HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$238+ Cheap flights from London, ON (YXU) to Illinois

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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — ORD
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from London to Illinois with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from London to Illinois

Keep the following information in mind while searching for London to Illinois flight deals. Data was last updated July 3, 2025.

Round-trip from

$393
(Air Canada)

One-way from

$238
(Air Canada)
From London to Illinois
Search Deals
One-way flight from London to Illinois
Search Deals

Find flight deals from London to Illinois

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 July 3, 2025.

This Air Canada deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/39:55 amYXU - ORD
1 stop4h 19mAir Canada
Mon 10/63:50 pmORD - YXU
1 stop4h 37mAir Canada
Deal found 7/3$393
This United deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/36:15 amYXU - ORD
1 stop3h 58mMultiple Airlines
Mon 10/610:40 amORD - YXU
2 stops9h 47mMultiple Airlines
Deal found 7/3$481
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/156:15 amYXU - ORD
1 stop4h 40mUnited Airlines
Fri 8/2210:48 amORD - YXU
1 stop5h 19mUnited Airlines
Deal found 7/1$510
This Mytrip deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/168:00 pmYXU - MDW
3 stops21h 24mMultiple Airlines
Fri 7/189:40 amMDW - YXU
3 stops18h 34mMultiple Airlines
Deal found 7/1$1,322
This WestJet deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/38:00 pmYXU - MDW
2 stops14h 48mWestJet
Mon 10/62:00 pmMDW - YXU
2 stops14h 12mWestJet
Deal found 7/3$1,529

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 2,558,603 searches. Data last updated July 3, 2025.
Use the filters below to find and compare flights from London to Illinois that are best for you.

Fly from

London

Fly to

Illinois

Route

Depart

Return

Price

LondonChicago

YXU - ORD

YXUORD

London

Fri 10/3

9:55 am-1:14 pm

1 stop4h 19m

Chicago O'Hare Intl

Mon 10/6

3:50 pm-9:27 pm

1 stop4h 37m

$393

LondonChicago

YXU - ORD

YXUORD

London

Fri 10/3

6:15 am-9:13 am

1 stop3h 58m

Chicago O'Hare Intl

Mon 10/6

10:40 am-9:27 pm

2 stops9h 47m

$481

LondonChicago

YXU - ORD

YXUORD

London

Fri 8/15

6:15 am-9:55 am

1 stop4h 40m

Chicago O'Hare Intl

Fri 8/22

10:48 am-5:07 pm

1 stop5h 19m

$510

LondonChicago

YXU - MDW

YXUMDW

London

Wed 7/16

8:00 pm-4:24 pm

3 stops21h 24m

Chicago Midway

Fri 7/18

9:40 am-5:14 am

3 stops18h 34m

$1,322

LondonChicago

YXU - MDW

YXUMDW

London

Fri 10/3

8:00 pm-9:48 am

2 stops14h 48m

Chicago Midway

Mon 10/6

2:00 pm-5:12 am

2 stops14h 12m

$1,529

LondonChicago

YXU - ORD

YXUORD

London

Sun 8/17

3:40 pm-7:29 pm

1 stop4h 49m

$238

LondonChicago

YXU - ORD

YXUORD

London

Tue 7/15

6:00 am-6:03 am

2 stops25h 03m

$275

LondonChicago

YXU - MDW

YXUMDW

London

Sun 8/17

8:00 pm-4:24 pm

3 stops21h 24m

$352

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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, August is the cheapest month in which you can book a flight from London, Ontario to Illinois (average of $245). Flying from London, Ontario to Illinois in March is currently the most expensive (average of $321). 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.

How much does it cost to fly round-trip from London, Ontario to Illinois?

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 July 3, 2025.
See what other customers who have flown with United Airlines, WestJet, and Air Canada from London to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,861 reviews

Entertainment

7.0

Crew

8.1

Food

6.6

Comfort

7.3

Boarding

7.7

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
8,861 reviews
United Airlines
7.4
Good
8,861 reviews

Entertainment

7.0

Crew

8.1

Food

6.6

Comfort

7.3

Boarding

7.7

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
2,917 reviews
United Airlines
7.4
Good
8,861 reviews

Entertainment

7.0

Crew

8.1

Food

6.6

Comfort

7.3

Boarding

7.7

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
7.1
Good
9,681 reviews
United Airlines
7.4
Good
8,861 reviews

Entertainment

7.0

Crew

8.1

Food

6.6

Comfort

7.3

Boarding

7.7

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 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?

    London (YXU) is the airport you will fly out of if you book a flight from London to Illinois. It is only a 5.3 mi journey to London (YXU) from London’s city center.

  • 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, August is the cheapest month in which you can book a flight from London, Ontario to Illinois (average of $245). Flying from London, Ontario to Illinois in March is currently the most expensive (average of $321). 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.
Pearson Intl to Newark flights
Toronto Island to Newark flights
Pearson Intl to LaGuardia flights
Pearson Intl to John F Kennedy Intl flights
Pierre Elliott Trudeau Intl to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to LaGuardia flights
Pearson Intl to Los Angeles flights
Pierre Elliott Trudeau Intl to John F Kennedy Intl flights
Pearson Intl to Las Vegas flights
Pearson Intl to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to Newark flights
Pearson Intl to San Francisco flights
Pearson Intl to Miami flights
Pierre Elliott Trudeau Intl to Miami flights
Pearson Intl to Orlando flights
Pearson Intl to O'Hare Intl flights
Pearson Intl to Dulles Intl flights
Pearson Intl to Reagan-National flights
Pearson Intl to Dallas/Fort Worth flights
Pierre Elliott Trudeau Intl to O'Hare Intl flights
Pearson Intl to Hobby flights
Pierre Elliott Trudeau Intl to Las Vegas flights
Pearson Intl to Boston flights
Pierre Elliott Trudeau Intl to Orlando flights
Pearson Intl to Seattle flights
Toronto Island to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to Los Angeles flights
Pearson Intl to George Bush Intcntl flights
Pearson Intl to Atlanta flights
Toronto Island to Boston flights
Toronto Island to Dulles Intl flights
Toronto Island to Midway flights
Pearson Intl to Tampa flights
Pearson Intl to San Diego flights
Toronto Island to Orlando flights
Pearson Intl to Nashville flights
Pearson Intl to Midway flights
Ottawa to Newark flights
Pearson Intl to Baltimore flights
Pierre Elliott Trudeau Intl to San Francisco flights
Pierre Elliott Trudeau Intl to Nashville flights
Pearson Intl to Honolulu flights
Pearson Intl to Philadelphia flights
Pierre Elliott Trudeau Intl to Dulles Intl flights
Pearson Intl to Sky Harbor Intl flights
Pierre Elliott Trudeau Intl to Philadelphia flights
Pierre Elliott Trudeau Intl to Midway flights
Pierre Elliott Trudeau Intl to Boston flights
Pearson Intl to Austin flights

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.