Flight deals from London to Ontario

We've found these cheap flights for you. You can book one-way or return flight tickets.

Round-trip
One way

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

Find the best time to fly from London to Ontario

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights

From price

May

27 4
4 11
11 18
18 25
Jun

25 1
1 8
8 15
15 22
22 29
Jul

29 6
6 13
13 20

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

FAQ

When are flight tickets from London (LON) to Ontario (ONT) the cheapest?

Airlines adjust prices for flights from London to Ontario based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much are flights from London (LON) to Ontario (ONT) cost?

According to Trip.com's data, the lowest price is around €1,232.

How to find a cheap flight from London to Ontario

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 London to Ontario. Book your flights at the right time and save more.

Be flexible with your travel dates to get the cheapest flight from London to Ontario.

Simply tap "Date" on the flight search bar to browse through the calendar and check out airfare from London to Ontario over the next 6 months in 2025. If you're planning to fly within the next three months, it looks like the most affordable option is on Wed, Jun 4, with one-way flights priced at just €326.

Compare cheap flight deals from London to Ontario across hundreds of airlines.

With our extensive search, you can compare prices from over 500 airlines to find the cheapest flight tickets from London to Ontario. The cheapest airline for this route is Norse Atlantic Airways.

Set up a Price Alert

By setting up a Price Alert for your journey from London to Ontario, you can easily keep an eye on ticket prices without having to check every day.

Don't miss out on cheap flight deals and promo codes from London to Ontario.

You can always find the latest offers through Trip.com Deals and Promo Codes for cheap flights. By signing up for a free membership, you'll get access to even more deals for your flights.

Book early or wait until the last minute.

It's usually best to book early. Flight tickets are often cheapest when they're first released, typically about a year before the departure date. So, have a look online as soon as the flights you're interested in become available. If you miss the cheapest time, you might still find some good deals as the departure date gets closer.

Search for flights on the go.

For the best travel flight booking experience, download the Trip.com app. You can search for cheap flights from London to Ontario and snag some exclusive deals just for you.

Flight Information from London to Ontario

Cheapest one-way flight price	€351
Cheapest return ticket price	€467
Off-season travel month	February
Peak season for travel	September
Flight distance	5,726.56km
Popular airline	Delta Air Lines

Cheap flights from London to Ontario

If you’re looking to book cheap flights from London to Ontario, Trip.com has you covered. Many people travel from London to Ontario for the city’s world-famous sights, delicious American cuisine and unrivalled shopping scene. A convenient destination, you can fly from London to Ontario in just over 7 hours 15 mins, making it the perfect place for a short city break, or even a gateway to explore the rest of United States. With prices starting from just £325, there’s never been a better time to book tickets from London to Ontario and experience all that this incredible city has to offer.

How to find a cheap flights from London to Ontario

Finding cheap flights from London to Ontario is easy with our money-saving tips. You can secure the best deals by booking in advance, flying on a weekday rather than a weekend, going incognito when browsing for flights, and choosing to fly with better-priced budget airlines.