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Cheap flight tickets from Ottawa to London Heathrow

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 Airport? If you want to travel next month, return fares start from RM2,914. Find the lowest prices on one-way and return tickets right here.
London.RM1,293 per passenger.Departing Sun, 5 Jul.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Sun, 5 Jul, arriving in London Heathrow.Price includes taxes and charges.From RM1,293, select.
London.RM1,311 per passenger.Departing Tue, 2 Jun.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Tue, 2 Jun, arriving in London Heathrow.Price includes taxes and charges.From RM1,311, select.
London.RM1,386 per passenger.Departing Tue, 4 Aug.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Tue, 4 Aug, arriving in London Heathrow.Price includes taxes and charges.From RM1,386, select.
London.RM1,431 per passenger.Departing Thu, 23 Jul.One-way flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Thu, 23 Jul, arriving in London Heathrow.Price includes taxes and charges.From RM1,431, select.
London.RM1,773 per passenger.Departing Mon, 19 Oct.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Mon, 19 Oct, arriving in London Heathrow.Price includes taxes and charges.From RM1,773, select.
London.RM1,896 per passenger.Departing Thu, 24 Sep.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Thu, 24 Sep, arriving in London Heathrow.Price includes taxes and charges.From RM1,896, select.
London.RM2,067 per passenger.Departing Mon, 16 Nov.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Mon, 16 Nov, arriving in London Heathrow.Price includes taxes and charges.From RM2,067, select.
London.RM2,188 per passenger.Departing Fri, 25 Dec.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Fri, 25 Dec, arriving in London Heathrow.Price includes taxes and charges.From RM2,188, select.
London.RM2,211 per passenger.Departing Wed, 6 Jan.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Wed, 6 Jan, arriving in London Heathrow.Price includes taxes and charges.From RM2,211, select.
London.RM2,212 per passenger.Departing Wed, 10 Mar.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Wed, 10 Mar, arriving in London Heathrow.Price includes taxes and charges.From RM2,212, select.
London.RM2,226 per passenger.Departing Wed, 3 Feb.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Wed, 3 Feb, arriving in London Heathrow.Price includes taxes and charges.From RM2,226, select.
London.RM2,734 per passenger.Departing Mon, 2 Nov.One-way flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Mon, 2 Nov, arriving in London Heathrow.Price includes taxes and charges.From RM2,734, select.
London.RM2,736 per passenger.Departing Mon, 5 Oct.One-way flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Mon, 5 Oct, arriving in London Heathrow.Price includes taxes and charges.From RM2,736, select.
London.RM2,737 per passenger.Departing Wed, 10 Mar.One-way flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Wed, 10 Mar, arriving in London Heathrow.Price includes taxes and charges.From RM2,737, select.
London.RM2,747 per passenger.Departing Wed, 3 Feb.One-way flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Wed, 3 Feb, arriving in London Heathrow.Price includes taxes and charges.From RM2,747, select.
London.RM2,807 per passenger.Departing Wed, 6 Jan.One-way flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Wed, 6 Jan, arriving in London Heathrow.Price includes taxes and charges.From RM2,807, 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 July.
Jun
from RM1,311
Jul
from RM1,293
Aug
from RM1,386
Sep
from RM1,896
Oct
from RM1,773
Nov
from RM2,067
Dec
from RM2,188
Jan
from RM2,211
Feb
from RM2,226
Mar
from RM2,212
Apr
Find prices
May
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.

London City

12km from central London
Closest
from RM1,628
Search flights

London Heathrow

23km from central London
from RM1,293
Search flights

London Gatwick

40km from central London
from RM993
Search flights

London Luton

45km from central London
from RM997
Search flights

London Stansted

49km from central London
Cheapest
from RM866
Search flights

London Southend

57km from central London
from RM1,256
Search flights

Ottawa to London: Flight information

The things to know before you go.
Cheapest flight foundRM1,293
Cheapest month to flyJuly
Average flight time6 hrs, 39 mins
Most popular airlineTAP Air Portugal
Average flights per week60

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 RM2,405. 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 39 minutes is the average flight time from Ottawa to London Heathrow.
TAP Air Portugal, Lufthansa and United fly direct from Ottawa to London Heathrow.
As of June 2026, there are 60 flights per week flying from Ottawa to London Heathrow.
The cheapest month to fly from Ottawa to London Heathrow is usually September.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Ottawa to London Heathrow Airport on Tuesday, 1 September 2026.
Yes – the average flight time is 6 hours and 39 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.
The cheapest airline that flies to London Heathrow is Air Canada .

Flying from Ottawa to London Heathrow Airport (LHR): What you need to know

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

  • Take a direct Ottawa to London Heathrow Airport flight and you'll be in the air for around 6 hours 30 minutes.

  • The timezone in London is UTC+0, which is five hours ahead of Ottawa. London Heathrow Airport is located in London.

  • Ottawa Macdonald-Cartier International Airport (YOW) to London Heathrow Airport (LHR) is the most popular route, with 3 direct services every week. Get from YOW to LHR on Air Canada's 6:55pm flight.

  • Get to the airport on time so you don't miss your flight from Ottawa to LHR. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid any last-minute rush.

  • Show up at the airport even earlier during popular months like August. Aim for two hours before a domestic departure and as much as four hours for international journeys. After checking in, you can use any extra time to relax or find something to eat.

Airports in Ottawa

Ottawa Macdonald-Cartier International Airport (YOW)

  • Get to your destination in one go from Ottawa Macdonald-Cartier International Airport (YOW). Direct flights from Ottawa to London Heathrow Airport (LHR) can be booked from here.

  • Book your direct flight from Ottawa to London Heathrow Airport with Air Canada. This popular airline offers services from YOW.

  • The preferred airline for passengers flying between YOW and LHR is Air Canada.

  • The journey from central Ottawa to YOW takes around 35 minutes by public transport. If you ride-share, drive or grab a taxi, you'll cover the 14 kilometres in 20 minutes or so, depending on traffic.

  • Searching for a comfortable hotel near Ottawa Macdonald-Cartier International Airport? If you've booked an early flight from Ottawa to London Heathrow Airport, these accommodation options will have you sleeping a quick hop from check-in:

  • 58% of flights taking off from Ottawa Macdonald-Cartier International Airport reach their destination on schedule.

  • YOW's address is 50 Airport Road.

About London Heathrow Airport (LHR)

Getting from London Heathrow Airport (LHR) to central London

  • London Heathrow Airport is around 24 kilometres from the centre of London. It takes around 45 minutes or so to drive to the city.

  • If you're taking public transport, expect a journey of about 25 minutes.

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

  • The lowest price we've found for a one-way ticket from Ottawa to London Heathrow Airport is RM1,293. For a return flight on this route, the best price is RM2,400. Depending on when you book and the availability, these fares could change.

  • Snap up cheap flights from Ottawa to LHR by booking two months ahead. Based on our research, that's the sweet spot for bagging a bargain.

  • July is when you're most likely to land a good deal on a Ottawa to London Heathrow Airport ticket. If you need to travel during a different time of year, the 'Whole month' tool will give you the lowest prices across every month.

  • There's no need to check every day to find out if prices have dropped when you set up a Price Alert. We'll notify you the moment a better deal is available on plane tickets from Ottawa to LHR.

  • Filters make it easier to track down a bargain for your flight from Ottawa to London Heathrow Airport. Choose the airlines, flight times and number of stops that line up with your plans. Then sort the results by 'Cheapest' to zero in on the cheapest fare fast.

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

  • Picture the kind of break you want when deciding when to fly. January is the quietest month to go to London. July is when most people book flights from Ottawa to London Heathrow Airport (LHR), which may be ideal if you're chasing more excitement.

  • Lock in a Ottawa to LHR plane ticket departing in July if you're eager to visit the city during its warmest month. Expect temperatures in London to range from 11ºC (52ºF) to 26ºC (79ºF).

  • January has temperatures of between 0ºC (32ºF) and 9ºC (48ºF). Search for cheap tickets from Ottawa to London Heathrow Airport around that time if you'd rather travel in cooler conditions.

More about London

  • Start your London trip off on the right foot by choosing the perfect place to stay. As soon as you've booked your flight from Ottawa to London Heathrow Airport, check out our range of accommodation options including:

  • Every great journey has to include some sightseeing. The British Museum, Westminster Abbey and Big Ben are attractions you won't want to skip in London.

Explore more of the United Kingdom

  • London has its own special appeal, but there are so many other corners of the United Kingdom waiting to be discovered. About 153 kilometres northwest of London, a trip to Birmingham will keep you busy. Start with leading attractions like Birmingham Museum & Art Gallery, Birmingham Hippodrome Theatre and Bournville Experience.

  • If you're looking to explore another major stop in the United Kingdom, head for Bristol, about 145 kilometres west of London. Banksey, Clifton Suspension Bridge and Bristol International Balloon Fiesta are key highlights.

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.