Cheap Flights to Illinois | Popular Routes to Illinois from HK$1,091

View HK$1,091 flight on Thu, 9 Apr 2026Opens in a new window

Popular airlines to Illinois

  • Delta

    Delta

  • American Airlines

    American Airlines

  • United

    United

  • Southwest Airlines

    Southwest Airlines

  • Frontier Airlines

    Frontier Airlines

  • Spirit Airlines

    Spirit Airlines

  • Alaska 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$1,091 for one-way flights and HK$2,127 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 19 Feb - Wed, 11 Mar
ORD
Chicago
STL
St. Louis
HK$2,127 Return, found 20 hours ago
HK$2,127
Return
found 20 hours ago
Select Delta flight, departing Thu, 19 Feb from Chicago to St. Louis, returning Wed, 11 Mar, priced at HK$2,127 found 20 hours ago
United
Thu, 19 Feb - Wed, 11 Mar
ORD
Chicago
STL
St. Louis
HK$2,435 Return, found 20 hours ago
HK$2,435
Return
found 20 hours ago
Select United flight, departing Thu, 19 Feb from Chicago to St. Louis, returning Wed, 11 Mar, priced at HK$2,435 found 20 hours ago
American Airlines
Thu, 19 Feb - Wed, 11 Mar
ORD
Chicago
STL
St. Louis
HK$2,435 Return, found 20 hours ago
HK$2,435
Return
found 20 hours ago
Select American Airlines flight, departing Thu, 19 Feb from Chicago to St. Louis, returning Wed, 11 Mar, priced at HK$2,435 found 20 hours ago
American Airlines
Mon, 19 Jan - Mon, 26 Jan
ORD
Chicago
CMI
Champaign
HK$3,631 Return, found 5 days ago
HK$3,631
Return
found 5 days ago
Select American Airlines flight, departing Mon, 19 Jan from Chicago to Champaign, returning Mon, 26 Jan, priced at HK$3,631 found 5 days ago
China Airlines
Thu, 16 Apr - Thu, 23 Apr
HKG
Hong Kong SAR
ORD
Chicago
HK$6,579 Return, found 3 days ago
HK$6,579
Return
found 3 days ago
Select China Airlines flight, departing Thu, 16 Apr from Hong Kong SAR to Chicago, returning Thu, 23 Apr, priced at HK$6,579 found 3 days ago
Delta
Thu, 8 Oct - Wed, 14 Oct
HKG
Hong Kong SAR
MDW
Chicago
HK$6,859 Return, found 3 days ago
HK$6,859
Return
found 3 days ago
Select Delta flight, departing Thu, 8 Oct from Hong Kong SAR to Chicago, returning Wed, 14 Oct, priced at HK$6,859 found 3 days ago
Air Canada
Mon, 22 Jun - Tue, 4 Aug
HKG
Hong Kong SAR
ORD
Chicago
HK$7,076 Return, found 16 hours ago
HK$7,076
Return
found 16 hours ago
Select Air Canada flight, departing Mon, 22 Jun from Hong Kong SAR to Chicago, returning Tue, 4 Aug, priced at HK$7,076 found 16 hours ago
EVA Airways
Fri, 20 Mar - Fri, 3 Apr
HKG
Hong Kong SAR
ORD
Chicago
HK$7,125 Return, found 2 hours ago
HK$7,125
Return
found 2 hours ago
Select EVA Airways flight, departing Fri, 20 Mar from Hong Kong SAR to Chicago, returning Fri, 3 Apr, priced at HK$7,125 found 2 hours ago
Korean Air
Tue, 6 Oct - Fri, 16 Oct
HKG
Hong Kong SAR
ORD
Chicago
HK$7,277 Return, found 7 hours ago
HK$7,277
Return
found 7 hours ago
Select Korean Air flight, departing Tue, 6 Oct from Hong Kong SAR to Chicago, returning Fri, 16 Oct, priced at HK$7,277 found 7 hours ago
EVA Airways
Tue, 3 Feb - Sat, 7 Feb
HKG
Hong Kong SAR
STL
St. Louis
HK$7,329 Return, found 15 hours ago
HK$7,329
Return
found 15 hours ago
Select EVA Airways flight, departing Tue, 3 Feb from Hong Kong SAR to St. Louis, returning Sat, 7 Feb, priced at HK$7,329 found 15 hours 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$2,127. 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$2,127 and HK$7,329. Many lucky travelers nabbed one-way tickets from Chicago (ORD) for as little as HK$1,091.
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$2,127 to HK$7,329.
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.

China Airlines
Thu, 16 Apr - Thu, 23 Apr
HKG
Hong Kong SAR
ORD
Chicago
HK$6,579 Return, found 3 days ago
HK$6,579
Return
found 3 days ago
Select China Airlines flight, departing Thu, 16 Apr from Hong Kong SAR to Chicago, returning Thu, 23 Apr, priced at HK$6,579 found 3 days ago
*Available to Expedia members.