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Heathrow

$288+ Cheap flights from Ottawa (YOW) to Heathrow (LHR)

YOW — LHR
Oct 23 — Oct 301
Fri 10/23
Fri 10/30
1 adult, Economy
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Find cheap flights from Ottawa to Heathrow with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Ottawa to London Heathrow are usually found in September or January, booked 54 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from Ottawa to Heathrow

Cheapest flights from Ottawa to Heathrow

Wed 9/309:00 pm -
Nonstop6h 35m
Wed 10/72:10 pm -
Nonstop7h 55m
Deal found 9/23$638
Mon 9/286:55 pm -
Nonstop6h 35m
Wed 10/142:10 pm -
Nonstop7h 55m
Deal found 9/20$640
Fri 10/162:50 pm -
1 stop10h 40m
Thu 10/229:30 am -
Nonstop7h 55m
Deal found 9/19$643
Fri 10/1611:15 am -
1 stop14h 15m
Wed 10/212:10 pm -
Nonstop7h 55m
Deal found 9/22$644
Mon 9/284:00 pm -
1 stop11h 35m
Mon 10/59:30 am -
Nonstop7h 55m
Deal found 9/23$646
Mon 10/127:30 pm -
1 stop9h 30m
Fri 10/169:30 am -
1 stop9h 28m
Deal found 9/19$647
Mon 9/2812:00 pm -
1 stop13h 35m
Mon 10/59:30 am -
Nonstop7h 55m
Deal found 9/21$648
Mon 10/54:00 pm -
1 stop11h 35m
Wed 10/142:05 pm -
1 stop11h 45m
Deal found 9/23$649
Mon 9/282:00 pm -
1 stop11h 35m
Fri 10/169:30 am -
1 stop9h 28m
Deal found 9/20$652

Find flight deals from Ottawa to Heathrow

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$638
(Lufthansa)

One-way from

$288
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$694

Good round-trip deal

$878 or less

Good one-way deal

$677 or less
Provider with most accurate pricing for Ottawa-London Heathrow flight deals.
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Provider most trusted by Cheapflights users for Ottawa-London Heathrow flights.
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From Ottawa to London Heathrow
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One-way flight from Ottawa to London Heathrow
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Highest demand for flights based on searches. 1% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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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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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 round-trip

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Fri 10/16

10:00 am-8:05 am

2 stops17h 05m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$408

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Sat 10/10

2:00 pm-10:20 am

2 stops15h 20m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$416

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Fri 10/16

6:15 pm-12:05 pm

2 stops36h 50m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$417
Quickest round-trip

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Fri 11/6

2:00 pm-8:05 am

2 stops13h 05m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$462

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Fri 10/2

12:25 pm-12:05 pm

2 stops42h 40m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$486

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Fri 10/30

3:15 pm-11:25 am

2 stops16h 10m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$492

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Fri 10/9

6:15 pm-12:05 pm

2 stops36h 50m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$499

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Mon 9/28

4:00 pm-10:15 am

1 stop13h 15m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$512

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Tue 9/29

7:00 am-6:15 am

1 stop18h 15m

London Heathrow

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$512

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Sat 10/10

9:00 pm-8:35 am

Nonstop6h 35m

London Heathrow

Fri 10/16

9:30 am-1:58 pm

1 stop9h 28m

$643

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/21

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Compare providers for flights from Ottawa to Heathrow

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ottawa to Heathrow in September.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ottawa-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ottawa-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ottawa-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ottawa-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ottawa-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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?

Booking 53 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, September is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of $694). Flying from Ottawa to London Heathrow Airport in December is currently the most expensive (average of $1,058). 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 to fly round-trip 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 $664 and $838 in October.
The cheapest round-trip price found within the last 5 days was $638 on Lufthansa (Oct 5-Oct 14).

Reviews of airlines servicing Heathrow

See what other customers who have flown with Air Canada and Lufthansa from Ottawa to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
11,668 reviews

Overall

7.1

Boarding

7.3

Crew

7.8

Entertainment

6.8

Comfort

7.1

Food

6.3

Reviews

1 / 20
2.0
Mediocre

Sylvia,Aug 2026

YYZ - PHL

Our flight from Kelowna was 5 hours delayed. We missed our connection. We were able to get to a hotel by 3:00 a.m. but the breakfast cost us $40. The hotel was good. We were rescheduled for the flight the next night when it was canceled. There were no hotel vouchers available which didn't matter because there were no hotel rooms available. We decided to just drive which was not easy doing a one-way rental to the United States. Worst possible trip I've ever had
Air Canada
7.1
Good
11,668 reviews
Air Canada
7.1
Good
11,668 reviews

Overall

7.1

Boarding

7.3

Crew

7.8

Entertainment

6.8

Comfort

7.1

Food

6.3

Reviews

1 / 20
2.0
Mediocre

Sylvia,Aug 2026

YYZ - PHL

Our flight from Kelowna was 5 hours delayed. We missed our connection. We were able to get to a hotel by 3:00 a.m. but the breakfast cost us $40. The hotel was good. We were rescheduled for the flight the next night when it was canceled. There were no hotel vouchers available which didn't matter because there were no hotel rooms available. We decided to just drive which was not easy doing a one-way rental to the United States. Worst possible trip I've ever had
Lufthansa
6.8
Okay
8,238 reviews
Air Canada
7.1
Good
11,668 reviews

Overall

7.1

Boarding

7.3

Crew

7.8

Entertainment

6.8

Comfort

7.1

Food

6.3

Reviews

1 / 20
2.0
Mediocre

Sylvia,Aug 2026

YYZ - PHL

Our flight from Kelowna was 5 hours delayed. We missed our connection. We were able to get to a hotel by 3:00 a.m. but the breakfast cost us $40. The hotel was good. We were rescheduled for the flight the next night when it was canceled. There were no hotel vouchers available which didn't matter because there were no hotel rooms available. We decided to just drive which was not easy doing a one-way rental to the United States. Worst possible trip I've ever had

Related info for your journey

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

    Ottawa (YOW) is the airport you will fly out of if you book a flight from Ottawa to London Heathrow. You should not have trouble finding flights to London Heathrow from Ottawa; the airport handles an average of 1 outbound flight to London Heathrow per day. You should also have plenty of airline options to choose from since 2 airlines have flights from the Ottawa airport to London Heathrow. It is only a 6.6 mi journey to Ottawa (YOW) from Ottawa’s city center.

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

    Lufthansa and United Airlines can get you from Ottawa to London Heathrow Airport in just under 6h 35m. Your travel time can differ by up to 13h 05m. The distance between Ottawa and London Heathrow Airport is about 3320 mi. This flight may include one or multiple stops.

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

    According to our current data, Air Canada ($642), and Lufthansa ($650) offers the cheapest pricing from Ottawa to London Heathrow Airport. You may be able to fly from Ottawa to London Heathrow Airport for 21% less than the average price by searching for these airlines.

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

    Consider Air Canada (41%), Aegean Airlines (41%) or Austrian Airlines (41%) when booking your flight. These represent the most reliable airlines when flying from Ottawa to London Heathrow Airport.

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

    The cheapest flight price from Ottawa to London Heathrow Airport is $651. On average you can expect to pay $1,758. The most popular route, (Ottawa - London Heathrow), can usually be booked for $647.

  • 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, September is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of $694). Flying from Ottawa to London Heathrow Airport in December is currently the most expensive (average of $1,058). 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

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Dorking
Gatwick
Hounslow
Harrow
Wembley
Southend-on-Sea
Basingstoke
Watford
Northampton
Dartford
Winchester
Croydon
Chipping Norton
Kingston upon Thames
Eastbourne
Slough
Stansted
Sutton
Luton

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Ottawa to Heathrow

Pearson Intl to Heathrow flights
Pierre Elliott Trudeau Intl to Heathrow flights

Top 2 airlines flying from Ottawa to Heathrow

AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$642Average$820FlexibilityNo cancel feeOn-time67%
LufthansaCheapest$650Average$843FlexibilityNo cancel feeOn-time76%

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