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Cheap flights from Illinois to London, ON from C$ 156

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 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YXU
26 Feb — 5 Mar1
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 21 February 2025.

Round-trip from

C$ 531

One-way from

C$ 156
WestJet
  • WestJet
  • 6/4-13/4
  • 2 total stops
  • 40h 23m total
  • Illinois to London
Search Deals
6/4
  • 6/4
  • 1 total stop
  • 22h 06m 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 21 February 2025.

Sun 6/42:53 p.m.ORD - YXU
1 stop19h 27mMultiple Airlines
Sun 13/48:00 p.m.YXU - ORD
1 stop20h 56mMultiple Airlines
Deal found 20/2C$ 531
Sun 6/44:57 p.m.STL - YXU
1 stop17h 23mMultiple Airlines
Sun 13/48:00 p.m.YXU - STL
2 stops22h 56mMultiple Airlines
Deal found 20/2C$ 687
Sun 6/410:53 a.m.ORD - YXU
2 stops8h 25mAir Canada
Sun 13/45:15 a.m.YXU - ORD
2 stops7h 48mAir Canada
Deal found 20/2C$ 957
Sat 8/114:15 p.m.STL - YXU
1 stop4h 30mAir Canada
Fri 14/119:45 a.m.YXU - STL
1 stop6h 41mAir Canada
Deal found 19/2C$ 1,244
Sat 5/49:39 a.m.STL - YXU
2 stops9h 39mUnited Airlines
Sat 12/49:55 a.m.YXU - STL
1 stop5h 54mUnited Airlines
Deal found 19/2C$ 1,258
Fri 21/39:05 a.m.ORD - YXU
2 stops10h 15mUnited Airlines
Fri 28/35:15 a.m.YXU - ORD
2 stops10h 26mUnited Airlines
Deal found 19/2C$ 1,401
Sat 22/311:31 a.m.ORD - YXU
2 stops30h 42mWestJet
Sun 30/38:00 p.m.YXU - ORD
2 stops26h 47mWestJet
Deal found 19/2C$ 3,193

Find flights from Illinois to London within your budget

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 21 February 2025.

Fly from

Illinois

Fly to

London

Route

Depart

Return

Price

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sun 6/4

2:53 p.m.-11:20 a.m.

1 stop19h 27m

London

Sun 13/4

8:00 p.m.-3:56 p.m.

1 stop20h 56m

C$ 531

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Sun 6/4

4:57 p.m.-11:20 a.m.

1 stop17h 23m

London

Sun 13/4

8:00 p.m.-5:56 p.m.

2 stops22h 56m

C$ 687

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sun 6/4

10:53 a.m.-8:18 p.m.

2 stops8h 25m

London

Sun 13/4

5:15 a.m.-12:03 p.m.

2 stops7h 48m

C$ 957

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sun 29/6

1:40 p.m.-5:14 a.m.

2 stops14h 34m

London

Sat 5/7

8:00 p.m.-12:39 p.m.

2 stops17h 39m

C$ 1,072

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Sat 5/4

9:39 a.m.-8:18 p.m.

2 stops9h 39m

London

Sat 12/4

9:55 a.m.-2:49 p.m.

1 stop5h 54m

C$ 1,258

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Sat 5/4

3:30 p.m.-9:13 a.m.

1 stop16h 43m

London

Sat 12/4

9:55 a.m.-2:49 p.m.

1 stop5h 54m

C$ 1,389

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 21/3

9:05 a.m.-8:20 p.m.

2 stops10h 15m

London

Fri 28/3

5:15 a.m.-2:41 p.m.

2 stops10h 26m

C$ 1,401

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Sun 6/4

12:14 p.m.-11:20 a.m.

1 stop22h 06m

C$ 156

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/2

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.

Travel insights for flights from Illinois to London

Get recent, data-driven insights about flights from Illinois to London including ideal travel times, pricing trends, and more.

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 April is currently the most expensive (average of C$ 496). 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 21 February 2025.
Peruse reviews from past customers who have flown with United Airlines, WestJet 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
8,765 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.7

Overall

7.4

Reviews

1 / 20

2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

United Airlines
7.4
Good
8,765 reviews
United Airlines
7.4
Good
8,765 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.7

Overall

7.4

Reviews

1 / 20

2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

WestJet
7.2
Good
2,801 reviews
United Airlines
7.4
Good
8,765 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.7

Overall

7.4

Reviews

1 / 20

2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Air Canada
7.0
Good
8,748 reviews
United Airlines
7.4
Good
8,765 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.7

Overall

7.4

Reviews

1 / 20

2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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 April is currently the most expensive (average of C$ 496). 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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