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

Flights via Paris (CDG) offer the fastest connection on this route, with an average stopover time of 1h 28m.

How often are flights from Ottawa to London delayed?

About 25% of weekly flights between Ottawa and London have experienced delays in the past year, with the average delay time being 136 minutes.

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

Washington, D.C. (IAD) is the most affordable one-stop option, with an average return flight price of £491.

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

Flights via Paris (CDG) have the shortest average one-way travel time for one-stop routes: 9h 40m.

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 25% of flights being delayed.

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.

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

Toronto (YYZ) – chosen by Cheapflights users on 60% of one-stop itineraries from Ottawa to London Heathrow Airport on Cheapflights.

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.

How long is the flight from Ottawa to London Heathrow Airport?

For as low as £513, United Airlines can have you in London Heathrow Airport from Ottawa in 11h 05m. Ottawa and London Heathrow Airport are separated by a distance of 3320 mi.

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

According to our current data, Air Canada (£479), offers the cheapest pricing from Ottawa to London Heathrow Airport. You may be able to fly from Ottawa to London Heathrow Airport for 18% less than the average price by searching for this airline.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches 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.

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).

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

No one likes to see their flight delayed. When booking a flight from Ottawa to London Heathrow Airport consider choosing United Airlines (63%), Air Canada (56%) or Austrian Airlines (56%) as they are the most reliable in getting you off to your destination on time.

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

If you book a flight to London Heathrow from Ottawa, you will be flying from Ottawa, which is the city’s only airport. Ottawa (YOW) is located 6.6 mi from the center of Ottawa. There is 1 flight from Ottawa to London Heathrow per day from 1 airline.

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 holiday 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.

£248+ Cheap Flights from Ottawa to London Heathrow Airport

Q: How much does it cost for a return flight from Ottawa to London Heathrow Airport?

Airfare is below average for this route at the moment. Ottawa to London Heathrow Airport flights typically cost between £634 and £528 in May. The cheapest return flight price found within the last 3 days was £466 on Air Canada (22 May-29 May).

Cheapflights Tip: The best prices from Ottawa to London Heathrow are usually found in November or January, booked 68 days in advance, depart on a Tuesday or Thursday and return on a Friday

Cheap flight deals from Ottawa to Heathrow

Enter your travel dates to find the best prices.

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One-way

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 24 April 2026.

Fri 22/508:50

YOW

LHR

1 stop31h 10m

Air Canada

Fri 29/512:40

LHR

YOW

1 stop11h 13m

Air Canada

Deal found 24/4£466

Sat 6/617:50

YOW

LHR

1 stop11h 10m

Air Canada

Sat 13/612:40

LHR

YOW

1 stop11h 13m

Air Canada

Deal found 22/4£469

Mon 18/518:55

YOW

LHR

Nonstop6h 35m

Air Canada

Wed 27/514:10

LHR

YOW

Nonstop7h 55m

Air Canada

Deal found 22/4£470

Tue 2/608:50

YOW

LHR

1 stop31h 10m

Multiple Airlines

Tue 9/619:30

LHR

YOW

2 stops26h 41m

Multiple Airlines

Deal found 22/4£472

Mon 25/508:50

YOW

LHR

1 stop31h 10m

Air Canada

Mon 1/614:05

LHR

YOW

1 stop10h 41m

Air Canada

Deal found 24/4£472

Fri 29/517:30

YOW

LHR

1 stop22h 30m

Air Canada

Sat 6/612:40

LHR

YOW

1 stop11h 13m

Air Canada

Deal found 24/4£473

Wed 9/921:00

YOW

LHR

Nonstop6h 35m

Air Canada

Wed 23/908:40

LHR

YOW

2 stops31h 45m

Air Canada

Deal found 23/4£474

Fri 22/514:40

YOW

LHR

1 stop10h 50m

Multiple Airlines

Fri 29/512:40

LHR

YOW

1 stop11h 13m

Multiple Airlines

Deal found 24/4£476

Sat 26/915:10

YOW

LHR

1 stop10h 20m

Multiple Airlines

Wed 7/1012:40

LHR

YOW

1 stop11h 00m

Multiple Airlines

Deal found 22/4£477

Find flight deals from Ottawa to Heathrow

Round-trip from	£466
One-way from	£248
Popular in	December
Cheapest in	November
Average price	£562

Air Canada
22/5-29/5
2 total stops
42h 23m total
Ottawa to London

Search Deals

24/5
3 total stops
37h 15m total
Ottawa to London

Search Deals

Highest demand for flights based on searches. 1% potential increase in price (£5 potential increase over avg. return price).

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Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).

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Average for round-trip flights in April 2026

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Cheapflights Fare Finder

Use the filters below to find and compare flights from Ottawa to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 5/6

15:10-07:15

1 stop11h 05m

London Heathrow

Fri 12/6

06:55-18:48

2 stops16h 53m

£513

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 2/6

14:52-10:40

1 stop14h 48m

London Heathrow

Sat 6/6

09:30-16:38

1 stop12h 08m

£521

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 3/6

12:00-06:55

2 stops13h 55m

London Heathrow

Sat 6/6

11:05-16:38

2 stops34h 33m

£530

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 2/6

17:10-10:45

2 stops12h 35m

London Heathrow

Thu 18/6

08:55-15:00

1 stop11h 05m

£536

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 10/6

17:10-10:45

2 stops12h 35m

London Heathrow

Fri 19/6

06:15-15:00

1 stop13h 45m

£537

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 22/5

17:50-10:00

1 stop11h 10m

London Heathrow

Sat 20/6

09:30-19:45

1 stop15h 15m

£592

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 21/5

16:00-10:40

2 stops37h 40m

London Heathrow

Mon 21/9

06:50-09:56

2 stops32h 06m

£593

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 14/5

17:50-09:20

1 stop10h 30m

London Heathrow

Mon 18/5

15:20-10:03

2 stops23h 43m

£613

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 18/5

17:25-10:45

2 stops12h 20m

London Heathrow

Wed 27/5

06:30-15:00

2 stops13h 30m

£635

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 17/5

10:00-05:55

2 stops14h 55m

London Heathrow

Sun 24/5

06:50-16:38

2 stops14h 48m

£658

Flights are sorted by cheapest return flights first.

Deals found on 19/4

Showing 1-10 of 23 resultsSorted by cheapest first

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.

YOW-LHR

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 Heathrow Airport

Prices

Delays

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

Booking 67 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ottawa to London Heathrow Airport. 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 Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of £510). Flying from Ottawa to London Heathrow Airport in December is currently the most expensive (average of £739). 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?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ottawa to London Heathrow Airport as you normally would.

How much does it cost for a return flight from Ottawa to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Read reviews from past customers who have flown with Air Canada from Ottawa to London Heathrow Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Air Canada

7.1

Good

10,961 reviews

Check prices

Reviews

1 / 20

6.0

Good

Thomas,Apr 2026

YYZ - LHR

Food is sub par. I travel a lot and AC food is not good

Air Canada

7.1

Good

10,961 reviews

Air Canada

7.1

Good

10,961 reviews

Check prices

Reviews

1 / 20

6.0

Good

Thomas,Apr 2026

YYZ - LHR

Food is sub par. I travel a lot and AC food is not good

Related info for your journey

What airport do you fly from for flights from Ottawa to London Heathrow?
If you book a flight to London Heathrow from Ottawa, you will be flying from Ottawa, which is the city’s only airport. Ottawa (YOW) is located 6.6 mi from the center of Ottawa. There is 1 flight from Ottawa to London Heathrow per day from 1 airline.
How long is the flight from Ottawa to London Heathrow Airport?
For as low as £513, United Airlines can have you in London Heathrow Airport from Ottawa in 11h 05m. Ottawa and London Heathrow Airport are separated by a distance of 3320 mi.
What is the cheapest airline to fly from Ottawa to London Heathrow Airport round-trip?
According to our current data, Air Canada (£479), offers the cheapest pricing from Ottawa to London Heathrow Airport. You may be able to fly from Ottawa to London Heathrow Airport for 18% less than the average price by searching for this airline.
What are the most reliable airlines from Ottawa to London Heathrow Airport?
No one likes to see their flight delayed. When booking a flight from Ottawa to London Heathrow Airport consider choosing United Airlines (63%), Air Canada (56%) or Austrian Airlines (56%) as they are the most reliable in getting you off to your destination on time.
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 holiday 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, November is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of £510). Flying from Ottawa to London Heathrow Airport in December is currently the most expensive (average of £739). 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

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Top airline flying from Ottawa to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest£479	Average£623	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

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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.

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

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ottawa to Heathrow flexibly with Cheapflights today.

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Cheap flights from Ottawa to London Heathrow Airport from £248

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 24/5. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ottawa to Heathrow

Cheapest flights from Ottawa to HeathrowExplore 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 24 April 2026.

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 24 April 2026.

Best flights from Ottawa to HeathrowDiscover carefully curated flight deals from Ottawa to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 24 April 2026.

Discover carefully curated flight deals from Ottawa to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 24 April 2026.

Direct flights from Ottawa to HeathrowExplore direct flight options from Ottawa to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 24 April 2026.

Explore direct flight options from Ottawa to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 24 April 2026.

Last-minute flights from Ottawa to HeathrowDiscover last-minute flight deals from Ottawa to Heathrow. Data last updated 24 April 2026 and is based on user searches.

Discover last-minute flight deals from Ottawa to Heathrow. Data last updated 24 April 2026 and is based on user searches.

One-way flights from Ottawa to HeathrowSearch for one-way flight options from Ottawa to Heathrow. Find affordable one-way fares based on user searches. Data last updated 24 April 2026.

Search for one-way flight options from Ottawa to Heathrow. Find affordable one-way fares based on user searches. Data last updated 24 April 2026.

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Use the filters below to find and compare flights from Ottawa to London Heathrow Airport that are best for you.

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.

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?

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

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

How much does it cost for a return flight from Ottawa to London Heathrow Airport?

How often are flights from Ottawa to London delayed?

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

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

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

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

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

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

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

Reviews of airlines servicing Heathrow

Read reviews from past customers who have flown with Air Canada from Ottawa to London Heathrow Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

How long is the flight from Ottawa to London Heathrow Airport?

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

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

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

How can I find direct flights from Ottawa to Heathrow?

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

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

Travelling to a place near London Heathrow Airport?

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Other flights to Heathrow

Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 24 April 2026.

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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 24 April 2026.

Best flights from Ottawa to Heathrow
Discover carefully curated flight deals from Ottawa to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 24 April 2026.

Direct flights from Ottawa to Heathrow
Explore direct flight options from Ottawa to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 24 April 2026.

Last-minute flights from Ottawa to Heathrow
Discover last-minute flight deals from Ottawa to Heathrow. Data last updated 24 April 2026 and is based on user searches.

One-way flights from Ottawa to Heathrow
Search for one-way flight options from Ottawa to Heathrow. Find affordable one-way fares based on user searches. Data last updated 24 April 2026.