900.
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 65ºF to 75ºF 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 traveler'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.