Cheap flights from London to Ottawa from C$ 344

The month of October is, on average, the cheapest month to fly to Ottawa from London, with most prices found around C$ 119. If you aren’t able to travel to Ottawa during the month of October, then flying in February is also cheap. Prices for this month can be found on momondo for an average of C$ 398.

Our data shows that Sunday is the least expensive day to fly to Ottawa. Tickets to fly out on this day can be as low as C$ 899. Flights from London to Ottawa on a Thursday will generally be more expensive and average around C$ 1,118. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Our most recent data shows that the best time of day to fly to Ottawa is in the morning. Flights from London to Ottawa during this time can be as low as C$ 998. At noon is when there is more demand to fly to Ottawa, so prices are often more expensive at around C$ 1,103 per ticket.

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

You are more likely to see cheaper flights to Ottawa from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Ottawa for around C$ 1,029 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ottawa from London for as low as C$ 727 on momondo.

There are 3 cabin classes available to choose from on London 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 7% on your flight if you consider stops on a London to Ottawa flight.

As of April 2026, prices for London to Ottawa flights are approximately 33% cheaper when compared to flights at the same time last year.

Air Transat, KLM, and Delta are the most popular carriers operating from London to Ottawa

Air Canada, Lufthansa and British Airways are the top three most popular airlines that fly to Ottawa from London according to our data. Air Canada is the first choice among our users, with 64% of people opting to fly with this airline when travelling to Ottawa. Keep in mind that there are 5 different airlines that fly to Ottawa on a routine basis, so you have a few additional options to choose from.

Historically, on average around 11% 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 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 has had the least delays on this route over the last 12 months, with about 11% of their flights experiencing any sort of delay.

Paris (CDG) was the most common stop: 60% of momondo users choosing one-stop flights on this route connected there.

Flights via Paris (CDG) offer the lowest average round-trip price of C$ 851.

Flights connecting via Paris (CDG) have the shortest average one-way travel time: 12h 02m.

Paris (CDG) has the shortest average layover time for this route: 2h 01m.

3 flights are operational daily from London to Ottawa as of April 2026. The most popular departure time for this route is 2:00p.m., with 100% of flights per day taking off in the afternoon.

The number of flights available between London and Ottawa is 26 per week as of April 2026. The most frequent departure day is Wed, with 27% of weekly flights leaving on this day.