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

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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? If you want to travel next month, return fares start from $677. Find the lowest prices on one-way and return tickets right here.

London.$677 per passenger.Departing Sun, 13 Sep, returning Tue, 22 Sep.Return flight with Air Transat.Outbound direct flight with Air Transat departs from Ottawa International on Sun, 13 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 $677, select.

London.$798 per passenger.Departing Sun, 11 Oct, returning Tue, 13 Oct.Return flight with Air Transat.Outbound indirect flight with Air Transat, departs from Ottawa International on Sun, 11 Oct, arriving in London Gatwick.Inbound indirect flight with Air Transat, departs from London Gatwick on Tue, 13 Oct, arriving in Ottawa International.Price includes taxes and charges.From $798, select.

London.$903 per passenger.Departing Mon, 5 Oct, returning Mon, 19 Oct.Return flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Mon, 5 Oct, arriving in London Heathrow.Inbound direct flight with Air Canada departs from London Heathrow on Mon, 19 Oct, arriving in Ottawa International.Price includes taxes and charges.From $903, select.

London.$907 per passenger.Departing Wed, 23 Sep, returning Thu, 1 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 Thu, 1 Oct, arriving in Ottawa International.Price includes taxes and charges.From $907, select.

London.$908 per passenger.Departing Mon, 31 Aug, returning Mon, 7 Sep.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ottawa International on Mon, 31 Aug, arriving in London Heathrow.Inbound indirect flight with Air Canada, departs from London Heathrow on Mon, 7 Sep, arriving in Ottawa International.Price includes taxes and charges.From $908, select.

London.$945 per passenger.Departing Fri, 23 Oct, returning Tue, 3 Nov.Return flight with Air France.Outbound indirect flight with Air France, departs from Ottawa International on Fri, 23 Oct, arriving in London Gatwick.Inbound indirect flight with Air France, departs from London Gatwick on Tue, 3 Nov, arriving in Ottawa International.Price includes taxes and charges.From $945, select.

London.$952 per passenger.Departing Fri, 23 Oct, returning Sun, 13 Dec.Return flight with Air France.Outbound indirect flight with Air France, departs from Ottawa International on Fri, 23 Oct, arriving in London Gatwick.Inbound indirect flight with Air France, departs from London Gatwick on Sun, 13 Dec, arriving in Ottawa International.Price includes taxes and charges.From $952, select.

London.$963 per passenger.Departing Wed, 30 Sep, returning Mon, 11 Jan.Return flight with KLM and Air France.Outbound indirect flight with KLM, departs from Ottawa International on Wed, 30 Sep, arriving in London Heathrow.Inbound indirect flight with Air France, departs from London Heathrow on Mon, 11 Jan, arriving in Ottawa International.Price includes taxes and charges.From $963, select.

London.$964 per passenger.Departing Wed, 30 Sep, returning Thu, 10 Dec.Return flight with KLM and Air France.Outbound indirect flight with KLM, departs from Ottawa International on Wed, 30 Sep, arriving in London Heathrow.Inbound indirect flight with Air France, departs from London Heathrow on Thu, 10 Dec, arriving in Ottawa International.Price includes taxes and charges.From $964, select.

London.$965 per passenger.Departing Thu, 10 Sep, returning Fri, 27 Nov.Return flight with KLM and Air France.Outbound indirect flight with KLM, departs from Ottawa International on Thu, 10 Sep, arriving in London Heathrow.Inbound indirect flight with Air France, departs from London Heathrow on Fri, 27 Nov, arriving in Ottawa International.Price includes taxes and charges.From $965, select.

London.$1,042 per passenger.Departing Sun, 23 Aug, returning Fri, 28 Aug.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ottawa International on Sun, 23 Aug, arriving in London Heathrow.Inbound indirect flight with Air Canada, departs from London Heathrow on Fri, 28 Aug, arriving in Ottawa International.Price includes taxes and charges.From $1,042, select.

London.$1,059 per passenger.Departing Thu, 1 Oct, returning Mon, 30 Nov.Return flight with Lufthansa.Outbound direct flight with Lufthansa departs from Ottawa International on Thu, 1 Oct, arriving in London Heathrow.Inbound direct flight with Lufthansa departs from London Heathrow on Mon, 30 Nov, arriving in Ottawa International.Price includes taxes and charges.From $1,059, select.

London.$1,072 per passenger.Departing Sat, 3 Oct, returning Thu, 3 Dec.Return flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Sat, 3 Oct, arriving in London Heathrow.Inbound direct flight with Air Canada departs from London Heathrow on Thu, 3 Dec, arriving in Ottawa International.Price includes taxes and charges.From $1,072, select.

London.$1,076 per passenger.Departing Wed, 26 Aug, returning Thu, 10 Sep.Return flight with Air Canada.Outbound direct flight with Air Canada departs from Ottawa International on Wed, 26 Aug, arriving in London Heathrow.Inbound direct flight with Air Canada departs from London Heathrow on Thu, 10 Sep, arriving in Ottawa International.Price includes taxes and charges.From $1,076, select.

London.$1,077 per passenger.Departing Tue, 25 Aug, returning Thu, 1 Oct.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Ottawa International on Tue, 25 Aug, arriving in London Heathrow.Inbound indirect flight with Air Canada, departs from London Heathrow on Thu, 1 Oct, arriving in Ottawa International.Price includes taxes and charges.From $1,077, select.

London.$1,082 per passenger.Departing Mon, 7 Sep, returning Sat, 28 Nov.Return flight with Lufthansa.Outbound direct flight with Lufthansa departs from Ottawa International on Mon, 7 Sep, arriving in London Heathrow.Inbound direct flight with Lufthansa departs from London Heathrow on Sat, 28 Nov, arriving in Ottawa International.Price includes taxes and charges.From $1,082, 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 September.

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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 found	$677
Cheapest month to fly	September
Average flight time	6 hrs, 57 mins
Most popular airline	TAP Air Portugal
Average flights per week	36

Finding cheap flights from Ottawa to London: Frequently asked questions

How many airports are there in London?

There are 6 airports in London: London City, London Heathrow, London Gatwick, London Luton, London Stansted, and London Southend.

How much are return flights from Ottawa to London?

The best price we found for a return flight from Ottawa to London is $677. 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.

How long does it take to fly from Ottawa to London?

6 hours and 57 minutes is the average flight time from Ottawa to London.

Which airlines fly direct from Ottawa to London?

TAP Air Portugal, Lufthansa and United fly direct from Ottawa to London.

How many flights are there a week from Ottawa to London?

As of August 2026, there are 324 flights per week flying from Ottawa to London.

When is the cheapest time to fly from Ottawa to London?

The cheapest month to fly from Ottawa to London is usually September.

Which is the cheapest airport to fly into in London?

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 $677.

Which upcoming date is cheapest to fly from Ottawa to London on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Ottawa to London on Sunday, 13 September 2026.

Can I get a direct flight from Ottawa to London?

Yes – the average flight time is 6 hours and 57 minutes.

How can I get the best flight deal from Ottawa to London?

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.

When is the best time to book flights to London?

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.

What’s the weather like in London?

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.

Which is the cheapest airline to fly from Ottawa to London with?

The cheapest airline that flies to London is Air Transat .

Flying from Ottawa to London: what you need to know

Ottawa's main base, Ottawa International Airport (YOW), is where countless awesome holidays begin. Explore the options for leaving from here when booking your flight from Ottawa to London.
Land at London Heathrow Airport (LHR), London Gatwick Airport (LGW) or London Stansted Airport (STN). You can also disembark at London Luton Airport (LTN) and London City Airport (LCY) in London.
Around 6 hours 55 minutes is how long you'll be travelling on a direct Ottawa to London flight.
London is five hours ahead of Ottawa and follows the UTC+0 timezone.
With three flights a week between the two airports, Ottawa International Airport (YOW) to London Heathrow Airport (LHR) is the most popular route. Hop on the earliest flight from Ottawa to London with Air Canada at 18:55. If you'd like to make the most of your day before you fly, the last flight from YOW to LHR is with Air Canada at 21:00.
Allow plenty of time to catch your Ottawa to London flight. As a general rule, arrive two hours before international departures and an hour ahead for domestic flights.
Flying over a peak time such as July? Major public holidays and other popular seasons can lead to longer queues at check-in and security. Play things extra safe and get there up to four hours ahead of international flights and two hours before domestic departures.

How to find the cheapest flights from Ottawa to London

At the moment, $369 is the best price we've found for a one-way ticket from Ottawa to London. The cheapest price for a return flight is $677. Remember fares can change due to demand at the time of booking.
Score cheap Ottawa to London flights by booking two months ahead. According to our research, that's the ideal time frame for bagging a bargain.
Plan your trip for July. That's the best month for landing a great bargain on plane tickets from Ottawa to London. If you're flexible on when you fly, use the 'Whole month' tool to find the lowest price across every month.
Getting a cheap flight from Ottawa to London couldn't be easier with Price Alerts. Simply create one of these automatic alerts and we'll let you know as soon as there's a better deal.
Find a cheap Ottawa to London flight with the help of our filters. Select your preferred duration, departure time and airlines, then sort the results by 'Cheapest' to see the best deals.

Flying from Ottawa

Ottawa International Airport (YOW)

Set off from Ottawa International Airport (YOW) and fly right through to London Heathrow Airport (LHR) or London Gatwick Airport (LGW). If you're looking for a direct flight from Ottawa to London out of YOW, those are your final stops.
Look out for promotions with Air Canada. This carrier offers direct Ottawa to London plane tickets from YOW.
Located around 11 kilometres from the centre of Ottawa, YOW can be reached in about 20 minutes by car (depending on traffic). The journey by public transport will take roughly 35 minutes.
Catching an early flight from Ottawa to London? Avoid the hassle of rushing to the airport (and sneak in some extra precious sleep) by choosing one of these stays near Ottawa International Airport:
Of the flights that depart from Ottawa International Airport, 65% 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) is approximately 26 kilometres from the centre of London. If you're catching a taxi or a ride-share, the drive takes roughly 45 minutes.
Getting there on public transport typically takes 25 minutes.
If you're coming in on a late flight from Ottawa to London, nothing beats the convenience of staying near the terminal. Collect your bags from the carousel and then be showered and sleeping not long after at one of these hotels near LHR:
Get your adventure underway by picking up a London Heathrow Airport rental car. Grab a set of wheels from Surprice, U-Save or Green Motion to explore London and beyond.
Lock in the lowest price by booking your ride from London Heathrow Airport around one week before your trip.

London Gatwick Airport (LGW)

The centre of London is approximately 40 kilometres from London Gatwick Airport (LGW). After your flight from Ottawa to London has hit the runway and you've made your way out of the airport, expect a drive of about 1 hour 5 minutes.
If you choose to travel on public transport, the journey will take you 45 minutes or so.
You'll find some great places ready to welcome you near LGW. Tuck yourself in after your Ottawa to London flight at any of these perfectly located options:
Green Motion, U-Save and Drivalia make collecting a London Gatwick Airport rental car simple. These trusted companies are located around or in the terminal and will have you behind the wheel before you know it.
Snap up the best price by booking your ride from LGW three weeks in advance. You can also expect to have a wider selection of vehicles.

London Stansted Airport (STN)

Hop off your flight from Ottawa to London and head directly to your hotel or start exploring right away. The centre of London is around 48 kilometres from London Stansted Airport (STN) and takes roughly 1 hour 5 minutes to reach driving.
Public transport can get you there in about 45 minutes.
Enjoy a restful, unhurried start to your break by choosing a hotel near STN after your Ottawa to London flight. Recharge after a day of travel or just take a moment to find your footing in a new place at:
Take control of the next part of your journey by picking up a London Stansted Airport rental car. Green Motion, Drivalia and Europcar make getting on the road effortless.
If you're searching for a specific model or make, lock in your ride from STN about four weeks before your flight from Ottawa to London. This gives you a better shot at getting the car you want, as well as a better price.

Best time to go to London

March is the quietest month for flights from Ottawa to London, while July is the busiest. Choose the ideal time to go to London based on whether you want a lively atmosphere or a more laid-back vibe.
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 this is the type of weather you enjoy.
If you like 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

When it comes to looking for somewhere to rest your head, you'll find the best stays in London right here. Explore these options as soon as you've locked in your flight from Ottawa to London:
There are so many things to explore in this city it can be hard to figure out where to begin. The British Museum, Westminster Abbey and Big Ben are top sights which should be on any good London itinerary.

Explore more of the United Kingdom

You've visited London, now it's time to explore other corners of the United Kingdom. Travel about 257 kilometres northwest to Manchester to tick off its leading sights. From Manchester United Museum & Stadium Tour to The Homes of Football and Science and Industry Museum, your itinerary will be busy.
Around 161 kilometres northwest of London, Birmingham is another essential stop in the United Kingdom. Get a taste of what this destination has to offer at Birmingham Museum & Art Gallery, Birmingham Hippodrome and Bournville Experience.