Cheap flights from London Heathrow Airport to Ottawa from £251

In general, May is the cheapest month to fly from London Heathrow Airport to Ottawa. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £417. If you aren’t able to travel during the month of May, then book flights to Ottawa from London Heathrow Airport during June instead. Flights to Ottawa in June, while not as cheap as those in May, still average around £512.

The cheapest day to depart on your flight to Ottawa is on a Friday when prices can be found for as low as £522. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around £634. These prices are subject to change though, so be sure to set up a Price Alert for flights to Ottawa.

Flying to Ottawa from London Heathrow Airport in the morning is the least expensive time of day to depart. momondo users have found prices as low as £551 when looking at flights departing in the morning. At midday is when there is more demand to fly to Ottawa, so prices are often more expensive at around £627 per ticket.

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

You are more likely to see cheaper flights to Ottawa from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Ottawa for around £560 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ottawa from London Heathrow Airport for as low as £459 on momondo.

There are 3 cabin classes available to choose from on London Heathrow Airport to Ottawa 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 30% on your flight if you consider stops on a London Heathrow Airport to Ottawa flight.

As of June 2026, prices for London Heathrow Airport to Ottawa flights are approximately 16% cheaper when compared to flights at the same time last year.

Virgin Atlantic and KLM are the most popular carriers operating from London Heathrow to Ottawa

Air Canada, Lufthansa and British Airways are the top three most popular airlines that fly to Ottawa from London Heathrow Airport according to our data. Air Canada is the first choice among our users, with 79% of people opting to fly with this airline when travelling to Ottawa. Keep in mind that there are 7 different airlines that fly to Ottawa on a routine basis, so you have a few additional options to choose from.

Historically, on average around 10% of flights between London and Ottawa have experienced a delay on any given week. The average delay length over the past 12 months has been 242 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Saturday 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 10% of their flights experiencing any sort of delay.

Paris (CDG) was the most common stop: 73% of momondo users choosing one-stop flights on this route connected there.

Flights via Toronto (YYZ) offer the lowest average return price of £429.

Flights connecting via Toronto (YYZ) have the shortest average one-way travel time: 11h 08m.

Paris (CDG) has the shortest average stopover time for this route: 1h 38m.

As of June 2026, there are 2 flights per day flying from London Heathrow Airport to Ottawa. The most common time of day flights depart is 14:00, with 100% of flights taking off in the afternoon.

20 flights are operational weekly from London Heathrow Airport to Ottawa as of June 2026. The most popular departure day for this route is Wed, with 35% of flights per week taking off on this day.