$256 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 round-trip flight from Ottawa to London? If you want to travel next month, round-trip fares start from $523. Find the lowest prices on one-way and round-trip tickets right here.

London.$256 per passenger.Departing Sun, Mar 22.One-way flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Sun, Mar 22, arriving in London Gatwick.Price includes taxes and charges.From $256, select.

London.$273 per passenger.Departing Mon, Apr 13.One-way flight with WestJet.Outbound indirect flight with WestJet, departing from Ottawa International on Mon, Apr 13, arriving in London Stansted.Price includes taxes and charges.From $273, select.

London.$277 per passenger.Departing Sat, May 9.One-way flight with WestJet.Outbound indirect flight with WestJet, departing from Ottawa International on Sat, May 9, arriving in London Gatwick.Price includes taxes and charges.From $277, select.

London.$280 per passenger.Departing Mon, Jun 15.One-way flight with WestJet.Outbound indirect flight with WestJet, departing from Ottawa International on Mon, Jun 15, arriving in London Luton.Price includes taxes and charges.From $280, select.

London.$306 per passenger.Departing Tue, Jul 21.One-way flight with WestJet.Outbound indirect flight with WestJet, departing from Ottawa International on Tue, Jul 21, arriving in London Luton.Price includes taxes and charges.From $306, select.

London.$306 per passenger.Departing Tue, Sep 29.One-way flight with WestJet.Outbound indirect flight with WestJet, departing from Ottawa International on Tue, Sep 29, arriving in London Stansted.Price includes taxes and charges.From $306, select.

London.$308 per passenger.Departing Tue, Aug 18.One-way flight with WestJet.Outbound indirect flight with WestJet, departing from Ottawa International on Tue, Aug 18, arriving in London Luton.Price includes taxes and charges.From $308, select.

London.$316 per passenger.Departing Mon, Feb 9.One-way flight with Porter Airlines.Outbound indirect flight with Porter Airlines, departing from Ottawa International on Mon, Feb 9, arriving in London Gatwick.Price includes taxes and charges.From $316, 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 March.

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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	$256
Cheapest month to fly	March
Average flight time	6 hrs, 53 mins
Most popular airline	TAP Air Portugal
Average flights per week	35

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 round-trip flights from Ottawa to London?

The best price we found for a round-trip flight from Ottawa to London is $467. 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 52 minutes is the average flight time from Ottawa to London.

Which airlines fly direct from Ottawa to London?

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

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

There are 36 flights per week flying from Ottawa to London, as of January 2026.

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

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

What's the cheapest airport to fly to in London?

If you're flying from Ottawa, the cheapest airport near London is London Stansted – which is 30.2 miles away from the center of London. We've found flights to this airport from $467.

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 Monday, April 13, 2026.

Can I get a direct flight from Ottawa to London?

Yes – the average flight time is 6 hours and 52 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 January, the average temperature is usually around 39°F. August is typically the warmest month in London, when it usually averages around 72°F. You can expect the least rain in March. The coldest month is January, with temperatures averaging 35°F. The rainiest month is October.

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

The cheapest airline that flies to London is WestJet, and the cheapest airline that flies to London Heathrow Airport is Air Transat.

Flying from Ottawa to London: what you need to know

Ottawa's main base, Ottawa/Macdonald-Cartier International Airport (YOW), is where many unforgettable trips 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 Stansted Airport (STN). You can also disembark at London Luton Airport (LTN) and London City Airport (LCY) in London.
The average duration of a direct Ottawa to London flight is 6 hours 35 minutes.
London's timezone is UTC+0, which is the same as Ottawa.
For a smooth journey, turn up at the airport two hours ahead of international flights and an hour before domestic departures. That way, you can comfortably catch your Ottawa to London flight.
Delays at security and check-in are more likely if you're jetting off during high season, so give yourself some extra breathing room. A good rule of thumb for peak periods? Arrive up to four hours early for international flights and at least two hours for domestic departures.

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 jetting off from Ottawa/Macdonald-Cartier International Airport (YOW). Start your trip at YOW and end it at London Heathrow Airport (LHR).
Air Canada is a well-known carrier that offers direct Ottawa to London plane tickets from YOW.
Located around 7 miles from the center of Ottawa, YOW can be reached in about 20 minutes by car (depending on traffic). The journey on public transport takes roughly 45 minutes.
Booked an early flight from Ottawa to London? Avoid the hassle of rushing to the terminal (and enjoy a little extra shut-eye) by choosing one of these stays close to Ottawa/Macdonald-Cartier International Airport:
58.21% of flights taking off from Ottawa/Macdonald-Cartier International Airport arrive at their destination on time.
YOW's address is 50 Airport Road.

Arriving in London

London Heathrow Airport (LHR)

London Heathrow Airport (LHR) to central London takes about 55 minutes to reach by car. The center is roughly 14 miles away.
Traveling to the center by public transport typically takes 1 hour.
If you have a late flight from Ottawa to London, nothing beats the convenience of staying close to the terminal. Collect your bags from the carousel and then be showered and snoozing soon after at one of these accommodation options near LHR:
Hit the road running by picking up a London Heathrow Airport rental car. Grab your wheels from Surprice, U-Save or Green Motion and experience the lesser-explored corners of London and beyond.
Lock in the lowest price by reserving your vehicle from London Heathrow Airport around one week in advance of your trip.

London Gatwick Airport (LGW)

The center of London is located around 25 miles from London Gatwick Airport (LGW). After your flight from Ottawa to London has touched down and you've made your way out of the airport, expect a drive of about 1 hour 20 minutes.
You can expect the journey to take approximately 30 minutes on public transport.
You'll find some comfortable places to call home for the night near LGW. Tuck yourself in after your Ottawa to London flight at any of these perfectly located options:
Forget about inconvenient public transport schedules or cab lines. Pick up a London Gatwick Airport rental car and let your trip unfold on your terms. Check out the availability and rates from Green Motion, U-Save and Drivalia.
Secure your first choice, not your last resort. Booking your ride from LGW three weeks in advance often means lower prices and a wider choice of vehicles.

Stansted Airport (STN)

Hop off your flight from Ottawa to London and go straight to your hotel or jump right into sightseeing. Central London is around 30 miles from Stansted Airport (STN) and takes roughly 1 hour to reach by car.
The journey will take you around 1 hour 25 minutes when traveling on public transport.
If you don't want to travel into the center, find a hotel close to STN. Get comfortable at one of these stays after your Ottawa to London flight:
Be in the driver's seat of the next leg of your journey with a Stansted Airport rental car. Green Motion, Drivalia and Europcar make getting on the road smooth sailing.
If you're after a specific type of vehicle, book your ride from STN about four weeks ahead of your flight from Ottawa to London. This gives you a better shot at getting the car you prefer, along with a better deal.

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 52ºF and 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 32ºF and 48ºF.

More about London

Once you've booked your flight from Ottawa to London, find a hotel that offers the right mix of comfort and location. Make one of these accommodation options your base for exploring London:
There are so many things to see and do in this city it can be tricky to know where to begin. Big Ben, The British Museum and Buckingham Palace are top attractions which should feature on every London itinerary.

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 100 miles 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 110 miles west of London. No journey is complete without experiencing Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature Park.