Cheap flights from Ontario to London from £221

In general, May is the cheapest month to fly from Region of Ontario to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £429. The month of October is another great option to travel to London Heathrow Airport, with average flight prices from Region of Ontario averaging around £436.

On average, the least expensive day to fly to London Heathrow Airport from Region of Ontario is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £534. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Monday is £567.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Region of Ontario to London Heathrow Airport in the afternoon for as low as £547. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are £559 on average. Flights to London Heathrow Airport from Region of Ontario in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from Toronto Pearson Intl to London Heathrow for the best Ontario - London Heathrow flight prices

You are more likely to see cheaper flights to London Heathrow Airport from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £507 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Region of Ontario for as low as £463 on momondo.

There are 3 cabin classes available to choose from on Ontario to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

TAP AIR PORTUGAL, WestJet, and United Airlines are the most popular carriers operating from Ontario to London Heathrow

Air Canada, British Airways and Virgin Atlantic are the top three most popular airlines that fly to London Heathrow Airport from Region of Ontario according to our data. Air Canada is the first choice among our users, with 76% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 10 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

As of March 2026, 24 flights take off from Region of Ontario and land in London Heathrow Airport each day. The most common flight departure time for this route is 18:00, with 100% of daily flights taking off in the evening.

As of March 2026, 168 flights take off from Region of Ontario and land in London Heathrow Airport each week. The most common flight departure day for this route is Wed, with 31% of weekly flights taking off on this day.