HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$261+ Cheap flights from London, ON (YXU) to Ontario (ONT)

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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — ONT
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from London to Ontario 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 Ontario

Discover tips and strategies to find the most affordable flight options for your journey from London (YXU) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 30, 2025.

Round-trip from

$609
(SmartFares)

One-way from

$261
(Kiwi.com)

Popular in

July

Cheapest in

June

Average price

$531
From London to Ontario
Search Deals
One-way flight from London to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($29 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from London to Ontario

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

This SmartFares deal was found by Cheapflights users on 7/30. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/226:00 amYXU - ONT
2 stops15h 28mMultiple Airlines
Tue 8/263:04 pmONT - YXU
2 stops11h 10mMultiple Airlines
Deal found 7/30$609
This United Airlines deal was found by Cheapflights users on 7/29. 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 9/123:50 pmYXU - ONT
2 stops31h 43mUnited Airlines
Fri 9/195:10 amONT - YXU
2 stops31h 07mUnited Airlines
Deal found 7/29$636
This Mytrip deal was found by Cheapflights users on 7/29. 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.
Fri 9/126:00 amYXU - ONT
2 stops14h 00mWestJet
Fri 9/196:00 amONT - YXU
3 stops20h 12mWestJet
Deal found 7/29$989
This Air Canada deal was found by Cheapflights users on 7/29. 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.
Tue 8/56:25 amYXU - ONT
2 stops9h 07mAir Canada
Tue 8/126:39 pmONT - YXU
2 stops11h 38mAir Canada
Deal found 7/29$1,992

Cheapflights Fare Finder

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

Fly from

London

Fly to

Ontario

Route

Depart

Return

Price

LondonOntario

YXU - ONT

YXUONT

London

Fri 8/22

6:00 am-6:28 pm

2 stops15h 28m

Ontario

Tue 8/26

3:04 pm-5:14 am

2 stops11h 10m

$609

LondonOntario

YXU - ONT

YXUONT

London

Fri 9/12

3:50 pm-8:33 pm

2 stops31h 43m

Ontario

Fri 9/19

5:10 am-3:17 pm

2 stops31h 07m

$636

LondonOntario

YXU - ONT

YXUONT

London

Fri 9/12

6:00 am-5:00 pm

2 stops14h 00m

Ontario

Fri 9/19

6:00 am-5:12 am

3 stops20h 12m

$989

LondonOntario

YXU - ONT

YXUONT

London

Fri 9/12

8:00 pm-7:17 am

2 stops38h 17m

$261

LondonOntario

YXU - ONT

YXUONT

London

Sat 9/13

6:10 am-8:43 pm

2 stops17h 33m

$350

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Best time to book a flight from London to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario 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 Ontario

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

Currently, August is the cheapest month in which you can book a flight from London, Ontario to Ontario (average of $246). Flying from London, Ontario to Ontario in March is currently the most expensive (average of $328). 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 Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated July 30, 2025.
Read through reviews of airlines operating flights from London to Ontario, such as United Airlines and WestJet. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,896 reviews

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
United Airlines
7.4
Good
8,896 reviews
United Airlines
7.4
Good
8,896 reviews

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
WestJet
7.2
Good
2,975 reviews
United Airlines
7.4
Good
8,896 reviews

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.

Related info for your journey

Find useful and relevant information for your journey from London to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from London, Ontario to Ontario (average of $246). Flying from London, Ontario to Ontario in March is currently the most expensive (average of $328). 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 Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Los Angeles flights
Pearson Intl to Las Vegas flights
Pearson Intl to San Francisco flights
Pierre Elliott Trudeau Intl to Los Angeles flights
Pierre Elliott Trudeau Intl to Las Vegas flights
Pearson Intl to San Diego flights
Pierre Elliott Trudeau Intl to San Francisco flights
Pearson Intl to Ontario flights
Toronto Island to Los Angeles flights
Toronto Island to San Francisco flights
Ottawa to Las Vegas flights
Pearson Intl to San Jose flights
Pierre Elliott Trudeau Intl to San Diego flights
Pierre Elliott Trudeau Intl to Ontario flights
Hamilton to Las Vegas flights
Hamilton to San Francisco flights
Ottawa to Los Angeles flights
Pearson Intl to Palm Springs flights
Pearson Intl to Sacramento flights
Region of Waterloo Intl to Las Vegas flights
Region of Waterloo Intl to San Francisco flights
Pearson Intl to Santa Ana flights
Hamilton to Los Angeles flights
Pearson Intl to Fresno flights
Toronto Island to San Diego flights
Pearson Intl to Burbank flights
Ottawa to Ontario flights
Ottawa to San Francisco flights
Pierre Elliott Trudeau Intl to Sacramento flights
Pierre Elliott Trudeau Intl to Santa Ana flights
Hamilton to Santa Ana flights
Pearson Intl to Oakland flights
Pearson Intl to Reno flights
Hamilton to San Diego flights
Pierre Elliott Trudeau Intl to San Jose flights
Ottawa to Santa Ana flights
Ottawa to San Diego flights
Pierre Elliott Trudeau Intl to Reno flights
Region of Waterloo Intl to Santa Ana flights
Pierre Elliott Trudeau Intl to Palm Springs flights
Hamilton to San Jose flights
Hamilton to Ontario flights
Region of Waterloo Intl to San Jose flights
Windsor to Las Vegas flights
Pierre Elliott Trudeau Intl to Burbank flights
Hamilton to Sacramento flights
Ottawa to San Jose 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.