Cheap flights from Ottawa to London from £241

The cheapest month to fly to London from Ottawa is in September. Flight prices, which tend to average around £454, 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 Ottawa averaging around £513.

Our data shows that Friday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £551. 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 £750.

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £588. Flights in the afternoon are often more expensive, with an average ticket price of £664.

Fly from Ottawa to London Heathrow 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 £614 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 £555 on momondo.

There is only 1 cabin class available to choose from on Ottawa to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

No. A direct flight is the cheapest option for a flight between Ottawa to London.

As of October 2026, prices for Ottawa to London flights are approximately 7% cheaper when compared to flights at the same time last year.

Historically, on average around 28% 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 132 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.

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

According to our data, Air Transat have had the fewest delays on this route over the last 12 months, with about 20% of their flights experiencing any sort of delay.

1 flights are operational daily from Ottawa to London as of October 2026. The most popular departure time for this route is 22:00, with 100% of flights per day taking off in the evening.

7 flights are operational weekly from Ottawa to London as of October 2026. The most popular departure day for this route is Thu, with 100% of flights per week taking off on this day.