Find flights
When to book
Airlines
FAQs

Cheap flights from London, ON to Illinois from C$ 380

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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — ORD
23 Apr — 30 Apr1
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 24 March 2026.

Wed 6/512:20 p.m.
YXU
-
ORD
2 stops8h 48m
Air Canada
Wed 13/58:45 a.m.
ORD
-
YXU
2 stops7h 48m
Air Canada
Deal found 21/3C$ 671
Sat 2/512:20 p.m.
YXU
-
ORD
2 stops8h 48m
Air Canada
Mon 4/53:50 p.m.
ORD
-
YXU
1 stop4h 48m
Air Canada
Deal found 21/3C$ 675
Thu 30/49:25 a.m.
YXU
-
ORD
1 stop4h 40m
Air Canada
Mon 4/53:50 p.m.
ORD
-
YXU
1 stop4h 48m
Air Canada
Deal found 23/3C$ 700
Fri 31/79:30 a.m.
YXU
-
ORD
1 stop4h 52m
Air Canada
Sun 2/89:50 a.m.
ORD
-
YXU
1 stop4h 05m
Air Canada
Deal found 19/3C$ 705
Sat 16/512:20 p.m.
YXU
-
ORD
1 stop5h 39m
Air Canada
Sun 24/53:50 p.m.
ORD
-
YXU
1 stop4h 48m
Air Canada
Deal found 20/3C$ 731
Mon 4/59:30 a.m.
YXU
-
ORD
1 stop4h 55m
United Airlines
Wed 6/512:55 p.m.
ORD
-
YXU
2 stops7h 43m
United Airlines
Deal found 23/3C$ 784
Fri 31/79:30 a.m.
YXU
-
ORD
1 stop4h 52m
United Airlines
Sun 2/86:00 a.m.
ORD
-
YXU
2 stops8h 00m
United Airlines
Deal found 19/3C$ 785
Sat 2/56:10 a.m.
YXU
-
MDW
3 stops33h 25m
Multiple Airlines
Mon 4/510:25 a.m.
MDW
-
YXU
3 stops17h 55m
Multiple Airlines
Deal found 21/3C$ 1,299
Mon 4/55:55 p.m.
YXU
-
MDW
3 stops21h 40m
Multiple Airlines
Wed 6/510:30 a.m.
MDW
-
YXU
3 stops17h 50m
Multiple Airlines
Deal found 23/3C$ 1,305
Wed 1/78:40 p.m.
YXU
-
MDW
3 stops18h 55m
Multiple Airlines
Sat 4/79:20 a.m.
MDW
-
YXU
3 stops27h 30m
Multiple Airlines
Deal found 23/3C$ 1,851
Mon 4/56:10 a.m.
YXU
-
MDW
2 stops12h 48m
WestJet
Wed 6/59:29 a.m.
MDW
-
YXU
2 stops18h 51m
WestJet
Deal found 23/3C$ 1,869
Wed 6/56:10 a.m.
YXU
-
MDW
3 stops33h 25m
Multiple Airlines
Wed 13/510:25 a.m.
MDW
-
YXU
3 stops17h 55m
Multiple Airlines
Deal found 21/3C$ 1,870

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 24 March 2026.

Round-trip from

C$ 671

One-way from

C$ 380
Air Canada
  • Air Canada
  • 6/5-13/5
  • 4 total stops
  • 16h 36m total
  • London to Illinois
Search Deals
Air Canada
  • Air Canada
  • 4/5
  • 1 total stop
  • 4h 55m 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 24 March 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

Sat 2/5

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

2 stops8h 48m

Chicago O'Hare Intl

Mon 4/5

3:50 p.m.-9:38 p.m.

1 stop4h 48m

C$ 675

LondonChicago

YXU - ORD

YXUORD

London

Wed 6/5

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

1 stop4h 55m

Chicago O'Hare Intl

Wed 13/5

2:15 p.m.-9:38 p.m.

1 stop6h 23m

C$ 676

LondonChicago

YXU - ORD

YXUORD

London

Thu 30/4

9:25 a.m.-1:05 p.m.

1 stop4h 40m

Chicago O'Hare Intl

Mon 4/5

3:50 p.m.-9:38 p.m.

1 stop4h 48m

C$ 700
Quickest round-trip

LondonChicago

YXU - ORD

YXUORD

London

Fri 31/7

9:30 a.m.-1:22 p.m.

1 stop4h 52m

Chicago O'Hare Intl

Sun 2/8

9:50 a.m.-2:55 p.m.

1 stop4h 05m

C$ 705

LondonChicago

YXU - ORD

YXUORD

London

Sun 24/5

5:10 a.m.-9:05 a.m.

1 stop4h 55m

Chicago O'Hare Intl

Sun 24/5

3:50 p.m.-9:38 p.m.

1 stop4h 48m

C$ 735

LondonChicago

YXU - ORD

YXUORD

London

Fri 8/5

9:30 a.m.-2:55 p.m.

1 stop6h 25m

Chicago O'Hare Intl

Fri 15/5

8:20 p.m.-11:43 a.m.

1 stop14h 23m

C$ 735

LondonChicago

YXU - ORD

YXUORD

London

Mon 4/5

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

1 stop4h 55m

Chicago O'Hare Intl

Wed 6/5

12:55 p.m.-9:38 p.m.

2 stops7h 43m

C$ 784

LondonChicago

YXU - ORD

YXUORD

London

Sat 16/5

12:20 p.m.-6:58 p.m.

2 stops7h 38m

Chicago O'Hare Intl

Sun 24/5

10:43 a.m.-5:33 p.m.

1 stop5h 50m

C$ 784

LondonChicago

YXU - MDW

YXUMDW

London

Sat 16/5

6:10 a.m.-6:33 p.m.

2 stops13h 23m

Chicago Midway

Sun 24/5

1:22 p.m.-5:20 a.m.

2 stops14h 58m

C$ 1,448

LondonChicago

YXU - MDW

YXUMDW

London

Mon 4/5

6:10 a.m.-5:58 p.m.

2 stops12h 48m

Chicago Midway

Wed 6/5

9:29 a.m.-5:20 a.m.

2 stops18h 51m

C$ 1,869

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/3

Showing 1-10 of 30 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

What is the cheapest month to book a flight from London, Ontario to Illinois?

Currently, January is the cheapest month in which you can book a flight from London, Ontario to Illinois (average of C$ 176). Flying from London, Ontario to Illinois in April is currently the most expensive (average of C$ 291). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated 24 March 2026.
Read reviews from past customers who have flown Air Canada from London to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,837 reviews
Check prices

Boarding

7.3

Crew

7.8

Entertainment

6.8

Overall

7.1

Comfort

7.1

Food

6.3

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.
Air Canada
7.1
Good
10,837 reviews
Air Canada
7.1
Good
10,837 reviews
Check prices

Boarding

7.3

Crew

7.8

Entertainment

6.8

Overall

7.1

Comfort

7.1

Food

6.3

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.

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 8h 48m. Fly via Air Canada 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.

  • What is the cheapest month to book a flight from London, Ontario to Illinois?

    Currently, January is the cheapest month in which you can book a flight from London, Ontario to Illinois (average of C$ 176). Flying from London, Ontario to Illinois in April is currently the most expensive (average of C$ 291). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 Newark flights
Pierre Elliott Trudeau Intl to Miami flights
Pearson Intl to John F Kennedy Intl flights
Pierre Elliott Trudeau Intl to Fort Lauderdale flights
Pearson Intl to Fort Lauderdale flights
Pearson Intl to Miami flights
Pearson Intl to Las Vegas flights
Pearson Intl to LaGuardia flights
Pearson Intl to Orlando flights
Pierre Elliott Trudeau Intl to Newark flights
Pierre Elliott Trudeau Intl to LaGuardia flights
Pierre Elliott Trudeau Intl to John F Kennedy Intl flights
Pearson Intl to Los Angeles flights
Pearson Intl to Reagan-National flights
Pearson Intl to Dallas/Fort Worth flights
Pearson Intl to Seattle flights
Pearson Intl to O'Hare Intl flights
Pierre Elliott Trudeau Intl to Orlando flights
Toronto Island to Fort Lauderdale flights
Pearson Intl to Tampa flights
Pierre Elliott Trudeau Intl to Los Angeles flights
Toronto Island to LaGuardia flights
Pearson Intl to Nashville flights
Pearson Intl to Dulles Intl flights
Pearson Intl to Hobby flights
Pearson Intl to George Bush Intcntl flights
Pierre Elliott Trudeau Intl to Las Vegas flights
Pearson Intl to San Francisco flights
Pearson Intl to West Palm Beach flights
Pearson Intl to Atlanta flights
Toronto Island to Orlando flights
Toronto Island to Miami flights
Toronto Island to Las Vegas flights
Pearson Intl to Boston flights
Pierre Elliott Trudeau Intl to O'Hare Intl flights
Pearson Intl to Fort Myers flights
Pierre Elliott Trudeau Intl to Nashville flights
Toronto Island to Dulles Intl flights
Pierre Elliott Trudeau Intl to Dallas/Fort Worth flights
Pierre Elliott Trudeau Intl to West Palm Beach flights
Pearson Intl to Baltimore flights
Pearson Intl to Sky Harbor Intl flights
Pearson Intl to Midway flights
Toronto Island to Midway flights
Pearson Intl to Ontario flights
Pierre Elliott Trudeau Intl to San Francisco flights
Toronto Island to Boston flights
Pierre Elliott Trudeau Intl to Reagan-National flights
Pearson Intl to San Diego 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.