Cheap flights from Ottawa to the United Kingdom from C$ 339

If you aren’t able to travel during the month of January, then book flights to United Kingdom from Ottawa during July instead. Flights to United Kingdom in July, while not as cheap as those in January, still average around C$ 511.

According to our data, Tuesday is the cheapest day to fly to United Kingdom from Ottawa. The lowest ticket price found for a Tuesday departure recently was C$ 1,024. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Ottawa to United Kingdom on a Thursday will generally be more expensive and average around C$ 1,232. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

In the evening is the cheapest time of day to fly from Ottawa to United Kingdom when you can find flight prices for as low as C$ 1,136. Flying to United Kingdom in the evening is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to United Kingdom is in the afternoon when prices are around C$ 1,223.

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

You are more likely to see cheaper flights to United Kingdom from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around C$ 1,143 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from Ottawa for as low as C$ 1,042 on momondo.

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

WestJet, Air Transat, and Lufthansa are the most popular carriers operating from Ottawa to United Kingdom

Air Canada, British Airways and Air Transat are the top three most popular airlines that fly to United Kingdom from Ottawa according to our data. Air Canada is the first choice among our users, with 58% of people opting to fly with this airline when travelling to United Kingdom. Keep in mind that there are 11 different airlines that fly to United Kingdom on a routine basis, so you have a few additional options to choose from.

Historically, on average around 27% of flights between Ottawa and United Kingdom have experienced a delay on any given week. The average delay length over the past 12 months has been 143 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. Sunday 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 27% of their flights experiencing any sort of delay.

The number of flights available between Ottawa and United Kingdom is 4 per day as of June 2026. The most frequent departure time is 9:00p.m., with 100% of daily flights leaving in the evening.

29 flights are operational weekly from Ottawa to United Kingdom as of June 2026. The most popular departure day for this route is Mon, with 24% of flights per week taking off on this day.