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Cheap flights from Ottawa to London from £193

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 2/8. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LON
9 7月 — 16 7月1
1 adult

Cheapflights Tip: The best prices from Ottawa to London are usually found in February or March, booked 54 days in advance, depart on a Wednesday or Monday and return on a Thursday

Cheap 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 4 7月 2025.

Round-trip from

£514

One-way from

£193

Popular in

December

Cheapest in

February

Average price

£585
26/9-5/10
  • 26/9-5/10
  • 3 total stops
  • 41h 37m total
  • Ottawa to London
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2/8
  • 2/8
  • 1 total stop
  • 16h 50m total
  • Ottawa to London
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£26 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
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Find flight deals from Ottawa to London

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 4 7月 2025.

週五 26/905:55YOW - LGW
1 stop23h 50mMultiple Airlines
週日 5/1011:35LGW - YOW
2 stops17h 47mMultiple Airlines
Deal found 2/7£514
週五 12/915:55YOW - LHR
2 stops14h 50mUnited Airlines
週日 21/908:30LHR - YOW
1 stop13h 36mUnited Airlines
Deal found 2/7£514
週一 11/811:20YOW - LGW
1 stop18h 25mPorter Airlines
週一 25/809:40LGW - YOW
1 stop15h 56mPorter Airlines
Deal found 2/7£522
週四 4/908:35YOW - LGW
1 stop21h 10mAir Transat
週一 15/909:40LGW - YOW
1 stop12h 41mAir Transat
Deal found 2/7£539
週一 18/807:00YOW - LHR
1 stop9h 00mAir Canada
週一 25/812:40LHR - YOW
1 stop15h 28mAir Canada
Deal found 3/7£546
週一 21/707:00YOW - LHR
1 stop9h 00mMultiple Airlines
週四 14/808:40LHR - YOW
2 stops19h 28mMultiple Airlines
Deal found 2/7£551
週一 22/913:55YOW - LHR
2 stops13h 05mAer Lingus
週四 16/1008:50LHR - YOW
2 stops20h 29mAer Lingus
Deal found 3/7£555
週四 18/917:05YOW - STN
2 stops24h 20mMultiple Airlines
週四 25/922:55STN - YOW
2 stops30h 27mMultiple Airlines
Deal found 3/7£558
週三 3/916:05YOW - LHR
1 stop9h 25mLufthansa
週三 10/912:40LHR - YOW
Nonstop7h 20mLufthansa
Deal found 2/7£565
週四 25/917:15YOW - LHR
1 stop15h 30mAir France
週二 30/1206:20LHR - YOW
1 stop13h 50mAir France
Deal found 2/7£571
週四 18/917:05YOW - LTN
2 stops15h 00mMultiple Airlines
週四 25/908:45LTN - YOW
2 stops20h 37mMultiple Airlines
Deal found 3/7£576
週日 19/1015:55YOW - LCY
2 stops20h 35mSWISS
週二 28/1017:45LCY - YOW
2 stops31h 33mSWISS
Deal found 3/7£615

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 4 7月 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

週五 26/9

05:55-10:45

1 stop23h 50m

London Gatwick

週日 5/10

11:35-00:22

2 stops17h 47m

£514

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

週五 12/9

15:55-11:45

2 stops14h 50m

London Heathrow

週日 21/9

08:30-17:06

1 stop13h 36m

£514

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

週一 11/8

11:20-10:45

1 stop18h 25m

London Gatwick

週一 25/8

09:40-20:36

1 stop15h 56m

£522

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

週四 4/9

08:35-10:45

1 stop21h 10m

London Gatwick

週四 11/9

10:00-17:21

1 stop12h 21m

£539

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

週一 18/8

07:00-21:00

1 stop9h 00m

London Heathrow

週一 25/8

12:40-23:08

1 stop15h 28m

£546

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

週一 21/7

07:00-21:00

1 stop9h 00m

London Heathrow

週四 14/8

08:40-23:08

2 stops19h 28m

£551

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

週一 22/9

13:55-08:00

2 stops13h 05m

London Heathrow

週四 16/10

08:50-00:19

2 stops20h 29m

£555

OttawaLondon

YOW - STN

YOWSTN

Ottawa

週四 18/9

17:05-22:25

2 stops24h 20m

London Stansted

週四 25/9

22:55-00:22

2 stops30h 27m

£558

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

週三 3/9

21:00-08:35

Nonstop6h 35m

London Heathrow

週四 11/9

14:05-16:25

Nonstop7h 20m

£565

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

週四 25/9

17:15-13:45

1 stop15h 30m

London Heathrow

週二 30/12

06:20-15:10

1 stop13h 50m

£571

Flights are sorted by cheapest return flights first.

Deals found on 2/7

Showing 1-10 of 33 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 27 June 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 54 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, January is the cheapest month in which you can book a flight from Ottawa to London (average of £112). Flying from Ottawa to London in August is currently the most expensive (average of £164). 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 4 7月 2025.

It’s typically best to fly out from Ottawa to London in the afternoon. Doing so could potentially save you 19% on the flight price compared to flying at midday, which is usually more expensive.

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 4 7月 2025.
Check out reviews from past customers who have flown with Porter Airlines, KLM, andAir Transat 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.
Porter Airlines
8.0
Very Good
297 reviews
Check prices

Boarding

8.2

Entertainment

7.1

Crew

8.7

Food

7.7

Overall

8.0

Comfort

8.1

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
Porter Airlines
8.0
Very Good
297 reviews
Porter Airlines
8.0
Very Good
297 reviews
Check prices

Boarding

8.2

Entertainment

7.1

Crew

8.7

Food

7.7

Overall

8.0

Comfort

8.1

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
KLM
7.8
Good
1,367 reviews
Porter Airlines
8.0
Very Good
297 reviews
Check prices

Boarding

8.2

Entertainment

7.1

Crew

8.7

Food

7.7

Overall

8.0

Comfort

8.1

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
Air Transat
7.8
Good
407 reviews
Porter Airlines
8.0
Very Good
297 reviews
Check prices

Boarding

8.2

Entertainment

7.1

Crew

8.7

Food

7.7

Overall

8.0

Comfort

8.1

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
Air France
7.5
Good
1,465 reviews
Porter Airlines
8.0
Very Good
297 reviews
Check prices

Boarding

8.2

Entertainment

7.1

Crew

8.7

Food

7.7

Overall

8.0

Comfort

8.1

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!
SWISS
7.5
Good
1,654 reviews
Porter Airlines
8.0
Very Good
297 reviews
Check prices

Boarding

8.2

Entertainment

7.1

Crew

8.7

Food

7.7

Overall

8.0

Comfort

8.1

Reviews

1 / 20
4.0
Okay

Mary,Jun 2025

FLL - YYZ

Fort Lauderdale staff was not helpful at all to try to accommodate my husband and myself to sit together. Also very surprised to get charged USD53 for each of our checked luggage, as when we booked the tickets online, the website indicated that our first checked luggage will be charged CAD50!! Very misleading!!!

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.

  • What are the cheapest airlines flying from Ottawa to London round-trip?

    Cheapflights users have booked flights from Ottawa to London round-trip from £514. Other airlines that can offer you cheap pricing are Porter Airlines, from £522, and Air Transat, from £539. United Airlines is priced at 7% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Ottawa to London one-way?

    £252 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on WestJet and Air Transat, with prices starting from £256 and £264, respectively.

  • 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 Air Canada (77%), Aegean Airlines (77%) and Austrian Airlines (77%).

  • 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, January is the cheapest month in which you can book a flight from Ottawa to London (average of £112). Flying from Ottawa to London in August is currently the most expensive (average of £164). 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 Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Hounslow
Croydon
Milton Keynes
Deal
Gatwick
Luton
Slough
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Crawley
Eastbourne
Ilford
Hayes
Folkestone
Southend-on-Sea
Watford
Ipswich
Winchester
Maidstone
Guildford
Chichester

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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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Ottawa to Luton flights
Pierre Elliott Trudeau Intl to Newcastle upon Tyne flights
Toronto Island to Newcastle upon Tyne flights

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 4 7月 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£472Average£589FlexibilityNo 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?

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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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