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Cheap flights from Illinois to London, ON from C$ 286

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 27/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YXU
19 May — 26 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 14 May 2025.

Round-trip from

C$ 689

One-way from

C$ 286
Air Canada
  • Air Canada
  • 27/6-4/7
  • 2 total stops
  • 9h 03m total
  • Illinois to London
Search Deals
27/6
  • 27/6
  • 2 total stops
  • 22h 34m 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 14 May 2025.

Fri 27/610:00 a.m.ORD - YXU
1 stop3h 57mAir Canada
Fri 4/79:55 a.m.YXU - ORD
1 stop5h 06mAir Canada
Deal found 13/5C$ 689
Mon 23/66:00 a.m.ORD - YXU
2 stops7h 57mUnited Airlines
Mon 30/63:35 p.m.YXU - ORD
2 stops9h 02mUnited Airlines
Deal found 13/5C$ 813
Mon 23/67:42 a.m.ORD - YXU
3 stops20h 32mMultiple Airlines
Mon 30/69:45 p.m.YXU - ORD
3 stops33h 27mMultiple Airlines
Deal found 13/5C$ 930
Fri 6/64:32 p.m.STL - YXU
2 stops21h 27mUnited Airlines
Sun 8/66:15 a.m.YXU - STL
2 stops15h 33mUnited Airlines
Deal found 12/5C$ 1,101
Fri 6/67:30 a.m.STL - YXU
1 stop6h 29mAir Canada
Sun 8/69:55 a.m.YXU - STL
2 stops11h 03mAir Canada
Deal found 12/5C$ 1,145
Thu 26/66:36 p.m.STL - YXU
2 stops33h 38mMultiple Airlines
Thu 3/76:00 a.m.YXU - STL
3 stops30h 30mMultiple Airlines
Deal found 12/5C$ 1,778

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 14 May 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 27/6

10:00 a.m.-2:57 p.m.

1 stop3h 57m

London

Fri 4/7

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

1 stop5h 06m

C$ 689

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 23/6

6:00 a.m.-2:57 p.m.

2 stops7h 57m

London

Mon 30/6

3:35 p.m.-11:37 p.m.

2 stops9h 02m

C$ 813

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Mon 23/6

7:42 a.m.-5:14 a.m.

3 stops20h 32m

London

Mon 30/6

9:45 p.m.-6:12 a.m.

3 stops33h 27m

C$ 930

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Fri 6/6

4:32 p.m.-2:59 p.m.

2 stops21h 27m

London

Sun 8/6

6:15 a.m.-8:48 p.m.

2 stops15h 33m

C$ 1,101

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Fri 6/6

7:30 a.m.-2:59 p.m.

1 stop6h 29m

London

Sun 8/6

9:55 a.m.-7:58 p.m.

2 stops11h 03m

C$ 1,145

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Thu 26/6

6:36 p.m.-5:14 a.m.

2 stops33h 38m

London

Thu 3/7

6:00 a.m.-11:30 a.m.

3 stops30h 30m

C$ 1,778

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 27/6

5:40 a.m.-5:14 a.m.

2 stops22h 34m

C$ 286

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 27/6

10:00 a.m.-2:57 p.m.

1 stop3h 57m

C$ 353

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 4/7

8:50 a.m.-2:57 p.m.

1 stop5h 07m

C$ 356

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/5

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 14 May 2025.
Peruse reviews from past customers who have flown with United Airlines and Air Canada from Illinois to London to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,726 reviews
Check prices

Food

6.6

Crew

8.1

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

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
8,726 reviews
United Airlines
7.4
Good
8,726 reviews
Check prices

Food

6.6

Crew

8.1

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

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
9,331 reviews
United Airlines
7.4
Good
8,726 reviews
Check prices

Food

6.6

Crew

8.1

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

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.

  • 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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