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Cheap flights from Ottawa to London Heathrow Airport from £250

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 25/3. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
26 Feb — 5 Mar1
1 adult

The best prices from Ottawa to London Heathrow are usually found in January or February, booked 54 days in advance, depart on a Wednesday 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 21 February 2025.

Round-trip from

£486

One-way from

£250

Popular in

December

Cheapest in

January

Average price

£561

Good round-trip deal

£559 or less
Air France
  • Air France
  • 20/3-24/3
  • 2 total stops
  • 40h 00m total
  • Ottawa to London
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WestJet
  • WestJet
  • 25/3
  • 1 total stop
  • 26h 35m total
  • Ottawa to London
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Highest demand for flights based on searches. 1% potential increase in price (£9 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£13 potential savings vs. average return price).
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Average for round-trip flights in February 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 21 February 2025.

Thu 20/318:20YOW - LHR
1 stop15h 25mAir France
Mon 24/319:35LHR - YOW
1 stop24h 35mAir France
Deal found 20/2£486
Sun 16/318:20YOW - LHR
2 stops12h 25mMultiple Airlines
Mon 24/319:35LHR - YOW
1 stop24h 35mMultiple Airlines
Deal found 20/2£503
Thu 27/217:50YOW - LHR
1 stop10h 20mUnited Airlines
Tue 4/306:50LHR - YOW
2 stops19h 34mUnited Airlines
Deal found 20/2£543
Sun 6/417:35YOW - LHR
1 stop22h 25mAir Canada
Sun 13/409:30LHR - YOW
1 stop10h 37mAir Canada
Deal found 20/2£545
Sat 4/1021:00YOW - LHR
Nonstop6h 35mLufthansa
Mon 13/1014:05LHR - YOW
Nonstop7h 20mLufthansa
Deal found 19/2£568
Sat 22/306:15YOW - LHR
1 stop26h 35mWestJet
Mon 24/314:50LHR - YOW
2 stops33h 57mWestJet
Deal found 20/2£635
Sun 16/314:10YOW - LHR
2 stops38h 10mAustrian Airlines
Sat 22/312:05LHR - YOW
2 stops35h 17mAustrian Airlines
Deal found 20/2£659
Fri 23/516:00YOW - LHR
2 stops23h 55mBrussels Airlines
Mon 9/611:05LHR - YOW
2 stops32h 59mBrussels Airlines
Deal found 21/2£669
Sat 4/1017:15YOW - LHR
2 stops12h 30mKLM
Fri 17/1014:45LHR - YOW
2 stops14h 37mKLM
Deal found 19/2£715
Fri 20/610:00YOW - LHR
2 stops18h 05mAer Lingus
Sat 28/607:40LHR - YOW
2 stops18h 30mAer Lingus
Deal found 21/2£754
Sun 2/305:55YOW - LHR
2 stops43h 55mDelta
Mon 10/315:50LHR - YOW
2 stops36h 19mDelta
Deal found 19/2£771

Find flights from Ottawa to Heathrow within your budget

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 February 2025.

Fly from

Ottawa

Fly to

Heathrow

Route

Depart

Return

Price

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 20/3

18:20-13:45

1 stop15h 25m

London Heathrow

Mon 24/3

19:35-16:10

1 stop24h 35m

£486

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 16/3

18:20-10:45

2 stops12h 25m

London Heathrow

Mon 24/3

19:35-16:10

1 stop24h 35m

£503

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 6/4

17:35-21:00

1 stop22h 25m

London Heathrow

Sun 13/4

09:30-15:07

1 stop10h 37m

£545

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 16/3

19:30-06:40

1 stop31h 10m

London Heathrow

Sat 22/3

08:00-16:16

1 stop12h 16m

£551

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 16/4

21:00-08:35

Nonstop6h 35m

London Heathrow

Wed 23/4

12:40-15:00

Nonstop7h 20m

£569

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 22/3

06:15-12:50

1 stop26h 35m

London Heathrow

Mon 24/3

14:50-20:47

2 stops33h 57m

£635

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 16/3

14:10-08:20

2 stops38h 10m

London Heathrow

Sat 22/3

12:05-19:22

2 stops35h 17m

£659

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 23/5

16:00-20:55

2 stops23h 55m

London Heathrow

Mon 9/6

11:05-15:04

2 stops32h 59m

£669

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 20/6

10:00-09:05

2 stops18h 05m

London Heathrow

Sat 28/6

07:40-21:10

2 stops18h 30m

£754

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 9/3

11:00-08:15

2 stops41h 15m

London Heathrow

Fri 21/3

08:55-17:27

2 stops36h 32m

£806

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Showing 1-10 of 17 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.

Travel insights for flights from Ottawa to Heathrow

Get recent, data-driven insights about flights from Ottawa to Heathrow including ideal travel times, pricing trends, and more.

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 February 2025.

Booking 54 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 £163). 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 February 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 11% 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 21 February 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
1,333 reviews
Check prices

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Food

7.3

Overall

7.8

Crew

8.4

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

KLM
7.8
Good
1,333 reviews
KLM
7.8
Good
1,333 reviews
Check prices

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Food

7.3

Overall

7.8

Crew

8.4

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Austrian Airlines
7.6
Good
773 reviews
KLM
7.8
Good
1,333 reviews
Check prices

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Food

7.3

Overall

7.8

Crew

8.4

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

SWISS
7.5
Good
1,568 reviews
KLM
7.8
Good
1,333 reviews
Check prices

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Food

7.3

Overall

7.8

Crew

8.4

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Virgin Atlantic
7.5
Good
654 reviews
KLM
7.8
Good
1,333 reviews
Check prices

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Food

7.3

Overall

7.8

Crew

8.4

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Air France
7.4
Good
1,449 reviews
KLM
7.8
Good
1,333 reviews
Check prices

Comfort

7.7

Boarding

7.8

Entertainment

7.2

Food

7.3

Overall

7.8

Crew

8.4

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

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 France (£486), Air Canada (£545), and United Airlines (£551) offers the cheapest pricing from Ottawa to London Heathrow Airport. You may be able to fly from Ottawa to London Heathrow Airport for 24% 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?

    £250 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and Lufthansa, with prices starting from £549 and £554, respectively.

  • 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 £591, our data indicates the cheapest price to be £559. The most popular route (Ottawa - London Heathrow), is priced around £503.

  • 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 £163). 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?

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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 21 February 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£555Average£640FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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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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