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Cheap Flights from Ottawa to London

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Compare Ottawa to London Heathrow flight deals

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

Book the best London Heathrow fare with no extra fees

Flight deals from Ottawa to London Heathrow

Looking for a cheap last-minute deal or the best return flight from Ottawa to London Heathrow? Find the lowest prices on one-way and return tickets right here.
London.$971 per passenger.Departing Thu, 27 Mar, returning Mon, 31 Mar.Return flight with Air France.Outbound indirect flight with Air France, departs from Ottawa International on Thu, 27 Mar, arriving in London Heathrow.Inbound indirect flight with Air France, departs from London Heathrow on Mon, 31 Mar, arriving in Ottawa International.Price includes taxes and charges.From $971, select.
London.$1,013 per passenger.Departing Tue, 25 Mar, returning Tue, 1 Apr.Return flight with Air France and KLM.Outbound indirect flight with Air France, departs from Ottawa International on Tue, 25 Mar, arriving in London Heathrow.Inbound indirect flight with KLM, departs from London Heathrow on Tue, 1 Apr, arriving in Ottawa International.Price includes taxes and charges.From $1,013, select.
London.$1,077 per passenger.Departing Sun, 6 Apr, returning Wed, 16 Apr.Return flight with Virgin Atlantic and KLM.Outbound indirect flight with Virgin Atlantic, departs from Ottawa International on Sun, 6 Apr, arriving in London Heathrow.Inbound indirect flight with KLM, departs from London Heathrow on Wed, 16 Apr, arriving in Ottawa International.Price includes taxes and charges.From $1,077, select.
London.$1,128 per passenger.Departing Sat, 23 Aug, returning Mon, 1 Sep.Return flight with Lufthansa.Outbound direct flight with Lufthansa departs from Ottawa International on Sat, 23 Aug, arriving in London Heathrow.Inbound direct flight with Lufthansa departs from London Heathrow on Mon, 1 Sep, arriving in Ottawa International.Price includes taxes and charges.From $1,128, select.
London.$1,128 per passenger.Departing Thu, 1 May, returning Thu, 15 May.Return flight with Lufthansa.Outbound direct flight with Lufthansa departs from Ottawa International on Thu, 1 May, arriving in London Heathrow.Inbound direct flight with Lufthansa departs from London Heathrow on Thu, 15 May, arriving in Ottawa International.Price includes taxes and charges.From $1,128, select.
London.$1,128 per passenger.Departing Sun, 16 Mar, returning Sat, 31 May.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ottawa International on Sun, 16 Mar, arriving in London Heathrow.Inbound indirect flight with Air Canada, departs from London Heathrow on Sat, 31 May, arriving in Ottawa International.Price includes taxes and charges.From $1,128, select.
London.$1,128 per passenger.Departing Mon, 18 Aug, returning Thu, 28 Aug.Return flight with Lufthansa.Outbound direct flight with Lufthansa departs from Ottawa International on Mon, 18 Aug, arriving in London Heathrow.Inbound direct flight with Lufthansa departs from London Heathrow on Thu, 28 Aug, arriving in Ottawa International.Price includes taxes and charges.From $1,128, select.
London.$1,128 per passenger.Departing Thu, 25 Sep, returning Thu, 2 Oct.Return flight with Lufthansa.Outbound direct flight with Lufthansa departs from Ottawa International on Thu, 25 Sep, arriving in London Heathrow.Inbound direct flight with Lufthansa departs from London Heathrow on Thu, 2 Oct, arriving in Ottawa International.Price includes taxes and charges.From $1,128, select.

Find the cheapest month to fly from Ottawa to London Heathrow

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ottawa to London Heathrow flights are currently cheapest in March.
Feb
Find prices
Mar
from $971
Apr
from $1,077
May
from $1,128
Jun
from $1,128
Jul
from $1,128
Aug
from $1,128
Sep
from $1,128
Oct
from $1,134
Nov
from $1,254
Dec
from $1,415
Jan
Find prices

Direct flights from Ottawa to London Heathrow

Ottawa to London Heathrow: Alternative routes

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

Ottawa to London: Flight information

The things to know before you go.
Cheapest flight found$971
Cheapest month to flyMarch
Average flight time6 hrs, 35 mins
Most popular airlineAegean Airlines
Average flights per week32

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

The best price we found for a return flight from Ottawa to London Heathrow is $971. 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.
6 hours and 35 minutes is the average flight time from Ottawa to London Heathrow.
Aegean Airlines, TAP Air Portugal and Air Canada fly direct from Ottawa to London Heathrow.
As of February 2025, there are 32 flights per week flying from Ottawa to London Heathrow.
The cheapest month to fly from Ottawa to London Heathrow is usually February 2025.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Ottawa to London Heathrow Airport on Thursday, 27 March 2025.
Yes – the average flight time is 6 hours and 35 minutes.
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 Heathrow 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.

Travelling from Ottawa to London Heathrow Airport (LHR): what you need to know

  • Ottawa/Macdonald-Cartier International Airport (YOW) is Ottawa's main airport. Explore your options for reserving a flight from Ottawa to London Heathrow Airport (LHR) departing from here.

  • London is 4 hours ahead of Ottawa. London Heathrow Airport is located in London, which operates on the UTC+0 timezone.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are tried-and-true travel tips. Be at the airport with enough time to board your flight from Ottawa to LHR.

  • Travelling during a peak month like August? School holidays and other popular seasons can lead to longer lines and delays at check-in and security. Play things extra safe and arrive up to four hours before an international flight and two hours before domestic departures.

Airports in Ottawa

Ottawa/Macdonald-Cartier International Airport (YOW)

  • YOW is about 13 kilometres from central Ottawa. To help work out how to get there, use Google Maps. This handy travel app will show you the best route and your public transport options.

  • Want a leisurely start to your holiday? Stay near Ottawa/Macdonald-Cartier International Airport. Whether you're boarding an early flight from Ottawa to London Heathrow Airport or want to avoid feeling rushed, these hotels are perfect:

About London Heathrow Airport (LHR)

Getting from London Heathrow Airport (LHR) to central London

  • From London Heathrow Airport, London is approximately 31 kilometres away. It takes around 57 minutes to get to the centre driving.

  • Travelling on public transport will take you around 1 hour and 1 minute.

How to find the cheapest flights from Ottawa to London Heathrow Airport (LHR)

  • Book a one-way ticket from Ottawa to London Heathrow Airport from $578 or travel return from just $971. The prices shown are based on availability and could change when you book.

  • We recommend booking as early as possible to lock in flight tickets from Ottawa to LHR. You're more likely to snag a great deal and have a larger selection of flight times and travel dates.

  • Getting flight tickets from Ottawa to London Heathrow Airport is easier if you're flexible with your travel plans. Use the 'Whole month' search tool to see the lowest prices throughout the month and land a great deal.

  • Create a Price Alert for flight tickets from Ottawa to LHR. You don't need to search every day to see whether prices have dropped. We'll update you the moment there's a change in price.

  • Customise your trip by applying filters. Choose the duration, number of stops, and arrival and departure times to find the ideal flight from Ottawa to London Heathrow Airport. You can also sort the results to see the 'Cheapest,' 'Best' or 'Fastest' options first.

The best time to fly from Ottawa to London Heathrow Airport (LHR)

  • July is the most popular month for flights from Ottawa to London Heathrow Airport. To escape the crowds, travel to London in February when things are quieter.

  • Before locking in your flight from Ottawa to LHR, think about the type of weather you enjoy. July is the warmest month in London, with the temperature ranging from 11ºC to 26ºC.

  • If you want cooler conditions, search for a cheap flight from Ottawa to London Heathrow Airport in January when temperatures average between 0ºC and 9ºC.

More about London

Complete your London trip with a car rental

  • We use the same magic that helped you find your cheap flight from Ottawa to London Heathrow Airport to track down your ideal ride. Check out our car rentals in London and compare offers in one place. Plus you'll find all the info you need to know, from the most popular rental company to the best time to book.

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.