Cheap flights from London Heathrow Airport to Ottawa from £214

In general, June 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 £474. If you aren’t able to travel during the month of June, then book flights to Ottawa from London Heathrow Airport during April instead. Flights to Ottawa in April, while not as cheap as those in June, still average around £487.

The cheapest day to depart on your flight to Ottawa is on a Friday when prices can be found for as low as £530. 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 Sunday because tickets tend to average around £596. 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 £559 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 £568 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 £553 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 £363 on momondo.

There are 3 cabin classes available to choose from on London Heathrow 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 26% on your flight if you consider stops on a London Heathrow Airport to Ottawa flight.

As of March 2026, prices for London Heathrow Airport to Ottawa flights are approximately 8% cheaper when compared to flights at the same time last year.

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 236 minutes.

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

Thursday 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: 57% of momondo users choosing one-stop flights on this route connected there.

Flights via Toronto (YYZ) offer the lowest average return price of £427.

Flights connecting via Montreal (YUL) have the shortest average one-way travel time: 10h 23m.

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