Find flights
When to book
FAQs

Cheap flights from London, ON to Illinois from C$ 392

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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — ORD
9 Sep — 16 Sep1
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 10 August 2026.

Sun 20/96:10 a.m. -
1 stop11h 30m
Sun 27/95:30 p.m. -
1 stop10h 50m
Deal found 10/8C$ 524
Fri 4/96:10 a.m. -
1 stop11h 30m
Thu 10/95:30 p.m. -
1 stop10h 50m
Deal found 7/8C$ 631
Fri 4/98:40 p.m. -
1 stop21h 00m
Thu 10/98:55 p.m. -
2 stops31h 25m
Deal found 7/8C$ 734
Sun 20/96:10 a.m. -
1 stop11h 30m
Sun 27/97:28 p.m. -
2 stops32h 52m
Deal found 10/8C$ 736
Wed 23/95:40 a.m. -
1 stop4h 20m
Wed 30/92:15 p.m. -
1 stop6h 25m
Deal found 8/8C$ 746
Thu 3/95:40 a.m. -
1 stop4h 20m
Sun 6/93:45 p.m. -
1 stop4h 55m
Deal found 6/8C$ 768
Fri 4/95:40 a.m. -
1 stop4h 20m
Fri 11/93:45 p.m. -
1 stop4h 55m
Deal found 6/8C$ 769
Fri 28/83:30 p.m. -
1 stop5h 22m
Wed 30/99:55 a.m. -
1 stop3h 55m
Deal found 6/8C$ 775
Sun 20/95:40 a.m. -
2 stops9h 47m
Sun 27/92:20 p.m. -
1 stop6h 20m
Deal found 9/8C$ 821
Wed 23/96:10 a.m. -
2 stops32h 11m
Wed 30/98:45 a.m. -
3 stops19h 35m
Deal found 8/8C$ 843
Sun 20/96:10 a.m. -
3 stops33h 25m
Sun 27/911:45 a.m. -
3 stops16h 35m
Deal found 9/8C$ 1,228
Fri 4/98:40 p.m. -
3 stops18h 55m
Thu 10/911:45 a.m. -
3 stops16h 35m
Deal found 7/8C$ 1,284

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 10 August 2026.

Round-trip from

C$ 524

One-way from

C$ 392
WestJet
  • WestJet
  • 20/9-27/9
  • 2 total stops
  • 22h 20m total
  • London to Illinois
Search Deals
WestJet
  • WestJet
  • 2/9
  • 1 total stop
  • 11h 30m 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 10 August 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 London - ORD Chicago O'Hare Intl

YXUORD

London

Sun 20/9

6:10 a.m.-4:40 p.m.

1 stop11h 30m

Chicago O'Hare Intl

Sun 27/9

5:30 p.m.-5:20 a.m.

1 stop10h 50m

C$ 524

LondonChicago

YXU London - ORD Chicago O'Hare Intl

YXUORD

London

Wed 23/9

5:40 a.m.-9:00 a.m.

1 stop4h 20m

Chicago O'Hare Intl

Wed 30/9

2:15 p.m.-9:40 p.m.

1 stop6h 25m

C$ 746

LondonChicago

YXU London - ORD Chicago O'Hare Intl

YXUORD

London

Wed 23/9

6:10 a.m.-1:21 p.m.

2 stops32h 11m

Chicago O'Hare Intl

Wed 30/9

8:45 a.m.-5:20 a.m.

2 stops19h 35m

C$ 852

LondonChicago

YXU London - ORD Chicago O'Hare Intl

YXUORD

London

Tue 8/9

5:40 a.m.-9:00 a.m.

1 stop4h 20m

Chicago O'Hare Intl

Fri 11/9

3:45 p.m.-9:40 p.m.

1 stop4h 55m

C$ 889

LondonChicago

YXU London - ORD Chicago O'Hare Intl

YXUORD

London

Fri 4/9

2:40 p.m.-4:40 p.m.

3 stops27h 00m

Chicago O'Hare Intl

Thu 10/9

5:30 p.m.-5:20 a.m.

1 stop10h 50m

C$ 917
Quickest round-trip

LondonChicago

YXU London - ORD Chicago O'Hare Intl

YXUORD

London

Wed 13/1

3:20 p.m.-6:29 p.m.

1 stop4h 09m

Chicago O'Hare Intl

Sun 14/3

10:05 a.m.-2:39 p.m.

1 stop3h 34m

C$ 988

LondonChicago

YXU London - ORD Chicago O'Hare Intl

YXUORD

London

Tue 12/1

3:20 p.m.-6:29 p.m.

1 stop4h 09m

Chicago O'Hare Intl

Sun 14/3

10:05 a.m.-2:39 p.m.

1 stop3h 34m

C$ 988

LondonChicago

YXU London - ORD Chicago O'Hare Intl

YXUORD

London

Sun 20/9

3:30 p.m.-7:48 p.m.

1 stop5h 18m

Chicago O'Hare Intl

Sun 27/9

8:50 a.m.-5:43 p.m.

2 stops7h 53m

C$ 988

LondonChicago

YXU London - ORD Chicago O'Hare Intl

YXUORD

London

Thu 14/1

5:30 a.m.-9:08 a.m.

1 stop4h 38m

Chicago O'Hare Intl

Sun 14/3

10:05 a.m.-2:39 p.m.

1 stop3h 34m

C$ 988

LondonChicago

YXU London - ORD Chicago O'Hare Intl

YXUORD

London

Fri 4/9

2:40 p.m.-4:40 p.m.

3 stops27h 00m

Chicago O'Hare Intl

Fri 11/9

5:30 p.m.-5:20 a.m.

1 stop10h 50m

C$ 989

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/8

Showing 1-10 of 34 resultsSorted by cheapest first
1
2
3
4

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 20m. Fly via WestJet or Air Canada 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.
Pearson Intl to Newark flights
Toronto Island to Newark flights
Pearson Intl to John F Kennedy Intl flights
Pearson Intl to LaGuardia flights
Pearson Intl to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to LaGuardia flights
Toronto Island to LaGuardia flights
Toronto Island to John F Kennedy Intl flights
Pierre Elliott Trudeau Intl to Fort Lauderdale flights
Pearson Intl to Orlando flights
Pearson Intl to Los Angeles flights
Pearson Intl to Miami flights
Pearson Intl to Las Vegas flights
Pearson Intl to Seattle flights
Hamilton to Newark flights
Pierre Elliott Trudeau Intl to Miami flights
Pierre Elliott Trudeau Intl to Newark flights
Pearson Intl to Dallas/Fort Worth flights
Pearson Intl to O'Hare Intl flights
Pierre Elliott Trudeau Intl to John F Kennedy Intl flights
Pearson Intl to Reagan-National flights
Toronto Island to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to Orlando flights
Pearson Intl to Hobby flights
Pearson Intl to Dulles Intl flights
Toronto Island to Orlando flights
Pearson Intl to San Francisco flights
Pierre Elliott Trudeau Intl to Los Angeles flights
Pearson Intl to Minneapolis flights
Pierre Elliott Trudeau Intl to O'Hare Intl flights
Pearson Intl to George Bush Intcntl flights
Pierre Elliott Trudeau Intl to Las Vegas flights
Pearson Intl to Midway flights
Pearson Intl to San Diego flights
Toronto Island to Boston flights
Pearson Intl to Tampa flights
Pearson Intl to Ontario flights
Toronto Island to Las Vegas flights
Pierre Elliott Trudeau Intl to Dallas/Fort Worth flights
Toronto Island to Midway flights
Pearson Intl to Fort Myers flights
Pearson Intl to Nashville flights
Pearson Intl to Atlanta flights
Pearson Intl to Boston flights
Hamilton to Fort Lauderdale flights
Pearson Intl to Philadelphia flights
Toronto Island to Miami flights
Toronto Island to Los Angeles flights
Toronto Island to O'Hare Intl 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.