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Cheap flights from Ottawa to London from C$ 400

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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LON
26 mar. — 2 abr.1
1 adult

Cheapflights Tip: The best prices from Ottawa to London are usually found in February or January, booked 86 days in advance, depart on a Saturday or Sunday and return on a Monday

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 21 marzo 2025.

Round-trip from

C$ 935

One-way from

C$ 400

Popular in

December

Cheapest in

February

Average price

C$ 1,037

Good round-trip deal

C$ 1,023 or less

Good one-way deal

C$ 1,012 or less
13/5-9/6
  • 13/5-9/6
  • 5 total stops
  • 52h 47m total
  • Ottawa to London
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5/4
  • 5/4
  • 1 total stop
  • 19h 35m total
  • Ottawa to London
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Highest demand for flights based on searches. 3% potential increase in price (C$ 57 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 33 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Ottawa to London (LON).
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Price to beat on a one-way flight from Ottawa to London (LON).
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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 21 marzo 2025.

mar. 13/55:15 a.m.YOW - LGW
2 stops20h 05mMultiple Airlines
lun. 9/68:40 p.m.LGW - YOW
3 stops32h 42mMultiple Airlines
Deal found 20/3C$ 935
mié. 26/37:15 a.m.YOW - LHR
1 stop9h 20mMultiple Airlines
jue. 3/42:05 p.m.LHR - YOW
Nonstop7h 30mMultiple Airlines
Deal found 20/3C$ 935
lun. 28/44:45 p.m.YOW - LHR
1 stop12h 15mLufthansa
vie. 9/512:05 p.m.LHR - YOW
1 stop11h 59mLufthansa
Deal found 21/3C$ 942
mar. 13/53:55 p.m.YOW - LGW
2 stops20h 55mSWISS
mié. 11/66:35 p.m.LGW - YOW
2 stops51h 29mSWISS
Deal found 20/3C$ 946
mar. 13/51:55 p.m.YOW - LHR
2 stops26h 50mSWISS
mar. 10/66:00 a.m.LHR - YOW
2 stops20h 09mSWISS
Deal found 20/3C$ 952
lun. 12/55:55 a.m.YOW - STN
2 stops28h 25mMultiple Airlines
mar. 10/610:45 a.m.STN - YOW
3 stops42h 37mMultiple Airlines
Deal found 20/3C$ 962
dom. 6/44:00 p.m.YOW - LHR
2 stops20h 05mBrussels Airlines
mar. 6/56:50 a.m.LHR - YOW
2 stops11h 55mBrussels Airlines
Deal found 20/3C$ 964
mar. 20/56:00 a.m.YOW - LTN
2 stops36h 35mMultiple Airlines
vie. 13/69:05 p.m.LTN - YOW
2 stops32h 17mMultiple Airlines
Deal found 20/3C$ 981
mié. 4/64:40 p.m.YOW - LGW
1 stop13h 05mPorter Airlines
lun. 16/612:40 p.m.LGW - YOW
1 stop13h 21mPorter Airlines
Deal found 20/3C$ 992
mié. 11/69:50 a.m.YOW - LHR
2 stops16h 25mUnited Airlines
lun. 30/66:50 a.m.LHR - YOW
2 stops21h 53mUnited Airlines
Deal found 20/3C$ 992
dom. 27/45:05 p.m.YOW - LGW
1 stop12h 40mAir Transat
vie. 9/512:40 p.m.LGW - YOW
1 stop13h 21mAir Transat
Deal found 21/3C$ 1,002
mar. 25/112:45 p.m.YOW - LCY
2 stops20h 55mLufthansa
mié. 3/1210:00 a.m.LCY - YOW
2 stops18h 47mLufthansa
Deal found 20/3C$ 1,021

Cheapflights Fare Finder

Customize 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 629,999 searches. Data last updated 21 marzo 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

mar. 13/5

5:15 a.m.-6:20 a.m.

2 stops20h 05m

London Gatwick

lun. 9/6

8:40 p.m.-12:22 a.m.

3 stops32h 42m

C$ 935

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

jue. 22/5

6:40 p.m.-10:00 a.m.

1 stop10h 20m

London Heathrow

lun. 26/5

2:05 p.m.-4:35 p.m.

Nonstop7h 30m

C$ 935

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

mar. 13/5

2:30 p.m.-6:30 a.m.

1 stop11h 00m

London Heathrow

mar. 27/5

5:50 p.m.-1:45 p.m.

2 stops24h 55m

C$ 936

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

mar. 13/5

3:55 p.m.-5:50 p.m.

2 stops20h 55m

London Gatwick

mié. 11/6

6:35 p.m.-5:04 p.m.

2 stops51h 29m

C$ 946

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

mar. 13/5

1:55 p.m.-1:00 p.m.

2 stops18h 05m

London Heathrow

jue. 12/6

5:10 p.m.-5:04 p.m.

2 stops52h 54m

C$ 952

OttawaLondon

YOW - STN

YOWSTN

Ottawa

lun. 12/5

5:55 a.m.-3:20 p.m.

2 stops28h 25m

London Stansted

mar. 10/6

10:45 a.m.-12:22 a.m.

3 stops42h 37m

C$ 962

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

dom. 6/4

4:00 p.m.-5:05 p.m.

2 stops20h 05m

London Heathrow

mar. 6/5

6:50 a.m.-1:45 p.m.

2 stops11h 55m

C$ 964

OttawaLondon

YOW - LTN

YOWLTN

Ottawa

mar. 20/5

6:00 a.m.-11:35 p.m.

2 stops36h 35m

London Luton

vie. 13/6

9:05 p.m.-12:22 a.m.

2 stops32h 17m

C$ 981

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

mié. 4/6

4:40 p.m.-10:45 a.m.

1 stop13h 05m

London Gatwick

lun. 16/6

12:40 p.m.-9:01 p.m.

1 stop13h 21m

C$ 992

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

mié. 11/6

9:50 a.m.-7:15 a.m.

2 stops16h 25m

London Heathrow

lun. 30/6

6:50 a.m.-11:43 p.m.

2 stops21h 53m

C$ 992

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/3

Showing 1-10 of 42 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 round-trip 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 round-trip flight from Ottawa to London. Price data was last updated on 14 March 2025.

Booking 86 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ottawa to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 C$ 560). Flying from Ottawa to London in July is currently the most expensive (average of C$ 874). 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 21 marzo 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 6% on flights from Ottawa to London by exploring options for tickets in the morning.

What is the cheapest day to fly from Ottawa to London?

Use this chart to determine the cheapest time to fly round-trip from Ottawa to London. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Ottawa to London flight should consider departing on Sunday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 mm per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 21 marzo 2025.
See what other customers who have flown with Delta, Porter Airlines and KLM from Ottawa to London have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,895 reviews
Check prices

Overall

8.0

Comfort

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,895 reviews
Delta
8.0
Very good
7,895 reviews
Check prices

Overall

8.0

Comfort

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Porter Airlines
7.9
Good
275 reviews
Delta
8.0
Very good
7,895 reviews
Check prices

Overall

8.0

Comfort

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,319 reviews
Delta
8.0
Very good
7,895 reviews
Check prices

Overall

8.0

Comfort

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Transat
7.8
Good
380 reviews
Delta
8.0
Very good
7,895 reviews
Check prices

Overall

8.0

Comfort

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
768 reviews
Delta
8.0
Very good
7,895 reviews
Check prices

Overall

8.0

Comfort

8.0

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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?

    Ottawa (YOW) is the airport you will fly out of if you book a flight from Ottawa to London. You should not have trouble finding flights to London from Ottawa; the airport handles an average of 0 outbound flights to London per day. You should also have plenty of airline options to choose from since 6 airlines have flights from the Ottawa airport to London. It is only a 10.6 km journey to Ottawa (YOW) from Ottawa’s city centre.

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

    Our cheapest airline available from Ottawa to London is Lufthansa. Our recent data shows that you can find tickets from as low as C$ 935 on this airline. Additional options worth looking into are SWISS and Porter Airlines, starting at C$ 946 and C$ 964 round-trip. You may be able to fly from Ottawa to London for 16% less than the average price by searching for these airlines.

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

    To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at C$ 449. Air Transat flights start at C$ 624 while deals on Porter Airlines start at C$ 631 one-way.

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

    Most travellers choose Ottawa - London Heathrow, Ottawa - London Gatwick or Ottawa - London City when deciding on the best route from Ottawa to London.

  • What are the cheapest flights from Ottawa to London?

    The cheapest flight price from Ottawa to London is C$ 937. On average you can expect to pay C$ 1,064. The most popular route, (Ottawa - London Heathrow), can usually be booked for C$ 872.

  • 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 vacation 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 C$ 560). Flying from Ottawa to London in July is currently the most expensive (average of C$ 874). 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
Brentford
Hounslow
Sutton
Slough
Milton Keynes
Romford
Watford
Luton
Bromley
Bedford
Southall

Browse thousands of different options on Cheapflights for your next trip

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Fly from Ottawa to London on these airlines

Choose from the following airlines for your flight from Ottawa to London. Flights are based on user searches made on Cheapflights and were last updated on 21 marzo 2025.
Air Canada flights from Ottawa to London
Air Transat flights from Ottawa to London
Lufthansa flights from Ottawa to London

Top 6 airlines flying from Ottawa to London

Discover the top 6 airlines 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 629,999 searches. Data last updated 21 marzo 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapestC$ 760AverageC$ 854FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air FranceCheapestC$ 760AverageC$ 956FlexibilityNo cancel feeOn-time77%
Search Air France flights
Porter AirlinesCheapestC$ 951AverageC$ 1,130FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air TransatCheapestC$ 981AverageC$ 1,143FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Air CanadaCheapestC$ 986AverageC$ 1,144FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 1,008AverageC$ 1,119FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights helps you search for flights from Ottawa to London via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ottawa to London for you. Better yet — we are completely free to use.

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

Need flexible booking options for your flight to London from Ottawa? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes! Start tracking prices for Ottawa to London flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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