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Cheap flights from Illinois to London, ON from C$ 269

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 17/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YXU
5 May — 12 May1
1 adult

Cheap flight deals from Illinois to London

Keep the following information in mind while searching for Illinois to London flight deals. Data was last updated 30 April 2025.

Round-trip from

C$ 689

One-way from

C$ 269
Air Canada
  • Air Canada
  • 13/6-20/6
  • 3 total stops
  • 21h 20m total
  • Illinois to London
Search Deals
17/6
  • 17/6
  • 2 total stops
  • 26h 30m total
  • Illinois to London
Search Deals

Find flight deals from Illinois to London

Cheapest flights from Illinois to London
Explore the most affordable flight options available from Illinois to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2025.

Fri 13/69:45 p.m.ORD - YXU
2 stops16h 14mAir Canada
Fri 20/69:55 a.m.YXU - ORD
1 stop5h 06mAir Canada
Deal found 29/4C$ 689
Fri 16/56:59 p.m.ORD - YXU
2 stops23h 11mMultiple Airlines
Fri 30/56:00 a.m.YXU - ORD
2 stops25h 42mMultiple Airlines
Deal found 29/4C$ 695
Thu 12/69:14 p.m.ORD - YXU
1 stop11h 04mUnited Airlines
Thu 19/63:35 p.m.YXU - ORD
1 stop4h 54mUnited Airlines
Deal found 29/4C$ 804

Cheapflights Fare Finder

Customize your flight search to find flights from Illinois to London 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 30 April 2025.
Use the filters below to find and compare flights from Illinois to London that are best for you.

Fly from

Illinois

Fly to

London

Route

Depart

Return

Price

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 13/6

9:45 p.m.-2:59 p.m.

2 stops16h 14m

London

Fri 20/6

9:55 a.m.-2:01 p.m.

1 stop5h 06m

C$ 689

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 16/5

6:59 p.m.-7:10 p.m.

2 stops23h 11m

London

Fri 30/5

6:00 a.m.-6:42 a.m.

2 stops25h 42m

C$ 695

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 12/6

9:14 p.m.-9:18 a.m.

1 stop11h 04m

London

Thu 19/6

3:35 p.m.-7:29 p.m.

1 stop4h 54m

C$ 804

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Tue 17/6

5:30 p.m.-9:00 p.m.

2 stops26h 30m

C$ 269

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Tue 17/6

10:00 a.m.-2:59 p.m.

1 stop3h 59m

C$ 293

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sat 10/5

5:30 p.m.-7:10 p.m.

1 stop24h 40m

C$ 454

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Fri 13/6

7:30 a.m.-2:58 p.m.

1 stop6h 28m

C$ 537

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/4

Best time to book a flight from Illinois to London

Have a flexible travel schedule? Discover the best time to fly to London from Illinois 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 Illinois to London

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

Currently, October is the cheapest month in which you can book a flight from Illinois to London, Ontario (average of C$ 243). Flying from Illinois to London, Ontario in December is currently the most expensive (average of C$ 478). 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.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London, Ontario ranges from 70.0 - 100.0 mm per month. January is typically the wettest month, when rainfall can reach 100.0 mm. March is typically the driest time to visit London, Ontario when rainfall is around 70.0 mm.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 20.0 C. Travellers hoping to avoid the cold should look outside of February, when temperatures are typically at their lowest (around -6.0 C).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 30 April 2025.
United Airlines
7.4
Good
8,696 reviews
Check prices

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,696 reviews
United Airlines
7.4
Good
8,696 reviews
Check prices

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
WestJet
7.2
Good
2,826 reviews
United Airlines
7.4
Good
8,696 reviews
Check prices

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.0
Good
9,242 reviews
United Airlines
7.4
Good
8,696 reviews
Check prices

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Illinois to London. 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 into for flights to London from Illinois?

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

  • What are the cheapest airlines to fly from Illinois to London, Ontario one-way?

    To fly one-way, consider booking your trip with Air Canada, which is currently one of the cheapest options available, starting at C$ 293. WestJet flights start at C$ 454 while deals on United Airlines start at C$ 537 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to London 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 Illinois to London, Ontario?

    Currently, October is the cheapest month in which you can book a flight from Illinois to London, Ontario (average of C$ 243). Flying from Illinois to London, Ontario in December is currently the most expensive (average of C$ 478). 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

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