$311 Find Cheap Flights from Ontario to London

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Find cheap flights from Ontario to London starting at $311.

Book one-way or return flights from Ontario to London from as little as $311. Choose from the popular airlines below and book your flight today!

One way
Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Searching for the best last minute flight from Ontario to London? Find one-way or return flights that are affordable and fit your itinerary.

Trip.com monitors the ticket fares of flights from Ontario to London. Stay updated on price trends and snag the best deals for your upcoming trip.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Find cheap airlines flights from Ontario to London

View airlines operating flights from Ontario to London. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines

From $223

Alaska Airlines

From $296

Jetblue Airways

From $311

Southwest Airlines

From $337

United Airlines

From $365

Delta Air Lines

From $374

American Airlines

From $410

Iberia

From $429

Virgin Atlantic

From $430

KLM

From $454

ANA airlines

Find more flights and airlines

Find cheap flights from Ontario to London by different airports

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from Ontario to London.

Cheapest
ONT
00:59
25h 1m
2 transfer
LGW
10:00
Ontario International Airport - London Gatwick Airport
Tue, May 7Frontier Airlines
$223
ONT
00:49
27h 16m
2 transfer
LHR
12:05
Ontario International Airport - London Heathrow Airport
Tue, May 21Frontier Airlines
$231
ONT
07:58
24h 12m
2 transfer
LCY
16:10
Ontario International Airport - London City Airport
Thu, May 9Frontier Airlines
$498
ONT
07:58
24h 12m
2 transfer
LCY
16:10
Ontario International Airport - London City Airport
Thu, May 9Frontier Airlines
$498
Find More Flights

Frequently Asked Questions

When are flight tickets from Ontario (ONT) to London (LON) the cheapest?
Airlines adjust prices for flights from Ontario to London based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much do flights from Ontario (ONT) to London (LON) cost?
According to Trip.com's data, the lowest price is around $893.
What is the transportation method from the main airport to downtown in London?
- The distance from London Gatwick Airport to downtown is about 39km. It takes about 50 minutes by taxi.
- The distance from London Heathrow Airport to downtown is about 23km. It takes about 40 minutes by taxi.
- The distance from London Luton Airport to downtown is about 44km. It takes about 1 hour by taxi.

How to find a cheap flight from Ontario to London

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Ontario to London. Book your flights at the right time and save more.

Book Early

Once prices are gone, they're gone. Lock in deals while you can!

Compare Flight Prices

Compare prices on travel agency and airline websites.

Look Out for Deals

Check airline and travel agency websites for latest flight deals

Check One-way Fares

Buying two cheap one-way flights can sometimes be a better deal than a round-trip.

Try Different Dates

Flying during the week, early in the morning, or late at night can help save money.

Use the Trip.com App

Save up to £10 per person when booking your flights on Trip.com

Ontario to London Flight Information

Cheapest nonstop flight price	$311
Cheapest round-trip ticket price	$446
Off-season for travel	September
Peak season for travel	September
Flight distance	5,726.56km
Popular airline	Delta Air Lines