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Cheap flights from Ottawa to London Heathrow Airport from £239

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 17/10. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
18 Jul — 25 Jul1
1 adult

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 Wednesday or Monday and return on a Thursday

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 13 July 2025.

Round-trip from

£532

One-way from

£239

Popular in

December

Cheapest in

February

Average price

£635

Good round-trip deal

£611 or less
Aer Lingus
  • Aer Lingus
  • 28/9-7/10
  • 4 total stops
  • 31h 24m total
  • Ottawa to London
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17/10
  • 17/10
  • 3 total stops
  • 58h 45m 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. 3% potential price decrease (£13 potential savings vs. average return price).
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Average for round-trip flights in July 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

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 13 July 2025.

Sun 28/911:55YOW - LHR
2 stops15h 05mAer Lingus
Tue 7/1009:50LHR - YOW
2 stops16h 19mAer Lingus
Deal found 12/7£532
Tue 26/817:50YOW - LHR
1 stop11h 20mUnited Airlines
Tue 2/906:50LHR - YOW
2 stops19h 45mUnited Airlines
Deal found 12/7£541
Tue 26/818:40YOW - LHR
1 stop10h 20mAir Canada
Tue 2/914:05LHR - YOW
1 stop23h 55mAir Canada
Deal found 12/7£543
Sun 7/911:50YOW - LHR
2 stops19h 50mMultiple Airlines
Sun 14/909:50LHR - YOW
2 stops15h 15mMultiple Airlines
Deal found 12/7£544
Wed 5/1117:20YOW - LHR
1 stop15h 25mVirgin Atlantic
Wed 19/1111:30LHR - YOW
1 stop32h 40mVirgin Atlantic
Deal found 12/7£551
Wed 27/821:00YOW - LHR
Nonstop6h 35mLufthansa
Wed 3/912:40LHR - YOW
Nonstop7h 20mLufthansa
Deal found 12/7£565
Thu 24/715:55YOW - LHR
2 stops24h 50mSWISS
Thu 28/806:00LHR - YOW
2 stops22h 08mSWISS
Deal found 10/7£574

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 13 July 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

Sun 28/9

11:55-08:00

2 stops15h 05m

London Heathrow

Tue 7/10

09:50-21:09

2 stops16h 19m

£532

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 26/8

14:48-05:55

1 stop10h 07m

London Heathrow

Tue 2/9

06:50-21:35

2 stops19h 45m

£541

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 26/8

18:40-10:00

1 stop10h 20m

London Heathrow

Tue 2/9

14:05-09:00

1 stop23h 55m

£543

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 7/9

11:50-12:40

2 stops19h 50m

London Heathrow

Sun 14/9

09:50-20:05

2 stops15h 15m

£544

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 5/11

17:20-13:45

1 stop15h 25m

London Heathrow

Wed 19/11

11:30-15:10

1 stop32h 40m

£551

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 27/8

21:00-08:35

Nonstop6h 35m

London Heathrow

Wed 3/9

12:40-15:00

Nonstop7h 20m

£565

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 24/7

15:55-21:45

2 stops24h 50m

London Heathrow

Thu 28/8

06:00-23:08

2 stops22h 08m

£574

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 17/10

05:55-21:40

3 stops58h 45m

£239

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 17/7

14:40-10:00

1 stop14h 20m

£253

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 21/7

18:30-10:00

1 stop10h 30m

£255

Flights are sorted by cheapest return flights first.

Deals found on 12/7

Showing 1-10 of 12 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 11 July 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, January is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of £112). Flying from Ottawa to London Heathrow Airport in August is currently the most expensive (average of £164). 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 13 July 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 afternoon could potentially save you up to 13% 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 13 July 2025.
Read reviews from past customers who have flown with Austrian Airlines, SWISS, andUnited Airlines 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.
Austrian Airlines
7.6
Good
813 reviews
Check prices

Crew

8.1

Overall

7.6

Entertainment

6.8

Food

6.8

Comfort

7.3

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Austrian Airlines
7.6
Good
813 reviews
Austrian Airlines
7.6
Good
813 reviews
Check prices

Crew

8.1

Overall

7.6

Entertainment

6.8

Food

6.8

Comfort

7.3

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
SWISS
7.5
Good
1,656 reviews
Austrian Airlines
7.6
Good
813 reviews
Check prices

Crew

8.1

Overall

7.6

Entertainment

6.8

Food

6.8

Comfort

7.3

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
United Airlines
7.4
Good
8,853 reviews
Austrian Airlines
7.6
Good
813 reviews
Check prices

Crew

8.1

Overall

7.6

Entertainment

6.8

Food

6.8

Comfort

7.3

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Air Canada
7.1
Good
9,708 reviews
Austrian Airlines
7.6
Good
813 reviews
Check prices

Crew

8.1

Overall

7.6

Entertainment

6.8

Food

6.8

Comfort

7.3

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Aer Lingus
7.1
Good
1,159 reviews
Austrian Airlines
7.6
Good
813 reviews
Check prices

Crew

8.1

Overall

7.6

Entertainment

6.8

Food

6.8

Comfort

7.3

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time

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 is 1 flight from Ottawa to London Heathrow per day from 1 airline.

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

    According to our current data, Aer Lingus (£532), United Airlines (£541), and Air Canada (£552) offers the cheapest pricing from Ottawa to London Heathrow Airport. You may be able to fly from Ottawa to London Heathrow Airport for 7% less than the average price by searching for these airlines.

  • 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 Air Canada (77%), Aegean Airlines (77%) or Austrian Airlines (77%) 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 £613, our data indicates the cheapest price to be £611. The most popular route (Ottawa - London Heathrow), is priced around £479.

  • 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, January is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of £112). Flying from Ottawa to London Heathrow Airport in August is currently the most expensive (average of £164). 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 Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Hounslow
Croydon
Milton Keynes
Deal
Northampton
Gatwick
Slough
Luton
Wembley
Crawley
Eastbourne
Ilford
Hayes
Ipswich
Folkestone
Southend-on-Sea
Watford
Winchester
Swindon
Maidstone

Browse thousands of different options on Cheapflights for your next trip

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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 13 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£477Average£598FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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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.

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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