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Cheap flights from Ottawa to London from £208

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/1. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LON
22 Jan — 29 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Ottawa to London are usually found in February or November, booked 44 days in advance, depart on a Monday or Tuesday and return on a Friday

Cheap flight deals from Ottawa to London

Enter your travel dates to find the best prices.

Cheapest flights from Ottawa to London
Explore the most affordable flight options available from Ottawa to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 December 2025.

Tue 30/1216:40YOW - LHR
1 stop22h 55mAir Canada
Tue 21/412:40LHR - YOW
1 stop9h 48mAir Canada
Deal found 21/12£577
Wed 31/1221:55YOW - LHR
Nonstop6h 25mAir Canada
Thu 16/409:30LHR - YOW
Nonstop7h 55mAir Canada
Deal found 21/12£578
Wed 31/1205:45YOW - LHR
1 stop20h 25mAir Canada
Wed 15/412:40LHR - YOW
1 stop9h 48mAir Canada
Deal found 21/12£579
Tue 30/1206:00YOW - LHR
1 stop19h 30mAir Canada
Thu 16/409:30LHR - YOW
Nonstop7h 55mAir Canada
Deal found 21/12£583
Wed 31/1221:55YOW - LHR
Nonstop6h 25mAir Canada
Thu 8/109:00LHR - YOW
1 stop30h 21mAir Canada
Deal found 21/12£605
Wed 31/1218:05YOW - LHR
1 stop12h 15mMultiple Airlines
Thu 8/109:00LHR - YOW
1 stop13h 43mMultiple Airlines
Deal found 21/12£606
Wed 31/1217:59YOW - LHR
1 stop10h 11mUnited Airlines
Tue 21/409:30LHR - YOW
2 stops19h 24mUnited Airlines
Deal found 21/12£616
Tue 30/1206:00YOW - LHR
2 stops18h 55mUnited Airlines
Wed 15/410:25LHR - YOW
2 stops18h 29mUnited Airlines
Deal found 21/12£621
Tue 30/1206:00YOW - LHR
2 stops18h 55mUnited Airlines
Thu 16/416:40LHR - YOW
1 stop22h 23mUnited Airlines
Deal found 21/12£622
Tue 30/1218:55YOW - LGW
1 stop9h 50mAir Transat
Tue 21/412:40LGW - YOW
1 stop24h 45mAir Transat
Deal found 21/12£711
Wed 31/1215:55YOW - LGW
2 stops20h 55mMultiple Airlines
Thu 16/414:00LGW - YOW
1 stop14h 58mMultiple Airlines
Deal found 21/12£726
Tue 30/1218:55YOW - LGW
1 stop9h 50mAir Transat
Sat 18/412:40LGW - YOW
1 stop24h 45mAir Transat
Deal found 21/12£731

Find flight deals from Ottawa to London

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 23 December 2025.

Round-trip from

£415

One-way from

£208

Popular in

December

Cheapest in

February

Average price

£662

Good round-trip deal

£481 or less
Air Transat
  • Air Transat
  • 3/2-10/2
  • 2 total stops
  • 36h 48m total
  • Ottawa to London
Search Deals
26/1
  • 26/1
  • 2 total stops
  • 26h 10m total
  • Ottawa to London
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£11 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Ottawa to London (LON).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ottawa to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 23 December 2025.
Use the filters below to find and compare flights from Ottawa to London that are best for you.

Fly from

Ottawa

Fly to

London

Route

Depart

Return

Price

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Sun 8/2

06:45-09:45

1 stop22h 00m

London Gatwick

Mon 2/3

11:40-00:41

1 stop18h 01m

£447

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Sat 30/5

14:20-10:45

1 stop15h 25m

London Gatwick

Mon 15/6

12:40-08:05

1 stop24h 25m

£462

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Mon 1/6

17:05-07:55

1 stop9h 50m

London Gatwick

Fri 5/6

09:40-12:40

Nonstop8h 00m

£465

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Sun 31/5

17:05-10:45

1 stop12h 40m

London Gatwick

Sun 7/6

09:40-12:40

Nonstop8h 00m

£465

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Fri 22/5

19:40-07:55

Nonstop7h 15m

London Gatwick

Fri 5/6

12:40-00:21

1 stop16h 41m

£465

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Thu 28/5

17:05-07:55

1 stop9h 50m

London Gatwick

Tue 2/6

09:40-12:40

Nonstop8h 00m

£465

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Mon 1/6

17:05-07:55

1 stop9h 50m

London Gatwick

Wed 3/6

09:40-20:01

1 stop15h 21m

£470

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Wed 3/6

17:05-10:45

1 stop12h 40m

London Gatwick

Mon 8/6

12:40-20:01

1 stop12h 21m

£470

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 25/5

08:50-21:00

1 stop31h 10m

London Heathrow

Sun 7/6

09:30-19:51

2 stops15h 21m

£485

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Fri 16/1

12:00-23:55

2 stops30h 55m

London Stansted

Fri 23/1

06:50-18:38

2 stops16h 48m

£489

Flights are sorted by cheapest return flights first.

Deals found on 21/12

Showing 1-10 of 60 results
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Best time to book a flight from Ottawa to London

Have a flexible travel schedule? Discover the best time to fly to London from Ottawa with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ottawa to London

How far ahead should I book a flight from Ottawa to London?

Use this chart to determine the optimal time to book a return flight from Ottawa to London. Price data was last updated on 19 December 2025.

The price you pay for your flight from Ottawa to London may vary depending on when you book. For the best chance of a lower fare, look to book 44 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Ottawa to London?

Currently, December is the cheapest month in which you can book a flight from Ottawa to London (average of £256). Flying from Ottawa to London in July is currently the most expensive (average of £480). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from YOW to LON?

Find hourly flight availability from Ottawa to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 23 December 2025.

It’s typically best to fly out from Ottawa to London in the evening. Doing so could potentially save you 38% on the flight price compared to flying at midday, which is usually more expensive.

What’s the top stopover airport for flights from Ottawa to London?

Share of one-stop return flights from Ottawa to London chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Toronto (YYZ) – chosen by Cheapflights users on 50% of one-stop itineraries from Ottawa to London on Cheapflights.

What’s the cheapest stopover airport for flights from Ottawa to London?

Average return fare for one-stop flights from Ottawa to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Paris (CDG) is the most affordable one-stop option, with an average return flight price of £445.

What’s the fastest stopover option from Ottawa to London?

Shortest average travel time for one-stop one-way flights from Ottawa to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Halifax (YHZ) have the shortest average one-way travel time for one-stop routes: 9h 00m.

Which airport typically offers the quickest stopover for flights from Ottawa to London?

Average stopover duration for one-stop one-way flights from Ottawa to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Halifax (YHZ) offer the fastest connection on this route, with an average stopover time of 1h 16m.

How often are flights from Ottawa to London delayed?

About 16% of weekly flights between Ottawa and London have experienced delays in the past year, with the average delay time being 141 minutes.

What is the most punctual flight time for Ottawa to London flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Ottawa to London flights?

Over the past year, Air Canada have had the lowest number of delays on this route, with just 16% of flights being delayed.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 23 December 2025.
Check out reviews from past customers who have flown with Air Canada from Ottawa to London to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,551 reviews
Check prices

Boarding

7.3

Comfort

7.1

Entertainment

6.8

Overall

7.1

Crew

7.8

Food

6.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

YYZ - LAS

It's was great and the crew are very nice, captain has a smooth land on the runway 👍
Air Canada
7.1
Good
10,551 reviews
Air Canada
7.1
Good
10,551 reviews
Check prices

Boarding

7.3

Comfort

7.1

Entertainment

6.8

Overall

7.1

Crew

7.8

Food

6.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

YYZ - LAS

It's was great and the crew are very nice, captain has a smooth land on the runway 👍

Related info for your journey

Find useful and relevant information for your journey from Ottawa to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ottawa to London?

    Most people fly from Ottawa (YOW) if they book a flight from Ottawa to London. On average, Ottawa has 3 outbound flights to London per day from 1 airline. Ottawa is conveniently located just 6.6 mi from Ottawa’s city center.

  • How long is the flight from Ottawa to London?

    A quick flight from Ottawa to London can take about 19h 45m. Air Transat provides one of the quickest options available for as low as £492. The distance between Ottawa and London is about 3320 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What is the cheapest airline to fly from Ottawa to London round-trip?

    Cheapflights users have booked flights from Ottawa to London round-trip from £451. Air Canada is priced at 18% lower than the current average price of a flight leaving 3 months from now.

  • What are the most popular routes from Ottawa to London?

    While some choose either Ottawa - London Gatwick or Ottawa - London City, Ottawa - London Heathrow is the most popular route from Ottawa to London.

  • What are the most reliable airlines from Ottawa to London?

    The top 3 most reliable airlines when flying from Ottawa to London are United Airlines (68%), Air Canada (50%) and Aegean Airlines (50%).

  • What are the cheapest flights from Ottawa to London?

    While on average a flight from Ottawa to London is generally £491, our data shows the cheapest flight currently is £481. When looking at the most popular route, (Ottawa - London Heathrow), you can expect to pay £476 for that flight.

  • Can I find deals for flights from Ottawa to London that include hotel bookings?

    Yes. In addition to deals on Ottawa to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to London.

  • Can I find deals for business class flights from Ottawa to London?

    Yes. Cheapflights offers flight deals from Ottawa to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ottawa to London?

    Currently, December is the cheapest month in which you can book a flight from Ottawa to London (average of £256). Flying from Ottawa to London in July is currently the most expensive (average of £480). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London?

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Alternative routes for Ottawa to London

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Ottawa to London

Discover the top airline that operate flights from Ottawa to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 23 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£451Average£612FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Ottawa to London?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to London from Ottawa today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Ottawa to London?

Cheapflights helps you find that perfect flight to London from Ottawa by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Ottawa to London with no change fees?

Yes, we can. To see specific flights from Ottawa to London with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Ottawa to London become cheaper?

Not ready to book yet? You can track prices for flights from Ottawa to London on Cheapflights with our Price Alert feature and get notified when better prices are available.

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