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Cheap Flights from Ottawa (YOW) to London (LOND)

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      Travellers and cabin class, 1 Adult, Economy
      TAP Air Portugal
      Lufthansa
      United
      Austrian Airlines
      Aegean Airlines
      Air Canada

      Compare Ottawa International to London flight deals

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

      Book the best London fare with no extra fees

      Flight deals from Ottawa International to London

      Looking for a cheap last-minute deal or the best return flight from Ottawa International Airport to London? If you want to travel next month, return fares start from $645. Find the lowest prices on one-way and return tickets right here.
      London.$645 per passenger.Departing Tue, 15 Sep, returning Tue, 22 Sep.Return flight with Air Transat.Outbound direct flight with Air Transat departs from Ottawa International on Tue, 15 Sep, arriving in London Gatwick.Inbound direct flight with Air Transat departs from London Gatwick on Tue, 22 Sep, arriving in Ottawa International.Price includes taxes and charges.From $645, select.
      London.$674 per passenger.Departing Sat, 3 Oct, returning Sat, 10 Oct.Return flight with Air Transat.Outbound indirect flight with Air Transat, departs from Ottawa International on Sat, 3 Oct, arriving in London Gatwick.Inbound indirect flight with Air Transat, departs from London Gatwick on Sat, 10 Oct, arriving in Ottawa International.Price includes taxes and charges.From $674, select.
      London.$774 per passenger.Departing Fri, 9 Oct, returning Fri, 16 Oct.Return flight with Air Transat.Outbound direct flight with Air Transat departs from Ottawa International on Fri, 9 Oct, arriving in London Gatwick.Inbound direct flight with Air Transat departs from London Gatwick on Fri, 16 Oct, arriving in Ottawa International.Price includes taxes and charges.From $774, select.
      London.$898 per passenger.Departing Wed, 23 Sep, returning Wed, 14 Oct.Return flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Wed, 23 Sep, arriving in London Heathrow.Inbound direct flight with Air Canada departs from London Heathrow on Wed, 14 Oct, arriving in Ottawa International.Price includes taxes and charges.From $898, select.
      London.$934 per passenger.Departing Tue, 20 Oct, returning Tue, 3 Nov.Return flight with Virgin Atlantic.Outbound indirect flight with Virgin Atlantic, departs from Ottawa International on Tue, 20 Oct, arriving in London Gatwick.Inbound indirect flight with Virgin Atlantic, departs from London Gatwick on Tue, 3 Nov, arriving in Ottawa International.Price includes taxes and charges.From $934, select.
      London.$934 per passenger.Departing Thu, 5 Nov, returning Wed, 11 Nov.Return flight with Virgin Atlantic.Outbound indirect flight with Virgin Atlantic, departs from Ottawa International on Thu, 5 Nov, arriving in London Gatwick.Inbound indirect flight with Virgin Atlantic, departs from London Gatwick on Wed, 11 Nov, arriving in Ottawa International.Price includes taxes and charges.From $934, select.
      London.$936 per passenger.Departing Fri, 4 Dec, returning Fri, 11 Dec.Return flight with Virgin Atlantic.Outbound indirect flight with Virgin Atlantic, departs from Ottawa International on Fri, 4 Dec, arriving in London Gatwick.Inbound indirect flight with Virgin Atlantic, departs from London Gatwick on Fri, 11 Dec, arriving in Ottawa International.Price includes taxes and charges.From $936, select.
      London.$947 per passenger.Departing Sat, 13 Feb, returning Mon, 22 Feb.Return flight with Virgin Atlantic.Outbound indirect flight with Virgin Atlantic, departs from Ottawa International on Sat, 13 Feb, arriving in London Heathrow.Inbound indirect flight with Virgin Atlantic, departs from London Heathrow on Mon, 22 Feb, arriving in Ottawa International.Price includes taxes and charges.From $947, select.
      London.$962 per passenger.Departing Thu, 7 Jan, returning Thu, 14 Jan.Return flight with Virgin Atlantic.Outbound indirect flight with Virgin Atlantic, departs from Ottawa International on Thu, 7 Jan, arriving in London Heathrow.Inbound indirect flight with Virgin Atlantic, departs from London Heathrow on Thu, 14 Jan, arriving in Ottawa International.Price includes taxes and charges.From $962, select.
      London.$973 per passenger.Departing Mon, 28 Sep, returning Mon, 2 Nov.Return flight with Virgin Atlantic.Outbound indirect flight with Virgin Atlantic, departs from Ottawa International on Mon, 28 Sep, arriving in London Gatwick.Inbound indirect flight with Virgin Atlantic, departs from London Gatwick on Mon, 2 Nov, arriving in Ottawa International.Price includes taxes and charges.From $973, select.
      London.$992 per passenger.Departing Sun, 6 Dec, returning Sun, 24 Jan.Return flight with Air France.Outbound indirect flight with Air France, departs from Ottawa International on Sun, 6 Dec, arriving in London Gatwick.Inbound indirect flight with Air France, departs from London Gatwick on Sun, 24 Jan, arriving in Ottawa International.Price includes taxes and charges.From $992, select.
      London.$992 per passenger.Departing Wed, 25 Nov, returning Fri, 4 Dec.Return flight with Air France.Outbound indirect flight with Air France, departs from Ottawa International on Wed, 25 Nov, arriving in London Heathrow.Inbound indirect flight with Air France, departs from London Heathrow on Fri, 4 Dec, arriving in Ottawa International.Price includes taxes and charges.From $992, select.
      London.$992 per passenger.Departing Wed, 25 Nov, returning Wed, 27 Jan.Return flight with Air France.Outbound indirect flight with Air France, departs from Ottawa International on Wed, 25 Nov, arriving in London Gatwick.Inbound indirect flight with Air France, departs from London Gatwick on Wed, 27 Jan, arriving in Ottawa International.Price includes taxes and charges.From $992, select.
      London.$993 per passenger.Departing Tue, 6 Oct, returning Wed, 2 Dec.Return flight with Air France.Outbound indirect flight with Air France, departs from Ottawa International on Tue, 6 Oct, arriving in London Gatwick.Inbound indirect flight with Air France, departs from London Gatwick on Wed, 2 Dec, arriving in Ottawa International.Price includes taxes and charges.From $993, select.
      London.$1,000 per passenger.Departing Mon, 11 Jan, returning Tue, 16 Feb.Return flight with Air France.Outbound indirect flight with Air France, departs from Ottawa International on Mon, 11 Jan, arriving in London Gatwick.Inbound indirect flight with Air France, departs from London Gatwick on Tue, 16 Feb, arriving in Ottawa International.Price includes taxes and charges.From $1,000, select.
      London.$1,001 per passenger.Departing Mon, 22 Feb, returning Mon, 8 Mar.Return flight with Air France.Outbound indirect flight with Air France, departs from Ottawa International on Mon, 22 Feb, arriving in London Gatwick.Inbound indirect flight with Air France, departs from London Gatwick on Mon, 8 Mar, arriving in Ottawa International.Price includes taxes and charges.From $1,001, 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 September.
      Aug
      from $1,358
      Sep
      from $645
      Oct
      from $674
      Nov
      from $934
      Dec
      from $936
      Jan
      from $962
      Feb
      from $947
      Mar
      from $1,002
      Apr
      from $1,005
      May
      from $1,242
      Jun
      from $1,274
      Jul
      from $1,395

      Direct flights from Ottawa International to London

      Aegean Airlines
      Air Canada
      Air Transat
      Austrian Airlines
      Croatia Airlines
      Lufthansa
      MEA
      Porter Airlines
      SriLankan Airlines
      TAP Air Portugal
      United

      Alternative Ottawa International to London routes

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

      London City

      12km from central London
      Closest
      from $1,072
      Search flights

      London Heathrow

      23km from central London
      from $864
      Search flights

      London Gatwick

      40km from central London
      Cheapest
      from $645
      Search flights

      London Luton

      45km from central London
      from $976
      Search flights

      London Stansted

      49km from central London
      from $889
      Search flights

      London Southend

      57km from central London
      from $1,584
      Search flights

      Ottawa to London: Flight information

      The things to know before you go.
      Cheapest flight found$645
      Cheapest month to flySeptember
      Average flight time6 hrs, 57 mins
      Most popular airlineTAP Air Portugal
      Average flights per week70

      Finding cheap flights from Ottawa International 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 International to London is $645. 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 57 minutes is the average flight time from Ottawa International to London.
      TAP Air Portugal, Lufthansa and United fly direct from Ottawa International to London.
      As of August 2026, there are 70 flights per week flying from Ottawa International to London.
      The cheapest month to fly from Ottawa International to London is usually September.
      If you're flying from Ottawa International Airport, 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 $645.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ottawa International Airport to London on Tuesday, 15 September 2026.
      Yes – the average flight time is 6 hours and 57 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 August, the average temperature is usually around 17°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.
      Currently, Air Transat offers the cheapest flight tickets to London.

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

      • The average length of a direct flight from Ottawa/Macdonald-Cartier International Airport to London is 7 hours 30 minutes.

      • Ottawa/Macdonald-Cartier International Airport is located in Ottawa. Following the UTC+0 timezone, London is four hours ahead of Ottawa.

      • The busiest route is from Ottawa/Macdonald-Cartier International Airport (YOW) to London Heathrow Airport (LHR). Choose from two weekly services between these two airports. If you want to get on your way as soon as you can, the earliest flight from YOW to LHR is the 18:55 Air Canada option. If you'd rather fly out later on, the last departure is at 21:00 with Air Canada.

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

      • Be prepared for longer queues during popular months such as August. Arriving up to four hours ahead of international flights and two hours for domestic departures will give you plenty of time for security and boarding.

      • Direct Ottawa/Macdonald-Cartier International Airport to London tickets are available for booking. London Heathrow Airport (LHR) is where you'll be landing.

      • Air Canada is a popular airline that operates direct flights from Ottawa/Macdonald-Cartier International Airport to London.

      • The journey from central Ottawa to YOW takes about 45 minutes by public transport. If you ride-share, drive or grab a cab, you'll cover the 11 kilometres in 20 minutes or so, depending on traffic.

      • Catching an early flight from Ottawa/Macdonald-Cartier International Airport to London? Avoid the last-minute rush to the terminal (and sneak in some extra precious sleep) by choosing one of these stays close to YOW:

      • When it comes to the on-time performance of Ottawa/Macdonald-Cartier International Airport, 58.21% of flights arrive within the scheduled time frame.

      • YOW's address is 50 Airport Road.

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

      • $353 is the lowest price we've seen for a one-way Ottawa/Macdonald-Cartier International Airport to London flight. A round-trip plane ticket right now is $645. Depending on the availability and when you book, these fares could change.

      • Lock in cheap flights from YOW to London by booking three months ahead. According to our research, that's the sweet spot for landing a bargain.

      • The best month for finding cheap Ottawa/Macdonald-Cartier International Airport to London tickets is July. Use the 'Whole month' tool to compare prices, then select the dates with the lowest fares.

      • You don't need to keep looking every day to see if fares have dropped when you set up a Price Alert. We'll let you know as soon as there's an even better deal on cheap flights from YOW to London.

      • Select your preferred arrival and departure times, number of stops and airlines with our filters. Then, sort the results for your flight from Ottawa/Macdonald-Cartier International Airport to London by 'Fastest,' 'Best' or 'Cheapest.'

      Airports in London

      London Heathrow Airport (LHR)

      • London Heathrow Airport (LHR) is around 31 kilometres from central London. If you're getting a cab or a ride-share, the drive will take roughly 55 minutes.

      • It takes around 1 hour if you're using public transport.

      • Look into staying at a hotel close to LHR if you're coming in on a late flight from Ottawa/Macdonald-Cartier International Airport to London. Check in to one of these options and make your first night all about catching up on rest:

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

      • Lock in the lowest price by reserving your vehicle from London Heathrow Airport around one week before your flight from YOW to London.

      London Gatwick Airport (LGW)

      • After your flight from Ottawa/Macdonald-Cartier International Airport to London has landed, you can get to the city centre in about 1 hour 20 minutes by car. Central London is roughly 80 kilometres from London Gatwick Airport (LGW).

      • If you're catching public transport, it'll take about 30 minutes.

      • After stepping off your YOW to London flight, rest your head at a hotel near LGW. These are some great options that'll help you slip into relaxation mode:

      • Green Motion, U-Save and Drivalia make picking up a London Gatwick Airport rental car easy and quick. These providers are located in or around the terminal and will get you on your way in no time.

      • Get what you want, not just what's left over. Booking your ride from LGW three weeks in advance often means better prices and a wider selection of vehicles.

      Stansted Airport (STN)

      • Set your sights on the city centre after your flight from Ottawa/Macdonald-Cartier International Airport to London has landed. Central London is about 64 kilometres from Stansted Airport (STN) and takes roughly 1 hour to reach by taxi or ride-share.

      • Public transport will take you there in around 1 hour 25 minutes.

      • If you don't want to make your way into the centre, find a hotel near STN. Settle in at one of these stays after your YOW to London flight:

      • Whether you're searching for a mini for a solo getaway or an SUV to fit a group of friends, you'll find the right Stansted Airport rental car for you. Check out the range of wheels available from companies such as Green Motion, Drivalia and Europcar.

      • About four weeks ahead of your flight from Ottawa/Macdonald-Cartier International Airport to London is a good time to book your ride from STN. You're more likely to land a better deal or even pick up some early bird discounts.

      Best time to go to London

      • Before you book your flights from Ottawa/Macdonald-Cartier International Airport to London, consider which time of year works best for you. Peak season in London offers a lively atmosphere and plenty of activities, while low season means you'll get cheaper hotel rates and fewer crowds.

      • The warmest month in London is July, with temperatures ranging between 11ºC (52ºF) and 26ºC (79ºF). Lock in your Ottawa/Macdonald-Cartier International Airport to London flight ticket then if that's your definition of good weather.

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

      More about London

      • Start your London trip off on the right foot by choosing the perfect place to stay. After booking your flight from Ottawa/Macdonald-Cartier International Airport to London, check out our range of hotels including:

      • The British Museum and Big Ben are just two of the top-rated attractions to put on your London to-do list. Keep the sightseeing going at Buckingham Palace.

      Explore more of United Kingdom

      • London has plenty going for it, but there are so many other corners of United Kingdom waiting to be discovered. About 161 kilometres north-west of London, a visit to Birmingham will fill your itinerary to the brim. Start with attractions like Cadbury World, The Library of Birmingham and National Sea Life Centre.

      • If there's time to check out another corner of United Kingdom, head for Bristol, roughly 177 kilometres west of London. Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature Park are key highlights.

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      Plan the rest of your trip from Ottawa to London

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.