Cheap flights from Ottawa to London from £250

In general, November is the cheapest month to fly from Ottawa to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £516. The month of January is another great option to travel to London Heathrow Airport, with average flight prices from Ottawa averaging around £535.

On average, the least expensive day to fly to London Heathrow Airport from Ottawa is on a Monday. momondo users have found tickets for Monday departures for as low as £546. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Sunday is £1,005.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Ottawa to London Heathrow Airport in the evening for as low as £582. 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 afternoon when prices are £583 on average. Flights to London Heathrow Airport from Ottawa in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to London Heathrow Airport from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £583 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 Ottawa for as low as £545 on momondo.

There are 2 cabin classes available to choose from on Ottawa to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

As of March 2026, prices for Ottawa to London Heathrow Airport flights are approximately 44% more expensive when compared to flights at the same time last year.

Historically, on average around 24% 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 134 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. Friday 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 24% of their flights experiencing any sort of delay.

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

16 flights are operational weekly from Ottawa to London Heathrow Airport as of March 2026. The most popular departure day for this route is Wed, with 38% of flights per week taking off on this day.