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.

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 142 minutes.

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.

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’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.

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 £494.

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.

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.

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

For as low as £570, United Airlines can have you in London Heathrow Airport from Ottawa in 12h 20m. Ottawa and London Heathrow Airport are separated by a distance of 3320 mi. This flight may include one or multiple stops.

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

According to our current data, Air Canada (£481), offers the cheapest pricing from Ottawa to London Heathrow Airport. You may be able to fly from Ottawa to London Heathrow Airport for 19% 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 Croatia Airlines (100%), United Airlines (71%) or TAP AIR PORTUGAL (70%) 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 are 2 flights 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.

£227+ 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 £721 and £592 in September. The cheapest return flight price found within the last 3 days was £461 on Austrian Airlines (7 Sept-23 Sept).

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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Direct

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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 29 May 2026.

Thu 4/618:55

YOW

LHR

Nonstop6h 35m

Austrian Airlines

Sat 13/606:00

LHR

YOW

2 stops19h 56m

Austrian Airlines

Deal found 28/5£457

Thu 4/618:55

YOW

LHR

Nonstop6h 35m

Austrian Airlines

Wed 17/606:00

LHR

YOW

2 stops18h 46m

Austrian Airlines

Deal found 26/5£458

Mon 7/918:55

YOW

LHR

Nonstop6h 35m

Austrian Airlines

Wed 23/906:00

LHR

YOW

2 stops16h 10m

Austrian Airlines

Deal found 26/5£461

Thu 8/1018:55

YOW

LHR

Nonstop6h 35m

Austrian Airlines

Wed 14/1006:00

LHR

YOW

2 stops16h 10m

Austrian Airlines

Deal found 27/5£461

Wed 27/521:00

YOW

LHR

Nonstop6h 35m

Austrian Airlines

Fri 5/606:00

LHR

YOW

2 stops16h 11m

Austrian Airlines

Deal found 26/5£462

Thu 4/618:55

YOW

LHR

Nonstop6h 35m

Lufthansa

Wed 17/614:10

LHR

YOW

Nonstop7h 10m

Lufthansa

Deal found 26/5£466

Thu 4/617:30

YOW

LHR

1 stop22h 30m

Multiple Airlines

Wed 17/606:55

LHR

YOW

2 stops20h 16m

Multiple Airlines

Deal found 26/5£467

Tue 15/919:25

YOW

LHR

1 stop9h 35m

Air Canada

Fri 25/912:40

LHR

YOW

1 stop11h 00m

Air Canada

Deal found 27/5£467

Tue 2/614:40

YOW

LHR

1 stop10h 50m

Lufthansa

Wed 17/614:10

LHR

YOW

Nonstop7h 10m

Lufthansa

Deal found 27/5£468

Sat 26/915:10

YOW

LHR

1 stop10h 20m

Lufthansa

Sat 3/1014:10

LHR

YOW

Nonstop7h 55m

Lufthansa

Deal found 27/5£469

Wed 27/521:00

YOW

LHR

Nonstop6h 35m

Lufthansa

Fri 5/614:05

LHR

YOW

1 stop12h 06m

Lufthansa

Deal found 26/5£470

Fri 5/615:00

YOW

LHR

1 stop10h 30m

Lufthansa

Sat 13/612:40

LHR

YOW

2 stops14h 31m

Lufthansa

Deal found 27/5£471

Find flight deals from Ottawa to Heathrow

Round-trip from	£461
One-way from	£227
Popular in	December
Cheapest in	November
Average price	£610

Austrian Airlines
7/9-23/9
2 total stops
22h 45m total
Ottawa to London

Search Deals

7/6
3 total stops
41h 55m total
Ottawa to London

Search Deals

High demand for flights, 0% potential price rise

Search Deals

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

Search Deals

Average for round-trip flights in May 2026

Search Deals

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

Sat 5/9

15:10-10:40

2 stops14h 30m

London Heathrow

Sat 12/9

08:45-23:54

2 stops20h 09m

£508

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 11/9

12:00-07:15

2 stops14h 15m

London Heathrow

Sun 20/9

06:50-16:38

2 stops14h 48m

£519

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 12/6

15:10-10:40

2 stops14h 30m

London Heathrow

Thu 18/6

08:45-23:54

2 stops20h 09m

£566

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 15/6

17:25-10:45

2 stops12h 20m

London Heathrow

Mon 22/6

06:30-15:00

2 stops13h 30m

£570

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 13/9

17:10-10:45

2 stops12h 35m

London Heathrow

Sat 19/9

14:45-00:20

2 stops14h 35m

£575

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 22/6

17:25-10:45

2 stops12h 20m

London Heathrow

Wed 15/7

15:20-00:20

2 stops14h 00m

£576

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 10/9

18:25-13:50

2 stops14h 25m

London Heathrow

Mon 14/9

06:30-15:00

2 stops13h 30m

£578

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 21/6

17:25-10:45

2 stops12h 20m

London Heathrow

Sat 27/6

06:15-15:00

1 stop13h 45m

£633

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 8/6

09:10-07:55

2 stops17h 45m

London Heathrow

Thu 11/6

08:45-19:11

2 stops15h 26m

£633

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 8/7

06:00-05:55

2 stops18h 55m

London Heathrow

Wed 15/7

16:40-16:38

2 stops28h 58m

£654

Flights are sorted by cheapest return flights first.

Deals found on 27/5

Showing 1-10 of 22 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 44 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 £513). Flying from Ottawa to London Heathrow Airport in December is currently the most expensive (average of £746). 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

11,096 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Lori,May 2026

YYZ - YFC

Didn't land, sent back to Toronto. No food, no accommodation, no help at all!!

Air Canada

7.1

Good

11,096 reviews

Air Canada

7.1

Good

11,096 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Lori,May 2026

YYZ - YFC

Didn't land, sent back to Toronto. No food, no accommodation, no help at all!!

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 are 2 flights 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 £570, United Airlines can have you in London Heathrow Airport from Ottawa in 12h 20m. Ottawa and London Heathrow Airport are separated by a distance of 3320 mi. This flight may include one or multiple stops.
What is the cheapest airline to fly from Ottawa to London Heathrow Airport round-trip?
According to our current data, Air Canada (£481), offers the cheapest pricing from Ottawa to London Heathrow Airport. You may be able to fly from Ottawa to London Heathrow Airport for 19% 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 Croatia Airlines (100%), United Airlines (71%) or TAP AIR PORTUGAL (70%) 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 £513). Flying from Ottawa to London Heathrow Airport in December is currently the most expensive (average of £746). 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£481	Average£626	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.

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

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.

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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 £227

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 7/6. 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 29 May 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 29 May 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 29 May 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 29 May 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 29 May 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 29 May 2026.

Last-minute flights from Ottawa to HeathrowDiscover last-minute flight deals from Ottawa to Heathrow. Data last updated 29 May 2026 and is based on user searches.

Discover last-minute flight deals from Ottawa to Heathrow. Data last updated 29 May 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 29 May 2026.

Search for one-way flight options from Ottawa to Heathrow. Find affordable one-way fares based on user searches. Data last updated 29 May 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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Alternative routes for Ottawa to Heathrow

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Complete your trip

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Direct flights to England

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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 29 May 2026.

Ottawa and Heathrow flights

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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 29 May 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 29 May 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 29 May 2026.

Last-minute flights from Ottawa to Heathrow
Discover last-minute flight deals from Ottawa to Heathrow. Data last updated 29 May 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 29 May 2026.