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Cheap flights from Ottawa to London Heathrow Airport from £191

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 21/1. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
20 Jan — 27 Jan1
1 adult
1 adult, Economy, 0 bags

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

Cheap 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 21 December 2025.

Fri 26/1220:00YOW - LHR
1 stop30h 10mAir Canada
Sat 14/218:00LHR - YOW
1 stop24h 18mAir Canada
Deal found 20/12£586
Wed 31/1214:05YOW - LHR
1 stop16h 15mLufthansa
Wed 14/112:00LHR - YOW
Nonstop7h 30mLufthansa
Deal found 18/12£601
Wed 31/1221:55YOW - LHR
Nonstop6h 25mAir Canada
Thu 8/109:00LHR - YOW
1 stop30h 21mAir Canada
Deal found 21/12£608
Wed 31/1218:05YOW - LHR
1 stop12h 15mMultiple Airlines
Thu 8/109:00LHR - YOW
1 stop13h 43mMultiple Airlines
Deal found 21/12£608
Wed 31/1216:00YOW - LHR
1 stop10h 10mMultiple Airlines
Wed 14/109:00LHR - YOW
2 stops15h 18mMultiple Airlines
Deal found 18/12£685
Wed 31/1214:15YOW - LHR
2 stops13h 10mUnited Airlines
Thu 8/112:45LHR - YOW
2 stops16h 09mUnited Airlines
Deal found 21/12£691
Fri 26/1212:05YOW - LHR
2 stops17h 45mUnited Airlines
Sat 14/216:20LHR - YOW
2 stops23h 06mUnited Airlines
Deal found 20/12£748
Tue 23/1220:00YOW - LHR
2 stops43h 35mAir Canada
Tue 30/1213:25LHR - YOW
1 stop32h 25mAir Canada
Deal found 19/12£759
Tue 23/1217:09YOW - LHR
1 stop13h 06mUnited Airlines
Sun 28/1207:40LHR - YOW
1 stop14h 38mUnited Airlines
Deal found 18/12£760

Find 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 21 December 2025.

Round-trip from

£465

One-way from

£191

Popular in

December

Cheapest in

November

Average price

£754

Good round-trip deal

£483 or less
Virgin Atlantic
  • Virgin Atlantic
  • 3/2-10/2
  • 2 total stops
  • 23h 20m total
  • Ottawa to London
Search Deals
WestJet
  • WestJet
  • 21/1
  • 2 total stops
  • 26h 10m total
  • Ottawa to London
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£19 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Ottawa to London Heathrow.
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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 21 December 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

Sat 30/5

12:15-21:00

1 stop27h 45m

London Heathrow

Mon 15/6

19:10-20:51

2 stops30h 41m

£487

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 18/5

17:30-21:00

1 stop22h 30m

London Heathrow

Fri 29/5

12:40-22:11

2 stops14h 31m

£487

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 18/1

17:35-13:45

1 stop15h 10m

London Heathrow

Sun 25/1

06:20-15:10

1 stop13h 50m

£494

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 23/2

17:20-10:30

1 stop12h 10m

London Heathrow

Mon 2/3

08:55-15:10

1 stop11h 15m

£494

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 16/2

17:20-08:00

1 stop9h 40m

London Heathrow

Fri 20/2

06:20-15:10

1 stop13h 50m

£495

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 11/1

17:45-18:20

1 stop19h 35m

London Heathrow

Wed 21/1

06:20-15:10

1 stop13h 50m

£495

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 16/2

17:20-13:45

1 stop15h 25m

London Heathrow

Tue 24/2

08:55-15:10

1 stop11h 15m

£495

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 25/1

17:20-18:20

1 stop20h 00m

London Heathrow

Sun 8/2

06:20-15:10

1 stop13h 50m

£495

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 8/2

17:20-07:55

1 stop9h 35m

London Heathrow

Wed 11/2

19:25-15:10

1 stop24h 45m

£504

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 12/4

17:10-08:00

1 stop9h 50m

London Heathrow

Mon 20/4

09:00-15:00

1 stop11h 00m

£507

Flights are sorted by cheapest return flights first.

Deals found on 19/12

Showing 1-10 of 16 results
1
2

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 19 December 2025.

Booking 68 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 £334). Flying from Ottawa to London Heathrow Airport in July is currently the most expensive (average of £502). 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 21 December 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.

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 21 December 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
10,549 reviews
Check prices

Boarding

7.3

Crew

7.8

Comfort

7.1

Overall

7.1

Food

6.3

Entertainment

6.8

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
10,549 reviews
Air Canada
7.1
Good
10,549 reviews
Check prices

Boarding

7.3

Crew

7.8

Comfort

7.1

Overall

7.1

Food

6.3

Entertainment

6.8

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 0 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 £494, Air Canada can have you in London Heathrow Airport from Ottawa in 15h 10m. 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 (£453), offers the cheapest pricing from Ottawa to London Heathrow Airport. You may be able to fly from Ottawa to London Heathrow Airport for 20% 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 (68%), Air Canada (50%) or Aegean Airlines (50%) 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 £493, our data indicates the cheapest price to be £483. The most popular route (Ottawa - London Heathrow), is priced around £472.

  • 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 £334). Flying from Ottawa to London Heathrow Airport in July is currently the most expensive (average of £502). 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
Croydon
Slough
Hounslow
Northampton
Luton
Gatwick
Wembley
Ilford
Brentford
Colchester
Hayes
Watford
Crawley
Swindon
Winchester
Bedford
Romford
Chichester
Eastbourne

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 21 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£453Average£615FlexibilityNo 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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