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Cheap Flights from London to Ottawa

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Compare London to Ottawa flight deals

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Flight deals from London to Ottawa

Looking for a cheap last-minute deal or the best return flight from London to Ottawa? Find the lowest prices on one-way and return tickets right here.
Ottawa.ج.م.‏ 15,561 per passenger.Departing Tue, 24 Jun.One-way flight with Ryanair.Outbound indirect flight with Ryanair, departs from London Gatwick on Tue, 24 Jun, arriving in Ottawa International.Price includes taxes and charges.From ج.م.‏ 15,561, select.
Ottawa.ج.م.‏ 17,675 per passenger.Departing Sat, 31 May.One-way flight with Ryanair.Outbound indirect flight with Ryanair, departs from London Stansted on Sat, 31 May, arriving in Ottawa International.Price includes taxes and charges.From ج.م.‏ 17,675, select.
Ottawa.ج.م.‏ 18,851 per passenger.Departing Sat, 2 Aug.One-way flight with Ryanair.Outbound indirect flight with Ryanair, departs from London Luton on Sat, 2 Aug, arriving in Ottawa International.Price includes taxes and charges.From ج.م.‏ 18,851, select.
Ottawa.ج.م.‏ 21,105 per passenger.Departing Tue, 15 Jul.One-way flight with easyJet.Outbound indirect flight with easyJet, departs from London Gatwick on Tue, 15 Jul, arriving in Ottawa International.Price includes taxes and charges.From ج.م.‏ 21,105, select.
Ottawa.ج.م.‏ 21,579 per passenger.Departing Thu, 4 Sep.One-way flight with Ryanair.Outbound indirect flight with Ryanair, departs from London Stansted on Thu, 4 Sep, arriving in Ottawa International.Price includes taxes and charges.From ج.م.‏ 21,579, select.
Ottawa.ج.م.‏ 24,391 per passenger.Departing Mon, 20 Oct.One-way flight with Ryanair.Outbound indirect flight with Ryanair, departs from London Stansted on Mon, 20 Oct, arriving in Ottawa International.Price includes taxes and charges.From ج.م.‏ 24,391, select.
Ottawa.ج.م.‏ 24,525 per passenger.Departing Wed, 11 Mar.One-way flight with Norse Atlantic Airways (UK).Outbound indirect flight with Norse Atlantic Airways (UK), departs from London Gatwick on Wed, 11 Mar, arriving in Ottawa International.Price includes taxes and charges.From ج.م.‏ 24,525, select.
Ottawa.ج.م.‏ 25,987 per passenger.Departing Fri, 21 Nov.One-way flight with SKY express.Outbound indirect flight with SKY express, departs from London Gatwick on Fri, 21 Nov, arriving in Ottawa International.Price includes taxes and charges.From ج.م.‏ 25,987, select.

Find the cheapest month to fly from London to Ottawa

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London to Ottawa flights are currently cheapest in June.
May
from ج.م.‏ 17,675
Jun
from ج.م.‏ 15,561
Jul
from ج.م.‏ 21,105
Aug
from ج.م.‏ 18,851
Sep
from ج.م.‏ 21,579
Oct
from ج.م.‏ 24,391
Nov
from ج.م.‏ 25,987
Dec
from ج.م.‏ 28,869
Jan
from ج.م.‏ 26,277
Feb
Find prices
Mar
from ج.م.‏ 24,525
Apr
Find prices

Direct flights from London to Ottawa

Alternative London to Ottawa routes

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

London to Ottawa: Flight information

The things to know before you go.
Cheapest flight foundج.م.‏ 15,561
Cheapest month to flyJune
Average flight time7 hrs, 25 mins
Most popular airlineUnited
Average flights per week116

Finding cheap flights from London to Ottawa: Frequently asked questions

There are 2 airports in Ottawa: Ottawa International and Ottawa Gatineau.
The best price we found for a return flight from London to Ottawa is ج.م.‏ 24,991. 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.
7 hours and 25 minutes is the average flight time from London to Ottawa.
United, Air Canada and MEA fly direct from London to Ottawa.
As of May 2025, there are 116 flights per week flying from London to Ottawa.
The cheapest month to fly from London to Ottawa is usually February.
If you're flying from London, the cheapest airport near Ottawa is Ottawa International – which is 11.2 km away from the centre of Ottawa. We've found flights into this airport from ج.م.‏ 24,991.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from London to Ottawa on Wednesday, 11 February 2026.
Yes – the average flight time is 7 hours and 25 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 Ottawa 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 Ottawa 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. July is typically the warmest month in Ottawa, when it usually averages around 25°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging -16°C. The rainiest month is June.
The cheapest airline that flies to Ottawa is Air France. And the cheapest airline that flies to Ottawa Gatineau Airport is Lufthansa.

Travelling from London to Ottawa: what you need to know

  • London has plenty of airports to head out from. Explore your departure options from London Heathrow Airport (LHR) and London Gatwick Airport (LGW) when planning your flight from London to Ottawa. Stansted Airport (STN), London Luton Airport (LTN) and London City Airport (LCY) are the city's other main bases.

  • Disembark at Ottawa/Macdonald-Cartier International Airport (YOW), the primary gateway of Ottawa.

  • Around 7 hours 30 minutes is how long you can expect to be in the air on a direct London to Ottawa flight.

  • The timezone in Ottawa is UTC-4, which is four hours behind London.

  • The busiest route for flights from London to Ottawa is London Heathrow Airport (LHR) to {"defaultCase":"Ottawa/Macdonald-Cartier International Airport","accusativeCase":"Ottawa/Macdonald-Cartier International Airport","nominativeCase":"Ottawa/Macdonald-Cartier International Airport","dativeCase":"Ottawa/Macdonald-Cartier International Airport"} (YOW). You'll find two services that connect the two airports each week.

  • To ensure you make it on your London to Ottawa flight, leave enough time to navigate the airport and find your gate. Arriving two hours before international departures and one hour before domestic flights is the general rule.

  • Travelling over a peak time such as July? Public holidays and other high seasons can mean longer queues and delays at security. Play it safe and get there up to four hours before an international flight and two hours before domestic departures.

How to find the cheapest flights from London to Ottawa

  • Get cheap London to Ottawa flights by booking six months ahead. According to our research, that's the ideal time frame for picking up a bargain.

  • Plan your trip for September. That's the best month for scoring cheap plane tickets from London to Ottawa. If your travel dates are not set in stone, use the 'Whole month' tool to find the lowest price across every month.

  • Snapping up a cheap flight from London to Ottawa is easy with Price Alerts. All you need to do is set up one of these automatic alerts and we'll let you know when there's a better deal.

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

Flying from London

London Heathrow Airport (LHR)

  • If you're searching for a direct flight from London to Ottawa, you can leave from London Heathrow Airport (LHR). Travel from LHR to Ottawa/Macdonald-Cartier International Airport (YOW) without making any stops.

  • Air Canada is a well-known carrier that offers direct London to Ottawa plane tickets leaving from LHR.

  • Stopovers are the ideal opportunity to break up your trip — and possibly even explore a different city. When searching for London to Ottawa flights departing from London Heathrow Airport, uncheck the 'Direct flights only' box to see where you can stop along the way. Popular options include:

    • Montreal-Pierre Elliott Trudeau International Airport (YUL)

    • Pearson International Airport (YYZ)

    • Halifax Stanfield International Airport (YHZ)

  • LHR is about 26 kilometres from central London. If you're driving, catching a cab or ride-sharing from the centre, it'll take you 55 minutes or so to get there, depending on traffic conditions. If you're using public transport, expect the trip time to be around 1 hour.

  • Catching an early flight from London to Ottawa? Avoid the stress of rushing to the terminal (and get some extra shut-eye) by choosing one of these hotels near London Heathrow Airport:

  • Of all flights leaving London Heathrow Airport, 68.18% arrive on time at their destination.

London Gatwick Airport (LGW)

  • Get more out of your holiday with a stopover on your London to Ottawa flight. Visit family or friends or tick another city off your list. Whatever you want to do, check out these options between London Gatwick Airport and Ottawa:

    • Quebec City Jean Lesage International Airport (YQB)

    • Montreal-Pierre Elliott Trudeau International Airport (YUL)

    • Pearson International Airport (YYZ)

  • On public transport, you can travel from central London to LGW in around 30 minutes. The terminal is roughly 40 kilometres away. Driving will take you about 1 hour 20 minutes.

  • You're off on holiday, so why not spend an additional night away? Consider kicking back in one of these hotels near London Gatwick Airport the day before your flight from London to Ottawa:

  • 69.26% of all departures from London Gatwick Airport make it to their destination as expected.

Stansted Airport (STN)

  • From central London, STN is around 48 kilometres away. It takes roughly 1 hour to get to the airport by car and 1 hour 25 minutes or so on public transport.

  • Make catching an early London to Ottawa flight one of the easiest parts of your trip. Book a room at one of these accommodation options close to Stansted Airport and get to your departure gate without rushing:

  • The on-time performance record of STN is 64.73%. To put it simply, that's how often flights that depart this airport arrive as planned.

Arriving in Ottawa

Ottawa/Macdonald-Cartier International Airport (YOW)

  • Ottawa Gatineau Airport (YND) to central Ottawa takes around 20 minutes to reach by car. The centre is roughly 16 kilometres away.

  • Getting there by public transport takes about 1 hour 40 minutes.

  • Reserve a hotel near YOW if you're coming in on a late flight from London to Ottawa. Pick one of these accommodation options and skip the long transfer:

  • Pick up an Ottawa Gatineau Airport rental car and discover parts of Ottawa that aren't on a typical itinerary. Check out the deals from Hertz.

  • Book your vehicle from Ottawa Gatineau Airport several weeks before your departure date to get the lowest price possible. If you're planning to travel during a busy period, it's a smart idea to book your London to Ottawa flight even earlier.

Ottawa/Macdonald-Cartier International Airport (YOW)

  • The centre of Ottawa is around 11 kilometres from Ottawa/Macdonald-Cartier International Airport (YOW). Once your flight from London to Ottawa has touched down and you've navigated your way to arrivals, expect a drive of around 20 minutes.

  • You can expect the journey to take roughly 45 minutes on public transport.

  • Routes Car Rentals, Alamo and Budget make collecting an Ottawa/Macdonald-Cartier International Airport rental car easy and quick. These suppliers are located around or in the terminal and will have you ready to go in a flash.

  • Avoid last-minute price surges. Booking your ride two weeks before your arrival at YOW can help you lock in a better rate.

  • Ottawa/Macdonald-Cartier International Airport is located at 50 Airport Road.

Best time to go to Ottawa

  • Before you book your flights from London to London, consider which time of year works best for you. Peak season in London offers a lively atmosphere and plenty of things to do, while the off-season means you'll get cheaper deals on hotels and smaller crowds.

  • The warmest month in Ottawa is July, with temperatures ranging between 13ºC and 27ºC. Lock in your London to Ottawa ticket then if this is the type of weather you enjoy.

  • Search for cheap flights from London to Ottawa in January if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between -19ºC and -2ºC on average.

More about Ottawa

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

  • Parliament Hill and Rideau Canal are just two of the top-rated attractions to add to your Ottawa itinerary. Keep the momentum going by heading to National Gallery of Canada.

Explore more of Canada

  • You've seen Ottawa, now it's time to discover more of Canada. Journey about 354 kilometres south-west to Toronto to tick off its top sights. From CN Tower to Royal Ontario Museum and Go Tours Canada - Distillery District, you'll have a packed itinerary ahead.

  • Montreal is another essential stop in Canada and is around 153 kilometres east of Ottawa. No trip is complete without dropping by Mount Royal Park, Montreal Botanical Garden and Saint Joseph's Oratory of Mount Royal.

Plan the rest of your trip from London to Ottawa

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