Cheap flights from Ontario to London from £187

The cheapest month to fly to London from Region of Ontario is in February. Flight prices, which tend to average around £433, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from Region of Ontario averaging around £444.

Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £534. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Region of Ontario to London for around £621.

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £561. Flights in the evening are often more expensive, with an average ticket price of £575.

Fly from Ottawa to London Gatwick for the best Ontario - London flight prices

You are more likely to see cheaper flights to London from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £537 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Region of Ontario for as low as £489 on momondo.

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

Air Transat, Porter Airlines, and Aer Lingus are the most popular carriers operating from Ontario to London

Air Canada, Air Transat and British Airways are the top three most popular airlines that fly to London 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. Keep in mind that there are 9 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

As of July 2026, there are 63 flights per day flying from Region of Ontario to London. The most common time of day flights depart is 18:00, with 100% of flights taking off in the evening.

As of July 2026, there are 445 flights per week flying from Region of Ontario to London. The most common day of the week flights depart is Fri, with 16% of flights taking off on this day.