Cheap Flights to Illinois | Popular Routes to Illinois from HK$4,176

View HK$4,176 flight on Mon, 7 Sept 2026Opens in a new window

Flight 1

Flight 2

Popular airlines to Illinois

  • Delta

  • Frontier Airlines

  • American Airlines

  • United

  • Spirit Airlines

  • Southwest Airlines

  • Alaska Airlines

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 35% on select hotels after you book a flight*

  • 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 HK$4,176 for one-way flights and HK$6,295 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Sun, 24 May - Thu, 17 Sept
LHR
London
ORD
Chicago
HK$6,295 Return, found 6 days ago
HK$6,295
Return
found 6 days ago
Select Scandinavian Airlines flight, departing Sun, 24 May from London to Chicago, returning Thu, 17 Sept, priced at HK$6,295 found 6 days ago
Virgin Atlantic
Tue, 12 May - Mon, 18 May
LHR
London
ORD
Chicago
HK$6,481 Return, found 17 hours ago
HK$6,481
Return
found 17 hours ago
Select Virgin Atlantic flight, departing Tue, 12 May from London to Chicago, returning Mon, 18 May, priced at HK$6,481 found 17 hours ago
Delta
Tue, 12 May - Mon, 18 May
LHR
London
ORD
Chicago
HK$6,481 Return, found 17 hours ago
HK$6,481
Return
found 17 hours ago
Select Delta flight, departing Tue, 12 May from London to Chicago, returning Mon, 18 May, priced at HK$6,481 found 17 hours ago
American Airlines
Wed, 22 Apr - Tue, 28 Apr
LHR
London
ORD
Chicago
HK$6,602 Return, found 4 days ago
HK$6,602
Return
found 4 days ago
Select American Airlines flight, departing Wed, 22 Apr from London to Chicago, returning Tue, 28 Apr, priced at HK$6,602 found 4 days ago
Air Canada
Tue, 21 Apr - Mon, 27 Apr
LHR
London
ORD
Chicago
HK$6,751 Return, found 4 days ago
HK$6,751
Return
found 4 days ago
Select Air Canada flight, departing Tue, 21 Apr from London to Chicago, returning Mon, 27 Apr, priced at HK$6,751 found 4 days ago
British Airways
Mon, 7 Sept - Mon, 14 Sept
LHR
London
ORD
Chicago
HK$6,852 Return, found 5 hours ago
HK$6,852
Return
found 5 hours ago
Select British Airways flight, departing Mon, 7 Sept from London to Chicago, returning Mon, 14 Sept, priced at HK$6,852 found 5 hours ago
Finnair
Mon, 7 Sept - Mon, 14 Sept
LHR
London
ORD
Chicago
HK$6,880 Return, found 5 hours ago
HK$6,880
Return
found 5 hours ago
Select Finnair flight, departing Mon, 7 Sept from London to Chicago, returning Mon, 14 Sept, priced at HK$6,880 found 5 hours ago
Austrian Airlines
Mon, 7 Sept - Mon, 14 Sept
LHR
London
ORD
Chicago
HK$7,065 Return, found 5 hours ago
HK$7,065
Return
found 5 hours ago
Select Austrian Airlines flight, departing Mon, 7 Sept from London to Chicago, returning Mon, 14 Sept, priced at HK$7,065 found 5 hours ago
Lufthansa
Mon, 7 Sept - Mon, 14 Sept
LHR
London
ORD
Chicago
HK$7,065 Return, found 5 hours ago
HK$7,065
Return
found 5 hours ago
Select Lufthansa flight, departing Mon, 7 Sept from London to Chicago, returning Mon, 14 Sept, priced at HK$7,065 found 5 hours ago
Turkish Airlines
Wed, 15 Apr - Mon, 20 Apr
LHR
London
ORD
Chicago
HK$7,143 Return, found 2 days ago
HK$7,143
Return
found 2 days ago
Select Turkish Airlines flight, departing Wed, 15 Apr from London to Chicago, returning Mon, 20 Apr, priced at HK$7,143 found 2 days ago

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.

Delta
Tue, 2 Jun - Sat, 25 Jul
HKG
Hong Kong SAR
ORD
Chicago
HK$7,362 Return, found 1 day ago
HK$7,362
Return
found 1 day ago
Select Delta flight, departing Tue, 2 Jun from Hong Kong SAR to Chicago, returning Sat, 25 Jul, priced at HK$7,362 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 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$6,295. 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$6,295 and HK$7,362. Many lucky travelers nabbed one-way tickets from London (LHR) for as little as HK$4,176.
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$6,295 to HK$7,362.
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.

Explore a world of travel with Expedia

*Available to Expedia members.