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Cheap flights from Ottawa to London Heathrow Airport from C$ 432

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 16/6. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
4 May — 11 May1
1 adult

Cheapflights Tip: The best prices from Ottawa to London Heathrow are usually found in February or January, booked 56 days in advance, depart on a Saturday or Sunday and return on a Monday

Cheap flight deals from Ottawa to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Heathrow (LHR). 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 29 April 2025.

Round-trip from

C$ 894

One-way from

C$ 432

Popular in

December

Cheapest in

February

Average price

C$ 992

Good round-trip deal

C$ 997 or less

Good one-way deal

C$ 863 or less
United Airlines
  • United Airlines
  • 3/6-10/6
  • 3 total stops
  • 25h 13m total
  • Ottawa to London
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16/6
  • 16/6
  • 2 total stops
  • 34h 55m total
  • Ottawa to London
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Highest demand for flights based on searches. 5% potential increase in price (C$ 82 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 44 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Ottawa to London Heathrow.
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Price to beat on a one-way flight from Ottawa to London Heathrow.
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Find flight deals from Ottawa to Heathrow

Cheapest flights from Ottawa to Heathrow
Explore the most affordable flight options available from Ottawa to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.

Tue 3/62:40 p.m.YOW - LHR
1 stop11h 15mUnited Airlines
Tue 10/67:45 a.m.LHR - YOW
2 stops13h 58mUnited Airlines
Deal found 28/4C$ 894
Thu 6/115:20 p.m.YOW - LHR
1 stop18h 15mVirgin Atlantic
Sun 16/116:20 a.m.LHR - YOW
1 stop13h 50mVirgin Atlantic
Deal found 28/4C$ 902
Fri 16/58:55 p.m.YOW - LHR
1 stop28h 35mMultiple Airlines
Sat 31/54:40 p.m.LHR - YOW
1 stop26h 47mMultiple Airlines
Deal found 28/4C$ 977
Thu 8/57:00 a.m.YOW - LHR
1 stop9h 00mAir Canada
Wed 14/59:30 a.m.LHR - YOW
1 stop17h 37mAir Canada
Deal found 28/4C$ 999
Fri 20/68:55 p.m.YOW - LHR
1 stop28h 35mLufthansa
Thu 3/711:30 a.m.LHR - YOW
2 stops15h 35mLufthansa
Deal found 28/4C$ 1,028
Thu 8/56:40 p.m.YOW - LHR
2 stops14h 00mSWISS
Wed 14/57:00 a.m.LHR - YOW
2 stops18h 17mSWISS
Deal found 28/4C$ 1,041
Tue 6/51:55 p.m.YOW - LHR
2 stops26h 45mAustrian Airlines
Fri 19/96:00 a.m.LHR - YOW
2 stops16h 04mAustrian Airlines
Deal found 27/4C$ 1,073
Thu 6/115:20 p.m.YOW - LHR
2 stops15h 30mKLM
Sun 16/118:40 a.m.LHR - YOW
2 stops20h 30mKLM
Deal found 28/4C$ 1,088
Mon 12/54:05 p.m.YOW - LHR
2 stops13h 10mBrussels Airlines
Thu 22/56:50 a.m.LHR - YOW
2 stops12h 00mBrussels Airlines
Deal found 28/4C$ 1,129
Tue 3/61:55 p.m.YOW - LHR
2 stops14h 10mAer Lingus
Tue 10/69:50 a.m.LHR - YOW
2 stops16h 19mAer Lingus
Deal found 28/4C$ 1,193
Mon 1/95:15 p.m.YOW - LHR
1 stop18h 20mAir France
Mon 22/93:20 p.m.LHR - YOW
2 stops14h 02mAir France
Deal found 28/4C$ 1,247

Cheapflights Fare Finder

Customize your flight search to find flights from Ottawa to Heathrow 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 29 April 2025.
Use the filters below to find and compare flights from Ottawa to London Heathrow Airport that are best for you.

Fly from

Ottawa

Fly to

Heathrow

Route

Depart

Return

Price

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 3/6

2:40 p.m.-6:55 a.m.

1 stop11h 15m

London Heathrow

Tue 10/6

7:45 a.m.-4:43 p.m.

2 stops13h 58m

C$ 894

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 16/5

8:55 p.m.-6:30 a.m.

1 stop28h 35m

London Heathrow

Sat 31/5

4:40 p.m.-2:27 p.m.

1 stop26h 47m

C$ 977

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 15/6

6:40 p.m.-9:35 a.m.

1 stop9h 55m

London Heathrow

Mon 23/6

2:05 p.m.-4:25 p.m.

Nonstop7h 20m

C$ 1,016

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 20/6

8:55 p.m.-6:30 a.m.

1 stop28h 35m

London Heathrow

Thu 3/7

11:30 a.m.-10:05 p.m.

2 stops15h 35m

C$ 1,028

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 10/6

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

2 stops20h 55m

London Heathrow

Tue 17/6

7:00 a.m.-8:17 p.m.

2 stops18h 17m

C$ 1,066

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 13/6

7:55 p.m.-8:20 a.m.

2 stops55h 25m

London Heathrow

Mon 23/6

6:00 a.m.-5:05 p.m.

2 stops16h 05m

C$ 1,073

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 12/5

4:05 p.m.-10:15 a.m.

2 stops13h 10m

London Heathrow

Thu 22/5

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

2 stops12h 00m

C$ 1,129

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 3/6

1:55 p.m.-9:05 a.m.

2 stops14h 10m

London Heathrow

Tue 10/6

9:50 a.m.-9:09 p.m.

2 stops16h 19m

C$ 1,193

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 1/9

5:15 p.m.-4:35 p.m.

1 stop18h 20m

London Heathrow

Mon 22/9

3:20 p.m.-12:22 a.m.

2 stops14h 02m

C$ 1,247

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 8/6

5:15 p.m.-1:50 p.m.

2 stops15h 35m

London Heathrow

Fri 15/8

2:45 p.m.-12:22 a.m.

2 stops14h 37m

C$ 1,343

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Showing 1-10 of 18 results
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Best time to book a flight from Ottawa to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 Heathrow Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to Heathrow. Price data was last updated on 25 April 2025.

The best time to book flights from Ottawa to London Heathrow Airport is 56 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of C$ 560). Flying from Ottawa to London Heathrow Airport in July is currently the most expensive (average of C$ 870). 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 LHR?

Find hourly flight availability from Ottawa to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 April 2025.

It’s typically best to fly out from Ottawa to London Heathrow Airport in the evening. Doing so could potentially save you 5% on the flight price compared to flying in the afternoon, which is usually more expensive.

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

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

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

Rainfall in Heathrow by month

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

In terms of precipitation, rainfall in London Heathrow Airport 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 Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

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

If weather is an important factor for your trip to London Heathrow Airport, 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 Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 29 April 2025.
See what other customers who have flown with Delta, KLM and Austrian Airlines from Ottawa to London have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,929 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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
7,929 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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
1,333 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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
780 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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.
SWISS
7.5
Good
1,587 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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 France
7.4
Good
1,444 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

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 Heathrow. 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 Heathrow?

    Most people fly from Ottawa (YOW) if they book a flight from Ottawa to London Heathrow. On average, Ottawa has 4 outbound flights to London Heathrow per day from 4 airlines. Ottawa is conveniently located just 10.6 km from Ottawa’s city centre.

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

    Cheapflights users have booked flights from Ottawa to London Heathrow Airport round-trip from C$ 894. Other airlines that can offer you cheap pricing are Air Canada, from C$ 999, and Lufthansa, from C$ 1,028. United Airlines is 18% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapest airlines for a one-way flight from Ottawa to London Heathrow Airport are Air Canada (C$ 560), Lufthansa (C$ 595), and SWISS (C$ 621).

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

    The top 3 most reliable airlines when flying from Ottawa to London Heathrow Airport are Air Canada (89%), Aegean Airlines (89%) and Austrian Airlines (89%).

  • What are the cheapest flights from Ottawa to London Heathrow Airport?

    On average you can expect to pay C$ 1,556 for a flight from Ottawa to London Heathrow Airport. The cheapest flight overall is C$ 823 while the most popular route, (Ottawa - London Heathrow) is currently priced at C$ 883.

  • Where are the most common layover locations when flying from Ottawa to London Heathrow Airport?

    Most of the time, Ottawa to London Heathrow Airport flights that have layovers will stop in Montreal.

  • What are some popular things to do or see while on a layover in Montreal?

    The majority of Montreal visitors spend their time at Centre Bell, Vieux-Port de Montréal, and Notre-Dame Basilica. Travelers on a layover in Montreal can visit Centre Bell, Vieux-Port de Montréal, and Notre-Dame Basilica, by traveling 14.6 km, 16.2 km, and 15.9 km, respectively after landing at Montreal Pierre Elliott Trudeau Intl. Those looking to explore during their layover in Montreal can rent a car from Montreal Pierre Elliott Trudeau Intl for about C$ 55 per day.

  • Where are the least popular layover locations for Ottawa to London Heathrow Airport flights?

    Flights departing from Ottawa and landing in London Heathrow Airport layover in Toronto least frequently.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ottawa to Heathrow 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 Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of C$ 560). Flying from Ottawa to London Heathrow Airport in July is currently the most expensive (average of C$ 870). 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

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Fly from Ottawa to Heathrow on these airlines

Choose from the following airlines for your flight from Ottawa to Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 29 April 2025.
Air Canada flights from Ottawa to London Heathrow
Lufthansa flights from Ottawa to London Heathrow

Top 4 airlines flying from Ottawa to Heathrow

Discover the top 4 airlines that operate flights from Ottawa to Heathrow. 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 29 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapestC$ 734AverageC$ 826FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air FranceCheapestC$ 735AverageC$ 924FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapestC$ 909AverageC$ 1,071FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 952AverageC$ 1,053FlexibilityNo 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 Heathrow?

When you search for this flight from Ottawa to Heathrow, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Ottawa to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Yes, we can. To see specific flights from Ottawa to Heathrow 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 Heathrow become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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