Cheap flights from Ottawa to London from £189

The cheapest month to fly to London from Ottawa is in February. Flight prices, which tend to average around £286, are often lower during this time because this is during the off-season. The month of March is another great option to travel to London, with average flight prices from Ottawa averaging around £333.

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 £575. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Ottawa to London for around £658.

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £582. Flights in the afternoon are often more expensive, with an average ticket price of £610.

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

You are more likely to see cheaper flights to London from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £585 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 Ottawa for as low as £539 on momondo.

You could potentially save up to 55% on your flight if you consider stops on a Ottawa to London flight.

As of April 2026, prices for Ottawa to London flights are approximately 90% more expensive when compared to flights at the same time last year.

Historically, on average around 25% of flights between Ottawa and London have experienced a delay on any given week. The average delay length over the past 12 months has been 143 minutes.

Generally, flights departing in the evening tend to experience fewer delays. Flights departing at night have, in the past, seen delays more frequently in comparison.

Monday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, Air Canada have had the fewest delays on this route over the last 12 months, with about 25% of their flights experiencing any sort of delay.

3 flights are operational daily from Ottawa to London as of April 2026. The most popular departure time for this route is 21:00, with 100% of flights per day taking off in the evening.

22 flights are operational weekly from Ottawa to London as of April 2026. The most popular departure day for this route is Mon, with 32% of flights per week taking off on this day.