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Cheap Flights from Ottawa International (YOW) to London (YXU)

Compare Ottawa International to London flight deals

Find the cheapest month or even day of the year to fly to London

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Flight deals from Ottawa International to London

Looking for a cheap last-minute deal or the best return flight from Ottawa International to London? Find the lowest prices on one-way and return tickets right here.
London.£305 per passenger.Departing Thu, 9 Apr, returning Thu, 16 Apr.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ottawa International on Thu, 9 Apr, arriving in London.Inbound indirect flight with Air Canada, departs from London on Thu, 16 Apr, arriving in Ottawa International.Price includes taxes and charges.From £305, select.
London.£306 per passenger.Departing Sun, 17 May, returning Fri, 22 May.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Sun, 17 May, arriving in London.Inbound indirect flight with WestJet, departs from London on Fri, 22 May, arriving in Ottawa International.Price includes taxes and charges.From £306, select.
London.£341 per passenger.Departing Mon, 21 Sep, returning Thu, 8 Oct.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ottawa International on Mon, 21 Sep, arriving in London.Inbound indirect flight with Air Canada, departs from London on Thu, 8 Oct, arriving in Ottawa International.Price includes taxes and charges.From £341, select.
London.£346 per passenger.Departing Wed, 10 Jun, returning Sun, 14 Jun.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Wed, 10 Jun, arriving in London.Inbound indirect flight with WestJet, departs from London on Sun, 14 Jun, arriving in Ottawa International.Price includes taxes and charges.From £346, select.
London.£376 per passenger.Departing Mon, 29 Jun, returning Fri, 24 Jul.Return flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Mon, 29 Jun, arriving in London.Inbound indirect flight with WestJet, departs from London on Fri, 24 Jul, arriving in Ottawa International.Price includes taxes and charges.From £376, select.
London.£394 per passenger.Departing Sat, 18 Jul, returning Sun, 19 Jul.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ottawa International on Sat, 18 Jul, arriving in London.Inbound indirect flight with Air Canada, departs from London on Sun, 19 Jul, arriving in Ottawa International.Price includes taxes and charges.From £394, select.
London.£394 per passenger.Departing Thu, 6 Aug, returning Sun, 9 Aug.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ottawa International on Thu, 6 Aug, arriving in London.Inbound indirect flight with Air Canada, departs from London on Sun, 9 Aug, arriving in Ottawa International.Price includes taxes and charges.From £394, select.
London.£420 per passenger.Departing Sat, 14 Mar, returning Thu, 19 Mar.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ottawa International on Sat, 14 Mar, arriving in London.Inbound indirect flight with Air Canada, departs from London on Thu, 19 Mar, arriving in Ottawa International.Price includes taxes and charges.From £420, select.

Find the cheapest month to fly from Ottawa International to London

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ottawa International to London flights are currently cheapest in April.
Feb
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Mar
from £420
Apr
from £305
May
from £306
Jun
from £346
Jul
from £394
Aug
from £394
Sep
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Oct
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Nov
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Dec
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Jan
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Ottawa International to London: Alternative routes

Compare routes from Ottawa International to London below. You may find an airport to fly into that's cheaper, faster, or easier than London.

London

6 miles from central London
Closest
from £305
Search flights

Kitchener / Waterloo

55 miles from central London
Cheapest
from £292
Search flights

Ottawa to London: Flight information

The things to know before you go.
Cheapest flight found£305
Cheapest month to flyApril

Finding cheap flights from Ottawa International to London: Frequently asked questions

The best price we found for a return flight from Ottawa International to London is £305. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Ottawa International to London. But we found flights with one or more stops from £305.
As of February 2026, there are no flights flying from Ottawa International to London.
The cheapest month to fly from Ottawa International to London is usually April.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ottawa International Airport to London Airport on Thursday, 9 April 2026.
No airlines currently offer direct flights between Ottawa International Airport and London Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to London but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to London is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Air Canada offers the cheapest flight tickets to London.

Flying from Ottawa/Macdonald-Cartier International Airport (YOW) to London International Airport (YXU): what you need to know

  • Ottawa and London are in the UTC-4 timezone. This means there's no time difference to adjust for.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are golden rules for stress-free travel. Be at the airport on time to catch your YOW to YXU flight.

  • You can expect longer queues during popular months such as July. Arriving up to four hours ahead of international flights and two hours for domestic departures will give you ample time for security and boarding.

How to find the cheapest flights from Ottawa/Macdonald-Cartier International Airport (YOW) to London International Airport (YXU)

  • At the moment, £166 is the cheapest price we've seen for a one-way Ottawa/Macdonald-Cartier International Airport to London International Airport flight. The best price for a return ticket is £305. Keep in mind that fares may change due to availability at the time of booking.

  • It's usually best to book early if you're hoping to get cheap tickets from YOW to YXU. That's because airlines change prices based on demand, which tends to increase closer to departure.

  • Getting cheap flights from Ottawa/Macdonald-Cartier International Airport to London International Airport is easy if you can be flexible with your travel plans. Use the 'Whole month' function to see the lowest prices across every month and score a great deal.

  • Save time looking for cheap flights from YOW to YXU by creating a Price Alert. You'll get an email or notification on the app when a special offer becomes available.

  • Choose your ideal arrival and departure times, number of stops and airlines with the filters. Alternatively, sort your results by 'Cheapest' to see the best deals on flights from Ottawa/Macdonald-Cartier International Airport to London International Airport.

Handy information about Ottawa/Macdonald-Cartier International Airport (YOW)

  • YOW is located at 50 Airport Road.

  • 58.21% of flights that depart Ottawa/Macdonald-Cartier International Airport touch down at their destination on time.

  • To get to Ottawa/Macdonald-Cartier International Airport from central Ottawa, it takes around 20 minutes if you're travelling by car. This depends on traffic, however. It's approximately 8 miles from the airport to the city centre.

  • Planning to take public transport? You can expect a journey time of around 45 minutes.

  • Get your journey off to a leisurely start by staying near YOW. Whether you're taking an early flight from Ottawa/Macdonald-Cartier International Airport to London International Airport or just don't like being rushed, these stays are perfect:

Arriving at London International Airport (YXU)

Getting from London International Airport (YXU) to central London

  • From London International Airport, London is approximately 7 miles away. It takes around 20 minutes to get to the centre driving.

  • If you're travelling by public transport, expect a journey of around 55 minutes.

When to fly to London International Airport (YXU)

  • It's time to pick your trip dates for your flight from Ottawa/Macdonald-Cartier International Airport to London International Airport. August is the busiest month to head to London. If you like a more low-key vibe, go in November.

  • Book your flight from Ottawa/Macdonald-Cartier International Airport to London International Airport for July if you want to go to London during its warmest month. You can expect temperatures of between 13ºC (55ºF) and 27ºC (81ºF).

  • If you'd rather travel in cooler conditions, look for a cheap ticket from YOW to YXU in January. Temperatures average between -13ºC (9ºF) and 2ºC (36ºF) then.

Explore more of Canada

  • You've visited London, now it's time to explore more of Canada. Travel about 100 miles north-east to Toronto to check off its top attractions. From CN Tower to Royal Ontario Museum and Go Tours Canada - Distillery District, you've got a jam-packed schedule ahead.

  • Mississauga is another sought-after destination in Canada and is around 90 miles north-east of London. No trip is complete without dropping by Credit Meadows Park, Tree Sculpture - Animal Totem by Jim Menken and Dunn Park.

Plan the rest of your trip from Ottawa to London

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.