Find flights
When to book
FAQs

Cheap flights from London, ON to Illinois from C$ 371

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/5. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — ORD
18 May — 25 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Illinois

Enter your travel dates to find the best prices.

Cheapest flights from London to Illinois
Explore the most affordable flight options available from London to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 April 2026.

Thu 12/113:25 p.m.
YXU
-
ORD
1 stop5h 10m
Air Canada
Sun 15/118:00 a.m.
ORD
-
YXU
1 stop6h 06m
Air Canada
Deal found 17/4C$ 658
Tue 2/69:30 a.m.
YXU
-
ORD
1 stop4h 55m
Air Canada
Tue 9/69:55 a.m.
ORD
-
YXU
1 stop4h 03m
Air Canada
Deal found 18/4C$ 684
Tue 2/612:20 p.m.
YXU
-
ORD
1 stop4h 30m
United Airlines
Tue 9/65:00 a.m.
ORD
-
YXU
2 stops8h 58m
United Airlines
Deal found 18/4C$ 769
Fri 29/512:20 p.m.
YXU
-
ORD
1 stop5h 39m
United Airlines
Fri 5/68:50 a.m.
ORD
-
YXU
1 stop5h 08m
United Airlines
Deal found 14/4C$ 819
Sat 30/59:30 a.m.
YXU
-
ORD
1 stop4h 55m
United Airlines
Sat 6/65:00 p.m.
ORD
-
YXU
2 stops17h 43m
United Airlines
Deal found 15/4C$ 821
Fri 29/55:55 p.m.
YXU
-
MDW
3 stops25h 01m
Multiple Airlines
Fri 5/610:25 a.m.
MDW
-
YXU
3 stops17h 55m
Multiple Airlines
Deal found 14/4C$ 1,413
Thu 2/78:40 p.m.
YXU
-
MDW
3 stops18h 55m
Multiple Airlines
Sun 5/710:25 a.m.
MDW
-
YXU
3 stops17h 55m
Multiple Airlines
Deal found 16/4C$ 1,511
Sat 30/55:55 p.m.
YXU
-
MDW
3 stops25h 38m
WestJet
Sat 6/69:22 a.m.
MDW
-
YXU
3 stops27h 28m
WestJet
Deal found 15/4C$ 1,715
Thu 2/78:40 p.m.
YXU
-
MDW
2 stops22h 38m
WestJet
Sun 5/77:16 p.m.
MDW
-
YXU
3 stops33h 04m
WestJet
Deal found 16/4C$ 1,725
Fri 29/55:55 p.m.
YXU
-
MDW
3 stops25h 01m
WestJet
Fri 5/69:23 a.m.
MDW
-
YXU
2 stops18h 57m
WestJet
Deal found 14/4C$ 1,823
Tue 16/62:40 p.m.
YXU
-
MDW
2 stops28h 38m
WestJet
Sat 20/66:55 p.m.
MDW
-
YXU
2 stops17h 55m
WestJet
Deal found 14/4C$ 1,844
Tue 2/65:55 p.m.
YXU
-
MDW
3 stops25h 38m
WestJet
Tue 9/61:16 p.m.
MDW
-
YXU
3 stops26h 29m
WestJet
Deal found 18/4C$ 1,860

Find flight deals from London to Illinois

Keep the following information in mind while searching for London to Illinois flight deals. Data was last updated 18 April 2026.

Round-trip from

C$ 739

One-way from

C$ 371
Air Canada
  • Air Canada
  • 29/5-5/6
  • 2 total stops
  • 9h 42m total
  • London to Illinois
Search Deals
WestJet
  • WestJet
  • 29/5
  • 1 total stop
  • 23h 45m total
  • London to Illinois
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from London to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 18 April 2026.
Use the filters below to find and compare flights from London to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonChicago

YXU - ORD

YXUORD

London

Tue 2/6

9:30 a.m.-1:25 p.m.

1 stop4h 55m

Chicago O'Hare Intl

Tue 9/6

9:55 a.m.-2:58 p.m.

1 stop4h 03m

C$ 684

LondonChicago

YXU - ORD

YXUORD

London

Fri 29/5

12:20 p.m.-4:59 p.m.

1 stop5h 39m

Chicago O'Hare Intl

Fri 5/6

9:55 a.m.-2:58 p.m.

1 stop4h 03m

C$ 739

LondonChicago

YXU - ORD

YXUORD

London

Tue 2/6

9:30 a.m.-2:06 p.m.

1 stop5h 36m

Chicago O'Hare Intl

Tue 9/6

9:55 a.m.-2:58 p.m.

1 stop4h 03m

C$ 769

LondonChicago

YXU - ORD

YXUORD

London

Fri 29/5

12:20 p.m.-4:59 p.m.

1 stop5h 39m

Chicago O'Hare Intl

Fri 5/6

8:50 a.m.-2:58 p.m.

1 stop5h 08m

C$ 819

LondonChicago

YXU - ORD

YXUORD

London

Sat 30/5

9:30 a.m.-1:25 p.m.

1 stop4h 55m

Chicago O'Hare Intl

Sat 6/6

5:00 p.m.-11:43 a.m.

2 stops17h 43m

C$ 821
Quickest round-trip

LondonChicago

YXU - ORD

YXUORD

London

Sun 31/5

5:10 a.m.-9:00 a.m.

1 stop4h 50m

Chicago O'Hare Intl

Sun 7/6

9:55 a.m.-2:58 p.m.

1 stop4h 03m

C$ 823

LondonChicago

YXU - ORD

YXUORD

London

Mon 18/5

9:30 a.m.-1:25 p.m.

1 stop4h 55m

Chicago O'Hare Intl

Sat 23/5

6:00 p.m.-11:43 a.m.

2 stops16h 43m

C$ 823

LondonChicago

YXU - ORD

YXUORD

London

Mon 18/5

12:20 p.m.-8:08 p.m.

2 stops8h 48m

Chicago O'Hare Intl

Sat 23/5

7:40 p.m.-11:43 a.m.

2 stops15h 03m

C$ 827

LondonChicago

YXU - MDW

YXUMDW

London

Fri 29/5

5:55 p.m.-5:56 p.m.

3 stops25h 01m

Chicago Midway

Fri 5/6

10:25 a.m.-5:20 a.m.

3 stops17h 55m

C$ 1,413

LondonChicago

YXU - MDW

YXUMDW

London

Thu 2/7

8:40 p.m.-2:35 p.m.

3 stops18h 55m

Chicago Midway

Sun 5/7

10:25 a.m.-5:20 a.m.

3 stops17h 55m

C$ 1,511

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/4

Showing 1-10 of 25 resultsSorted by cheapest first
1
2
3

Best time to book a flight from London to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from London with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to Illinois
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from London to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from London to Illinois?

    If you book a flight to Illinois from London, you will be flying from London, which is the city’s only airport. London (YXU) is located 8.6 km from the centre of London.

  • How long is the flight from London, Ontario to Illinois?

    There are many flights that can get you from London, Ontario to Illinois in 4h 55m. Fly via Air Canada, United Airlines, or WestJet to get the fastest option. Airlines will cover a distance of 565 km. Both multi-stop and direct flights can be found to your destination and back.

  • Can I find deals for flights from London to Illinois that include hotel bookings?

    Yes. In addition to deals on London to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from London to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Illinois.

  • Can I find deals for business class flights from London to Illinois?

    Yes. Cheapflights offers flight deals from London to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Toronto Island to Newark flights
Pearson Intl to John F Kennedy Intl flights
Pearson Intl to Newark flights
Pearson Intl to Las Vegas flights
Pearson Intl to LaGuardia flights
Pierre Elliott Trudeau Intl to Miami flights
Pearson Intl to Los Angeles flights
Pearson Intl to Orlando flights
Pierre Elliott Trudeau Intl to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to Newark flights
Pearson Intl to Fort Lauderdale flights
Pearson Intl to O'Hare Intl flights
Pearson Intl to Seattle flights
Pearson Intl to Miami flights
Pierre Elliott Trudeau Intl to John F Kennedy Intl flights
Pearson Intl to Dallas/Fort Worth flights
Pearson Intl to San Francisco flights
Pierre Elliott Trudeau Intl to LaGuardia flights
Toronto Island to LaGuardia flights
Pearson Intl to Hobby flights
Pierre Elliott Trudeau Intl to Orlando flights
Pierre Elliott Trudeau Intl to Los Angeles flights
Pearson Intl to Tampa flights
Pearson Intl to Atlanta flights
Pearson Intl to Reagan-National flights
Pearson Intl to George Bush Intcntl flights
Pearson Intl to Nashville flights
Pierre Elliott Trudeau Intl to Tampa flights
Toronto Island to Las Vegas flights
Pierre Elliott Trudeau Intl to Las Vegas flights
Pearson Intl to Minneapolis flights
Pierre Elliott Trudeau Intl to O'Hare Intl flights
Pearson Intl to San Diego flights
Pierre Elliott Trudeau Intl to San Francisco flights
Toronto Island to Orlando flights
Toronto Island to Boston flights
Toronto Island to Fort Lauderdale flights
Toronto Island to Miami flights
Pearson Intl to Boston flights
Pearson Intl to Dulles Intl flights
Toronto Island to Midway flights
Toronto Island to John F Kennedy Intl flights
Pierre Elliott Trudeau Intl to Nashville flights
Pearson Intl to Sky Harbor Intl flights
Pearson Intl to Midway flights
Pierre Elliott Trudeau Intl to Dallas/Fort Worth flights
Pearson Intl to Denver flights
Pearson Intl to Philadelphia flights
Pearson Intl to Ontario flights
Toronto Island to Dulles Intl flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Illinois?

Cheapflights makes it easy to find London to Illinois flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from London to Illinois?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from London to Illinois for you. Better yet — we are completely free to use.

Can Cheapflights find flights from London to Illinois with no change fees?

Yes! Cheapflights helps users easily find flights from London to Illinois with no change fees.

Can Cheapflights notify me if prices for flights from London to Illinois become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Illinois from London today and book when prices fit your budget.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.