Cheap Flights to Illinois | Popular Routes to Illinois from HK$835

View HK$835 flight on Sat, 21 Mar 2026Opens in a new window

Popular airlines to Illinois

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  • American Airlines

  • United

  • Frontier Airlines

  • Southwest Airlines

  • Spirit Airlines

  • Alaska Airlines

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Cheap round-trip flights to Illinois

Prices were available within the past 7 days and start at HK$835 for one-way flights and HK$2,169 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, 12 Mar - Tue, 17 Mar
AUS
Austin
ORD
Chicago
HK$2,169 Return, found 2 hours ago
HK$2,169
Return
found 2 hours ago
Select United flight, departing Thu, 12 Mar from Austin to Chicago, returning Tue, 17 Mar, priced at HK$2,169 found 2 hours ago
American Airlines
Thu, 12 Mar - Tue, 17 Mar
AUS
Austin
ORD
Chicago
HK$2,612 Return, found 2 hours ago
HK$2,612
Return
found 2 hours ago
Select American Airlines flight, departing Thu, 12 Mar from Austin to Chicago, returning Tue, 17 Mar, priced at HK$2,612 found 2 hours ago
Delta
Fri, 20 Feb - Mon, 23 Feb
AUS
Austin
MDW
Chicago
HK$3,346 Return, found 22 hours ago
HK$3,346
Return
found 22 hours ago
Select Delta flight, departing Fri, 20 Feb from Austin to Chicago, returning Mon, 23 Feb, priced at HK$3,346 found 22 hours ago
Delta
Fri, 20 Feb - Mon, 23 Feb
AUS
Austin
ORD
Chicago
HK$3,346 Return, found 22 hours ago
HK$3,346
Return
found 22 hours ago
Select Delta flight, departing Fri, 20 Feb from Austin to Chicago, returning Mon, 23 Feb, priced at HK$3,346 found 22 hours ago
Air Canada
Fri, 22 May - Fri, 29 May
ICN
Seoul
STL
St. Louis
HK$5,444 Return, found 20 hours ago
HK$5,444
Return
found 20 hours ago
Select Air Canada flight, departing Fri, 22 May from Seoul to St. Louis, returning Fri, 29 May, priced at HK$5,444 found 20 hours ago
Air Canada
Fri, 22 May - Fri, 29 May
ICN
Seoul
ORD
Chicago
HK$5,444 Return, found 20 hours ago
HK$5,444
Return
found 20 hours ago
Select Air Canada flight, departing Fri, 22 May from Seoul to Chicago, returning Fri, 29 May, priced at HK$5,444 found 20 hours ago
EVA Airways
Thu, 24 Sept - Sun, 27 Sept
ICN
Seoul
ORD
Chicago
HK$9,315 Return, found 5 days ago
HK$9,315
Return
found 5 days ago
Select EVA Airways flight, departing Thu, 24 Sept from Seoul to Chicago, returning Sun, 27 Sept, priced at HK$9,315 found 5 days ago
Delta
Thu, 24 Sept - Sun, 27 Sept
ICN
Seoul
MDW
Chicago
HK$9,456 Return, found 5 days ago
HK$9,456
Return
found 5 days ago
Select Delta flight, departing Thu, 24 Sept from Seoul to Chicago, returning Sun, 27 Sept, priced at HK$9,456 found 5 days ago
Cathay Pacific
Fri, 20 Feb - Thu, 26 Feb
ICN
Seoul
ORD
Chicago
HK$9,506 Return, found 2 days ago
HK$9,506
Return
found 2 days ago
Select Cathay Pacific flight, departing Fri, 20 Feb from Seoul to Chicago, returning Thu, 26 Feb, priced at HK$9,506 found 2 days ago
Korean Air
Thu, 24 Sept - Sun, 27 Sept
ICN
Seoul
ORD
Chicago
HK$9,526 Return, found 5 days ago
HK$9,526
Return
found 5 days ago
Select Korean Air flight, departing Thu, 24 Sept from Seoul to Chicago, returning Sun, 27 Sept, priced at HK$9,526 found 5 days ago

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.

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 HK$2,169. 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 HK$2,169 and HK$9,526. Many lucky travelers nabbed one-way tickets from Austin (AUS) for as little as HK$835.
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 HK$2,169 to HK$9,526.
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.

Air Canada
Tue, 23 Jun - Tue, 7 Jul
HKG
Hong Kong SAR
ORD
Chicago
HK$6,000 Return, found 19 hours ago
HK$6,000
Return
found 19 hours ago
Select Air Canada flight, departing Tue, 23 Jun from Hong Kong SAR to Chicago, returning Tue, 7 Jul, priced at HK$6,000 found 19 hours ago
*Available to Expedia members.