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Cheap flights from Ottawa to London Heathrow Airport from £186

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 26/1. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
26 Dec — 2 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Ottawa to London Heathrow are usually found in February or January, booked 20 days in advance, depart on a Monday or Tuesday 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 26 November 2025.

Round-trip from

£491

One-way from

£186

Popular in

December

Cheapest in

February

Average price

£558

Good round-trip deal

£502 or less
SWISS
  • SWISS
  • 2/2-9/2
  • 3 total stops
  • 41h 57m total
  • Ottawa to London
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WestJet
  • WestJet
  • 26/1
  • 2 total stops
  • 36h 35m total
  • Ottawa to London
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£29 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£14 potential savings vs. average return price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Ottawa to London Heathrow.
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Find flight deals from Ottawa to Heathrow

Enter your travel dates to find the best prices.

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 26 November 2025.

Wed 3/1221:55YOW - LHR
Nonstop6h 25mMultiple Airlines
Wed 10/1206:35LHR - YOW
2 stops17h 03mMultiple Airlines
Deal found 25/11£487
Tue 2/1216:00YOW - LHR
1 stop10h 10mLufthansa
Tue 9/1206:35LHR - YOW
2 stops17h 03mLufthansa
Deal found 25/11£488
Mon 1/1210:30YOW - LHR
2 stops15h 40mMultiple Airlines
Thu 4/1220:15LHR - YOW
2 stops27h 23mMultiple Airlines
Deal found 24/11£490
Mon 1/1216:00YOW - LHR
1 stop10h 10mMultiple Airlines
Fri 5/1209:00LHR - YOW
2 stops15h 18mMultiple Airlines
Deal found 24/11£491
Fri 28/1112:15YOW - LHR
1 stop27h 20mMultiple Airlines
Wed 3/1209:00LHR - YOW
2 stops15h 18mMultiple Airlines
Deal found 25/11£492
Sat 29/1120:00YOW - LHR
2 stops19h 35mMultiple Airlines
Sat 6/1206:00LHR - YOW
2 stops16h 18mMultiple Airlines
Deal found 24/11£494
Thu 27/1114:50YOW - LHR
1 stop11h 20mMultiple Airlines
Wed 10/1206:35LHR - YOW
2 stops17h 03mMultiple Airlines
Deal found 25/11£495
Wed 26/1121:55YOW - LHR
Nonstop6h 25mAir Canada
Fri 5/1209:00LHR - YOW
1 stop10h 21mAir Canada
Deal found 25/11£495
Wed 26/1110:30YOW - LHR
2 stops15h 40mMultiple Airlines
Wed 3/1211:10LHR - YOW
1 stop11h 08mMultiple Airlines
Deal found 25/11£499

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 26 November 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

Fri 24/4

17:15-10:30

1 stop12h 15m

London Heathrow

Sun 17/5

06:15-15:05

1 stop13h 50m

£497

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 23/2

13:55-07:10

2 stops12h 15m

London Heathrow

Wed 11/3

13:25-22:18

1 stop12h 53m

£500

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 25/2

14:50-07:10

1 stop11h 20m

London Heathrow

Tue 10/3

13:25-19:15

1 stop9h 50m

£514

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 25/2

10:50-07:10

1 stop15h 20m

London Heathrow

Tue 3/3

09:00-14:21

1 stop10h 21m

£514

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 18/1

17:35-13:50

2 stops15h 15m

London Heathrow

Thu 22/1

11:45-00:42

2 stops17h 57m

£516

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 25/2

10:50-07:10

1 stop15h 20m

London Heathrow

Tue 3/3

06:00-17:18

2 stops16h 18m

£520

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 25/2

14:50-07:10

1 stop11h 20m

London Heathrow

Thu 12/3

13:25-19:15

1 stop9h 50m

£527

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 27/2

17:20-08:00

1 stop9h 40m

London Heathrow

Tue 3/3

06:30-15:10

2 stops13h 40m

£533

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 21/4

10:00-06:55

1 stop15h 55m

London Heathrow

Wed 27/5

10:50-09:47

2 stops27h 57m

£546

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 10/1

17:11-05:55

1 stop31h 44m

London Heathrow

Sat 17/1

16:20-23:54

1 stop12h 34m

£568

Flights are sorted by cheapest return flights first.

Deals found on 24/11

Showing 1-10 of 21 results
1
2
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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 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

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 return flight from Ottawa to Heathrow. Price data was last updated on 21 November 2025.

Booking 20 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 £358). Flying from Ottawa to London Heathrow Airport in July is currently the most expensive (average of £511). 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 26 November 2025.

One of the essential ways to save on airfare from Ottawa to London Heathrow Airport is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the evening could potentially save you up to 9% on airfare.

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

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 26 November 2025.
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
10,476 reviews
Check prices

Overall

7.1

Boarding

7.3

Crew

7.8

Entertainment

6.8

Food

6.3

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

YYZ - LAS

It's was great and the crew are very nice, captain has a smooth land on the runway 👍
Air Canada
7.1
Good
10,476 reviews
Air Canada
7.1
Good
10,476 reviews
Check prices

Overall

7.1

Boarding

7.3

Crew

7.8

Entertainment

6.8

Food

6.3

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

YYZ - LAS

It's was great and the crew are very nice, captain has a smooth land on the runway 👍

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?

    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 £514, Air France can have you in London Heathrow Airport from Ottawa in 11h 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 (£461), 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 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 Aegean Airlines (73%), Air Canada (68%) or Austrian Airlines (68%) as they are the most reliable in getting you off to your destination on time.

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

    Looking for the cheapest flight from Ottawa to London Heathrow Airport? While on average our users pay £624, our data indicates the cheapest price to be £491. The most popular route (Ottawa - London Heathrow), is priced around £427.

  • 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 £358). Flying from Ottawa to London Heathrow Airport in July is currently the most expensive (average of £511). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Slough
Croydon
Hounslow
Northampton
Gatwick
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Brentford
Winchester
Swindon
Crawley
Romford
Chichester
Bedford

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Ottawa to Heathrow

Discover the top airline 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 858,174 searches. Data last updated 26 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£461Average£626FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers 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?

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.

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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