Cheap Flights to Illinois from ₩867,200

View ₩867,200 flight on Mon, May 11, 2026Opens in a new window

Popular airlines to Illinois

  • Frontier Airlines

  • Delta

  • American Airlines

  • United

  • Spirit Airlines

  • Alaska Airlines

  • JetBlue Airways

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How much is the cheapest flight to Illinois?

Prices were available within the past 7 days and start at ₩867,200 for one-way flights and ₩1,653,600 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, May 12 - Tue, Aug 11
ICN
Seoul
ORD
Chicago
₩1,653,600 Roundtrip, found 1 day ago
₩1,653,600
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, May 12 from Seoul to Chicago, returning Tue, Aug 11, priced at ₩1,653,600 found 1 day ago
American Airlines
Wed, Nov 18 - Wed, Nov 25
ICN
Seoul
ORD
Chicago
₩1,662,600 Roundtrip, found 3 days ago
₩1,662,600
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Nov 18 from Seoul to Chicago, returning Wed, Nov 25, priced at ₩1,662,600 found 3 days ago
Air Canada
Tue, Oct 20 - Tue, Nov 3
ICN
Seoul
ORD
Chicago
₩1,736,300 Roundtrip, found 4 days ago
₩1,736,300
Roundtrip
found 4 days ago
Select Air Canada flight, departing Tue, Oct 20 from Seoul to Chicago, returning Tue, Nov 3, priced at ₩1,736,300 found 4 days ago
Alaska Airlines
Wed, May 13 - Sat, May 30
ICN
Seoul
ORD
Chicago
₩1,779,000 Roundtrip, found 1 day ago
₩1,779,000
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Wed, May 13 from Seoul to Chicago, returning Sat, May 30, priced at ₩1,779,000 found 1 day ago
United
Tue, Oct 13 - Tue, Oct 27
ICN
Seoul
ORD
Chicago
₩1,799,600 Roundtrip, just found
₩1,799,600
Roundtrip
just found
Select United flight, departing Tue, Oct 13 from Seoul to Chicago, returning Tue, Oct 27, priced at ₩1,799,600 just found
Qatar Airways
Mon, May 11 - Mon, Jun 1
ICN
Seoul
ORD
Chicago
₩1,853,900 Roundtrip, found 1 day ago
₩1,853,900
Roundtrip
found 1 day ago
Select Qatar Airways flight, departing Mon, May 11 from Seoul to Chicago, returning Mon, Jun 1, priced at ₩1,853,900 found 1 day ago
Delta
Wed, Nov 18 - Sat, Nov 21
ICN
Seoul
STL
St. Louis
₩1,870,800 Roundtrip, found 6 days ago
₩1,870,800
Roundtrip
found 6 days ago
Select Delta flight, departing Wed, Nov 18 from Seoul to St. Louis, returning Sat, Nov 21, priced at ₩1,870,800 found 6 days ago
EVA Airways
Tue, Oct 13 - Tue, Oct 27
ICN
Seoul
ORD
Chicago
₩1,947,700 Roundtrip, just found
₩1,947,700
Roundtrip
just found
Select EVA Airways flight, departing Tue, Oct 13 from Seoul to Chicago, returning Tue, Oct 27, priced at ₩1,947,700 just found
WestJet
Thu, May 21 - Sun, May 24
ICN
Seoul
ORD
Chicago
₩1,967,900 Roundtrip, found 3 hours ago
₩1,967,900
Roundtrip
found 3 hours ago
Select WestJet flight, departing Thu, May 21 from Seoul to Chicago, returning Sun, May 24, priced at ₩1,967,900 found 3 hours ago
Korean Air
Wed, Oct 14 - Sun, Oct 18
ICN
Seoul
STL
St. Louis
₩1,971,400 Roundtrip, found 3 days ago
₩1,971,400
Roundtrip
found 3 days ago
Select Korean Air flight, departing Wed, Oct 14 from Seoul to St. Louis, returning Sun, Oct 18, priced at ₩1,971,400 found 3 days 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.

American Airlines
Tue, May 12 - Tue, Aug 11
ICN
Seoul
ORD
Chicago
₩1,653,600 Roundtrip, found 1 day ago
₩1,653,600
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, May 12 from Seoul to Chicago, returning Tue, Aug 11, priced at ₩1,653,600 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 ₩1,653,600. 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 ₩1,653,600 and ₩1,971,400. Many lucky travelers nabbed one-way tickets from Seoul (ICN) for as little as ₩867,200.
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 ₩1,653,600 to ₩1,971,400.
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

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About Illinois

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