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Cheap Flights from Ottawa to London

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Compare Ottawa 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 to London

Looking for a cheap last-minute deal or the best return flight from Ottawa to London? Find the lowest prices on one-way and return tickets right here.
London.R 4,998 per passenger.Departing Sat, 7 Jun.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Sat, 7 Jun, arriving in London Stansted.Price includes taxes and charges.From R 4,998, select.
London.R 5,166 per passenger.Departing Tue, 8 Jul.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Tue, 8 Jul, arriving in London Stansted.Price includes taxes and charges.From R 5,166, select.
London.R 5,713 per passenger.Departing Wed, 6 Aug.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Wed, 6 Aug, arriving in London Stansted.Price includes taxes and charges.From R 5,713, select.
London.R 6,105 per passenger.Departing Sat, 31 May.One-way flight with Porter Airlines (Canada) Ltd.Outbound indirect flight with Porter Airlines (Canada) Ltd, departs from Ottawa International on Sat, 31 May, arriving in London Gatwick.Price includes taxes and charges.From R 6,105, select.
London.R 6,426 per passenger.Departing Tue, 16 Sep.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Ottawa International on Tue, 16 Sep, arriving in London Stansted.Price includes taxes and charges.From R 6,426, select.
London.R 6,455 per passenger.Departing Mon, 6 Oct.One-way flight with Porter Airlines (Canada) Ltd.Outbound indirect flight with Porter Airlines (Canada) Ltd, departs from Ottawa International on Mon, 6 Oct, arriving in London Gatwick.Price includes taxes and charges.From R 6,455, select.
London.R 7,143 per passenger.Departing Sun, 16 Nov.One-way flight with Porter Airlines (Canada) Ltd.Outbound indirect flight with Porter Airlines (Canada) Ltd, departs from Ottawa International on Sun, 16 Nov, arriving in London Gatwick.Price includes taxes and charges.From R 7,143, select.
London.R 7,792 per passenger.Departing Sat, 12 Jul.One-way flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Sat, 12 Jul, arriving in London Heathrow.Price includes taxes and charges.From R 7,792, select.

Find the cheapest month to fly from Ottawa to London

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ottawa to London flights are currently cheapest in June.
May
from R 6,105
Jun
from R 4,998
Jul
from R 5,166
Aug
from R 5,713
Sep
from R 6,426
Oct
from R 6,455
Nov
from R 7,143
Dec
from R 7,907
Jan
from R 11,493
Feb
from R 8,914
Mar
from R 8,078
Apr
Find prices

Direct flights from Ottawa to London

Alternative Ottawa to London routes

Looking for the cheapest, fastest or easiest route from Ottawa to London? You could fly into the following airports instead.

Ottawa to London: Flight information

The things to know before you go.
Cheapest flight foundR 4,998
Cheapest month to flyJune
Average flight time6 hrs, 35 mins
Most popular airlineUnited
Average flights per week29

Finding cheap flights from Ottawa to London: Frequently asked questions

There are 6 airports in London: London City, London Heathrow, London Gatwick, London Luton, London Stansted, and London Southend.
The best price we found for a return flight from Ottawa to London is R 10,446. 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.
United, Air Canada and MEA fly direct from Ottawa to London.
As of May 2025, there are 29 flights per week flying from Ottawa to London.
The cheapest month to fly from Ottawa to London is usually May 2025.
If you're flying from Ottawa, the cheapest airport near London is London Gatwick – which is 40.3 km away from the centre of London. We've found flights into this airport from R 10,446.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Ottawa to London on Sunday, 15 June 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 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.
In May, the average temperature is usually around 12°C. August is typically the warmest month in London, when it usually averages around 22°C. You can expect the least rain in March. The coldest month is January, with temperatures averaging 1°C. The rainiest month is October.
The cheapest airline that flies to London is WestJet. And the cheapest airline that flies to London Heathrow Airport is Lufthansa.

Flying from Ottawa to London: what you need to know

  • Planning your holiday starts with working out where you'll fly out of in Ottawa. Ottawa/Macdonald-Cartier International Airport (YOW) is the city's main base, so check out your options for reserving a flight from Ottawa to London taking off from here.

  • London has a variety of airports you can fly into. Make your landing at London Heathrow Airport (LHR), London Gatwick Airport (LGW) or Stansted Airport (STN). Alternatively, touch down at London Luton Airport (LTN) or London City Airport (LCY).

  • Around 6 hours 35 minutes is how long you can expect to be in the air on a direct Ottawa to London flight.

  • Ottawa and London share the same timezone, UTC+0.

  • Allow plenty of time to make your Ottawa to London flight. As a rule of thumb, arrive at least two hours before international departures and an hour ahead for domestic flights.

  • If you're flying during a major holiday or other peak period, allow for even more time. A good rule is two hours ahead of domestic flights and up to four hours before international departures. Lines at security and check-in will be longer.

How to find the cheapest flights from Ottawa to London

  • Get cheap Ottawa to London flights by booking four months ahead. Based on our research, that's the ideal time for finding the biggest deals.

  • The best month for scoring cheap plane tickets from Ottawa to London is July. Use the 'Whole month' tool to compare flight prices, then select the dates that offer the lowest fares.

  • Finding a cheap flight from Ottawa to London is easy with Price Alerts. Simply set up one of these automatic alerts and we'll get in touch as soon as a better deal is available.

  • Tailor your flights using filters. Select your ideal departure and arrival times, airlines and total journey duration. You can also sort your results by 'Fastest,' 'Best' or 'Cheapest' Ottawa to London flights.

Flying from Ottawa

Ottawa/Macdonald-Cartier International Airport (YOW)

  • You can catch a direct flight from Ottawa to London leaving from Ottawa/Macdonald-Cartier International Airport (YOW). Start your trip at YOW and touch down at London Heathrow Airport (LHR).

  • Look out for promotions with Air Canada. This airline offers direct Ottawa to London plane tickets out of YOW.

  • YOW is around 11 kilometres from central Ottawa. If you're driving, ride-sharing or catching a cab from the centre, it'll take 20 minutes or so to get there, depending on the traffic. If you're using public transport, expect the trip time to be around 45 minutes.

  • Booked an early flight from Ottawa to London? Avoid the stress of rushing to the terminal (and sneak in some extra snooze time) by choosing one of these stays close to Ottawa/Macdonald-Cartier International Airport:

  • Of the flights that depart from Ottawa/Macdonald-Cartier International Airport, 58.21% land on schedule at their destination.

  • You'll find YOW at 50 Airport Road.

Arriving in London

London Heathrow Airport (LHR)

  • London Heathrow Airport (LHR) to central London takes about 55 minutes by car. The centre is roughly 26 kilometres away.

  • When travelling by public transport, expect a journey time of about 1 hour.

  • Consider booking a hotel close to LHR if you're coming in on a late flight from Ottawa to London. Select one of these accommodation options and avoid the hassle of a long transfer:

  • Pick up a London Heathrow Airport rental car and explore London and beyond with your own set of wheels. Surprice, U-Save and Green Motion are popular outlets to choose from here.

  • Booking your vehicle from London Heathrow Airport about one week ahead gives you the best shot at securing a great deal.

London Gatwick Airport (LGW)

  • Central London is around 40 kilometres from London Gatwick Airport (LGW). Once your flight from Ottawa to London has landed and you've made your way through the terminal, the drive should take about 1 hour 20 minutes.

  • If you travel by public transport, you'll reach the centre in 30 minutes or so.

  • Place the 'Do not disturb' sign on your door and relax at a hotel close to LGW. Here are a few options where you can settle in after your flight from Ottawa to London:

  • Green Motion, U-Save and Drivalia make collecting a London Gatwick Airport rental car simple. These suppliers are located in or around the terminal and will have you on your way in a heartbeat.

  • Secure your first choice, not your last resort. Booking your ride from LGW three weeks in advance often means more savings and a wider choice of vehicles.

Stansted Airport (STN)

  • Step off your flight from Ottawa to London and head directly to your hotel or jump right into sightseeing. The centre of London is around 48 kilometres from Stansted Airport (STN) and usually takes 1 hour to drive there.

  • The journey takes about 1 hour 25 minutes by public transport.

  • Enjoy an unhurried start to your trip by choosing a hotel near STN after your Ottawa to London flight. Unwind after a day of travel or just take a moment to settle into a new destination at:

  • Be in the driver's seat of the next part of your journey with a Stansted Airport rental car. Green Motion, Drivalia and Europcar are some companies you can book with.

  • About four weeks ahead of your flight from Ottawa to London is a good time to secure your vehicle from STN. You're more likely to find a cheaper rate or catch some early booking discounts.

Best time to go to London

  • July is the most popular month for flights from Ottawa to London. To avoid the crowds, head to London in February.

  • The warmest month in London is July, with temperatures ranging between 11ºC (52ºF) and 26ºC (79ºF). Lock in your Ottawa to London ticket then if you enjoy this type of weather.

  • If you want to travel in cooler conditions, look for a cheap flight from Ottawa to London in January when temperatures average between 0ºC (32ºF) and 9ºC (48ºF).

More about London

Explore more of United Kingdom

  • Birmingham is just one of the many cities in United Kingdom waiting to be discovered after you've experienced London. Around 161 kilometres to the north-west, popular attractions include Cadbury World, The Library of Birmingham and National Sea Life Centre.

  • Bristol is another well-known destination in United Kingdom and is around 177 kilometres west of London. No journey is complete without experiencing Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature 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.