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Cheap flights from Ottawa to London Heathrow Airport from £262

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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
25 Mar — 1 Apr1
1 adult

Cheapflights Tip: The best prices from Ottawa to London Heathrow are usually found in February or January, booked 9 days in advance, depart on a Tuesday or Monday 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 20 March 2025.

Round-trip from

£507

One-way from

£263

Popular in

December

Cheapest in

February

Average price

£561
Lufthansa
  • Lufthansa
  • 14/5-19/5
  • 3 total stops
  • 21h 59m total
  • Ottawa to London
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2/4
  • 2/4
  • 2 total stops
  • 21h 05m total
  • Ottawa to London
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£13 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 March 2025
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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 20 March 2025.

Tue 13/518:40YOW - LHR
1 stop10h 20mLufthansa
Thu 12/609:30LHR - YOW
1 stop14h 30mLufthansa
Deal found 20/3£502
Wed 14/519:00YOW - LHR
2 stops10h 00mMultiple Airlines
Mon 19/512:05LHR - YOW
1 stop11h 59mMultiple Airlines
Deal found 19/3£507
Mon 28/407:15YOW - LHR
1 stop8h 45mAir Canada
Thu 8/509:30LHR - YOW
1 stop9h 15mAir Canada
Deal found 19/3£508
Tue 6/514:30YOW - LHR
2 stops23h 00mSWISS
Tue 20/517:10LHR - YOW
2 stops52h 54mSWISS
Deal found 19/3£517
Thu 12/617:15YOW - LHR
1 stop12h 15mVirgin Atlantic
Wed 25/609:00LHR - YOW
1 stop11h 05mVirgin Atlantic
Deal found 19/3£520
Wed 15/1019:55YOW - LHR
2 stops44h 45mAustrian Airlines
Fri 31/1019:25LHR - YOW
2 stops27h 52mAustrian Airlines
Deal found 19/3£521
Sat 5/409:50YOW - LHR
2 stops16h 25mUnited Airlines
Fri 18/408:30LHR - YOW
1 stop18h 05mUnited Airlines
Deal found 19/3£542
Sun 1/617:15YOW - LHR
2 stops12h 30mKLM
Sun 15/606:30LHR - YOW
2 stops13h 35mKLM
Deal found 19/3£600
Thu 20/318:20YOW - LHR
1 stop18h 15mAir France
Mon 24/319:35LHR - YOW
1 stop24h 35mAir France
Deal found 19/3£626
Mon 28/713:55YOW - LHR
2 stops13h 05mAer Lingus
Tue 19/808:50LHR - YOW
2 stops17h 20mAer Lingus
Deal found 19/3£654

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 20 March 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

Tue 13/5

18:40-10:00

1 stop10h 20m

London Heathrow

Thu 12/6

09:30-19:00

1 stop14h 30m

£502

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 14/5

19:00-10:00

2 stops10h 00m

London Heathrow

Mon 19/5

12:05-19:04

1 stop11h 59m

£507

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 28/4

07:15-21:00

1 stop8h 45m

London Heathrow

Thu 8/5

09:30-13:45

1 stop9h 15m

£508

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 6/5

14:30-18:30

2 stops23h 00m

London Heathrow

Tue 20/5

17:10-17:04

2 stops52h 54m

£517

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 12/6

17:15-10:30

1 stop12h 15m

London Heathrow

Wed 25/6

09:00-15:05

1 stop11h 05m

£520

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 5/4

09:50-07:15

2 stops16h 25m

London Heathrow

Fri 18/4

08:30-21:35

1 stop18h 05m

£542

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 10/9

19:55-11:50

1 stop10h 55m

London Heathrow

Fri 19/9

06:00-00:19

2 stops23h 19m

£552

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 1/6

17:15-10:45

2 stops12h 30m

London Heathrow

Sun 15/6

06:30-15:05

2 stops13h 35m

£600

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 28/7

13:55-08:00

2 stops13h 05m

London Heathrow

Tue 19/8

08:50-21:10

2 stops17h 20m

£654

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 5/5

06:15-12:05

2 stops48h 50m

London Heathrow

Mon 19/5

13:55-05:30

2 stops44h 35m

£782

Flights are sorted by cheapest return flights first.

Deals found on 20/3

Showing 1-10 of 15 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 14 March 2025.

Booking 9 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 20 March 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 16% on airfare.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

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.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

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).

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 20 March 2025.
See what other customers who have flown with KLM, Austrian Airlines and SWISS from Ottawa to London have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,319 reviews
Check prices

Entertainment

7.2

Overall

7.8

Food

7.3

Comfort

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
KLM
7.8
Good
1,319 reviews
KLM
7.8
Good
1,319 reviews
Check prices

Entertainment

7.2

Overall

7.8

Food

7.3

Comfort

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Austrian Airlines
7.6
Good
768 reviews
KLM
7.8
Good
1,319 reviews
Check prices

Entertainment

7.2

Overall

7.8

Food

7.3

Comfort

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
SWISS
7.5
Good
1,567 reviews
KLM
7.8
Good
1,319 reviews
Check prices

Entertainment

7.2

Overall

7.8

Food

7.3

Comfort

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
United Airlines
7.4
Good
8,609 reviews
KLM
7.8
Good
1,319 reviews
Check prices

Entertainment

7.2

Overall

7.8

Food

7.3

Comfort

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Virgin Atlantic
7.4
Good
634 reviews
KLM
7.8
Good
1,319 reviews
Check prices

Entertainment

7.2

Overall

7.8

Food

7.3

Comfort

7.7

Crew

8.4

Boarding

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

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.

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

    According to our current data, Air Canada (£508), Lufthansa (£512), and SWISS (£517) offers the cheapest pricing from Ottawa to London Heathrow Airport. You may be able to fly from Ottawa to London Heathrow Airport for 18% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Ottawa to London Heathrow Airport one-way?

    £323 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Lufthansa and Air Canada, with prices starting from £535 and £572, respectively.

  • 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
Deal
Milton Keynes
Gatwick
Croydon
Slough
Luton
Eastbourne
Northampton
Ilford
Swindon
Hayes
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Southend-on-Sea
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Maidstone
Winchester
Ipswich
Watford
Southall

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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 20 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£496Average£632FlexibilityNo 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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