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

Cheapflights users have booked flights from Ottawa to London Heathrow Airport round-trip from C$ 934. Other airlines that can offer you cheap pricing are Air Canada, from C$ 944, and SWISS, from C$ 959. Lufthansa is 19% cheaper than the average price of flights available within the next 90 days to this destination.

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

The cheapest airlines for a one-way flight from Ottawa to London Heathrow Airport are WestJet (C$ 594), Aer Lingus (C$ 909), and Air Canada (C$ 942).

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

On average you can expect to pay C$ 1,063 for a flight from Ottawa to London Heathrow Airport. The cheapest flight overall is C$ 936 while the most popular route, (Ottawa - London Heathrow) is currently priced at C$ 871.

What are the most popular airlines that fly from Ottawa to London Heathrow Airport?

When booking a flight from Ottawa to London Heathrow Airport, you may want to consider flying on Air Canada, Air France or Lufthansa as they are the most popular for this route.

Where are the most common layover locations when flying from Ottawa to London Heathrow Airport?

Most of the time, Ottawa to London Heathrow Airport flights that have layovers will stop in Montreal.

Where are the least popular layover locations for Ottawa to London Heathrow Airport flights?

Flights departing from Ottawa and landing in London Heathrow Airport layover in Toronto least frequently.

What are some popular things to do or see while on a layover in Montreal?

The majority of Montreal visitors spend their time at Centre Bell, Vieux-Port de Montréal, and Notre-Dame Basilica. Travelers on a layover in Montreal can visit Centre Bell, Vieux-Port de Montréal, and Notre-Dame Basilica, by traveling 14.6 km, 16.2 km, and 15.9 km, respectively after landing at Montreal Pierre Elliott Trudeau Intl. Those looking to explore during their layover in Montreal can rent a car from Montreal Pierre Elliott Trudeau Intl for about C$ 66 per day.

What is the cheapest day to fly round-trip from Ottawa to London Heathrow Airport?

Friday is generally a great day to depart. Flying on this day could help you save up to 4%.

How far in advance should I book a flight from Ottawa to London Heathrow Airport?

Find a great deal and save up to 23% by booking at least 36 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Ottawa to London Heathrow Airport within the next two weeks, with the cheapest ticket starting at C$ 1,018.

What is the cheapest month to fly from Ottawa to London Heathrow Airport?

February is one of the best times of the year to fly to London Heathrow Airport from Ottawa. Prices for February average C$ 1,116 per person but you can even find prices for as low as C$ 823. The most expensive prices can be found in the month of December. Opting for a February flight can save you 21% on your journey compared to booking in December

What airport do you fly from for flights from Ottawa to London Heathrow?

Most people fly from Ottawa (YOW) if they book a flight from Ottawa to London Heathrow. On average, Ottawa has 0 outbound flights to London Heathrow per day from 4 airlines. Ottawa is conveniently located just 10.6 km from Ottawa’s city centre.

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 vacation 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.

C$ 485+ Flights from Ottawa to London Heathrow Airport

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 Saturday or Sunday and return on a Monday

Cheap flight deals from Ottawa to Heathrow

Round-trip from	C$ 934
One-way from	C$ 485
Popular in	December
Cheapest in	February
Average price	C$ 1,042
Good round-trip deal	C$ 1,021 or less
Good one-way deal	C$ 1,010 or less

Lufthansa
13/5-12/6
1 total stop
17h 50m total
Ottawa to London

Search Deals

13/5
2 total stops
17h 05m total
Ottawa to London

Search Deals

Highest demand for flights based on searches. 2% potential increase in price (C$ 43 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 42 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 2025

Search Deals

Price to beat on a round-trip flight from Ottawa to London Heathrow.

Search Deals

Price to beat on a one-way flight from Ottawa to London Heathrow.

Search Deals

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.

Wed 26/37:15 a.m.YOW - LHR

1 stop9h 20mMultiple Airlines

Thu 3/42:05 p.m.LHR - YOW

Nonstop7h 30mMultiple Airlines

Deal found 20/3C$ 934

Thu 25/96:05 p.m.YOW - LHR

1 stop12h 45mLufthansa

Wed 15/109:30 a.m.LHR - YOW

1 stop9h 15mLufthansa

Deal found 19/3C$ 941

Mon 28/47:15 a.m.YOW - LHR

1 stop8h 45mAir Canada

Thu 8/59:30 a.m.LHR - YOW

1 stop9h 15mAir Canada

Deal found 19/3C$ 944

Tue 13/51:55 p.m.YOW - LHR

2 stops18h 05mSWISS

Thu 12/65:10 p.m.LHR - YOW

2 stops52h 54mSWISS

Deal found 20/3C$ 951

Wed 15/107:55 p.m.YOW - LHR

2 stops44h 45mAustrian Airlines

Fri 31/107:25 p.m.LHR - YOW

2 stops27h 52mAustrian Airlines

Deal found 19/3C$ 969

Thu 1/56:30 a.m.YOW - LHR

2 stops19h 15mUnited Airlines

Thu 8/57:25 a.m.LHR - YOW

2 stops21h 28mUnited Airlines

Deal found 20/3C$ 994

Sun 1/65:15 p.m.YOW - LHR

2 stops12h 30mKLM

Sun 15/66:30 a.m.LHR - YOW

2 stops13h 35mKLM

Deal found 19/3C$ 1,115

Thu 20/36:20 p.m.YOW - LHR

1 stop18h 15mAir France

Mon 24/37:35 p.m.LHR - YOW

1 stop24h 35mAir France

Deal found 19/3C$ 1,164

Mon 28/71:55 p.m.YOW - LHR

2 stops13h 05mAer Lingus

Tue 19/88:50 a.m.LHR - YOW

2 stops17h 20mAer Lingus

Deal found 19/3C$ 1,216

Best flights from Ottawa to Heathrow
Discover carefully curated flight deals from Ottawa to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 20 March 2025.

Tue 13/56:40 p.m.YOW - LHR

1 stop10h 20mLufthansa

Thu 12/62:05 p.m.LHR - YOW

Nonstop7h 30mLufthansa

Deal found 20/3C$ 934

Wed 14/57:00 p.m.YOW - LHR

2 stops10h 00mMultiple Airlines

Mon 19/512:05 p.m.LHR - YOW

1 stop11h 59mMultiple Airlines

Deal found 19/3C$ 942

Mon 28/47:15 a.m.YOW - LHR

1 stop8h 45mAir Canada

Thu 8/59:30 a.m.LHR - YOW

1 stop9h 15mAir Canada

Deal found 19/3C$ 944

Sun 1/611:05 a.m.YOW - LHR

2 stops29h 25mSWISS

Tue 10/66:00 a.m.LHR - YOW

2 stops20h 09mSWISS

Deal found 20/3C$ 959

Sat 5/49:50 a.m.YOW - LHR

2 stops16h 25mUnited Airlines

Fri 18/48:30 a.m.LHR - YOW

1 stop18h 05mUnited Airlines

Deal found 19/3C$ 1,008

Wed 10/97:55 p.m.YOW - LHR

1 stop10h 55mAustrian Airlines

Fri 19/96:00 a.m.LHR - YOW

2 stops23h 19mAustrian Airlines

Deal found 19/3C$ 1,027

Sun 1/65:15 p.m.YOW - LHR

2 stops12h 30mKLM

Sun 15/66:30 a.m.LHR - YOW

2 stops13h 35mKLM

Deal found 19/3C$ 1,115

Mon 28/71:55 p.m.YOW - LHR

2 stops13h 05mAer Lingus

Tue 19/88:50 a.m.LHR - YOW

2 stops17h 20mAer Lingus

Deal found 19/3C$ 1,216

Mon 5/56:15 a.m.YOW - LHR

2 stops48h 50mWestJet

Mon 19/51:55 p.m.LHR - YOW

2 stops44h 35mWestJet

Deal found 19/3C$ 1,453

Mon 31/35:15 p.m.YOW - LHR

1 stop15h 30mVirgin Atlantic

Mon 7/49:35 a.m.LHR - YOW

2 stops19h 34mVirgin Atlantic

Deal found 20/3C$ 1,476

Direct flights from Ottawa to Heathrow
Explore direct flight options from Ottawa to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 20 March 2025.

Mon 31/36:55 p.m.YOW - LHR

Nonstop6h 35mLufthansa

Mon 7/42:05 p.m.LHR - YOW

Nonstop7h 30mLufthansa

Deal found 20/3C$ 934

Thu 12/66:55 p.m.YOW - LHR

Nonstop6h 35mAir Canada

Wed 25/612:40 p.m.LHR - YOW

Nonstop7h 30mAir Canada

Deal found 19/3C$ 966

Sat 21/69:00 p.m.YOW - LHR

Nonstop6h 35mMultiple Airlines

Wed 25/612:40 p.m.LHR - YOW

Nonstop7h 30mMultiple Airlines

Deal found 19/3C$ 982

Last-minute flights from Ottawa to Heathrow
Discover last-minute flight deals from Ottawa to Heathrow. Data last updated 20 March 2025 and is based on user searches.

Thu 20/36:20 p.m.YOW - LHR

1 stop18h 15mAir France

Mon 24/37:35 p.m.LHR - YOW

1 stop24h 35mAir France

Deal found 19/3C$ 1,164

Fri 21/35:55 a.m.YOW - LHR

2 stops34h 15mDelta

Fri 28/35:20 p.m.LHR - YOW

2 stops34h 49mDelta

Deal found 20/3C$ 1,546

Wed 26/34:45 p.m.YOW - LHR

1 stop10h 25mAir Canada

Fri 4/42:05 p.m.LHR - YOW

1 stop9h 52mAir Canada

Deal found 20/3C$ 934

Wed 26/34:45 p.m.YOW - LHR

1 stop10h 25mLufthansa

Mon 31/32:05 p.m.LHR - YOW

Nonstop7h 20mLufthansa

Deal found 20/3C$ 1,353

Wed 26/311:35 a.m.YOW - LHR

2 stops17h 30mAer Lingus

Tue 1/47:40 a.m.LHR - YOW

2 stops16h 39mAer Lingus

Deal found 20/3C$ 1,564

Wed 26/37:15 a.m.YOW - LHR

1 stop9h 20mMultiple Airlines

Thu 3/42:05 p.m.LHR - YOW

Nonstop7h 30mMultiple Airlines

Deal found 20/3C$ 934

Thu 27/310:30 a.m.YOW - LHR

2 stops15h 25mUnited Airlines

Thu 3/46:50 a.m.LHR - YOW

2 stops14h 53mUnited Airlines

Deal found 20/3C$ 991

Thu 27/35:45 a.m.YOW - LHR

2 stops10h 50mMultiple Airlines

Sat 5/412:40 p.m.LHR - YOW

Nonstop7h 30mMultiple Airlines

Deal found 20/3C$ 1,044

Thu 27/36:20 p.m.YOW - LHR

2 stops12h 25mKLM

Sat 5/42:45 p.m.LHR - YOW

2 stops14h 24mKLM

Deal found 20/3C$ 1,292

Sat 29/36:20 p.m.YOW - LHR

1 stop19h 15mVirgin Atlantic

Fri 4/49:00 a.m.LHR - YOW

1 stop11h 05mVirgin Atlantic

Deal found 19/3C$ 7,556

Mon 31/34:45 p.m.YOW - LHR

1 stop12h 15mLufthansa

Mon 7/412:05 p.m.LHR - YOW

1 stop12h 14mLufthansa

Deal found 20/3C$ 942

Mon 31/35:15 p.m.YOW - LHR

1 stop15h 30mVirgin Atlantic

Mon 7/49:35 a.m.LHR - YOW

2 stops19h 34mVirgin Atlantic

Deal found 20/3C$ 1,476

One-way flights from Ottawa to Heathrow
Search for one-way flight options from Ottawa to Heathrow. Find affordable one-way fares based on user searches. Data last updated 20 March 2025.

Tue 13/54:10 p.m.YOW - LHR

2 stops17h 05mMultiple Airlines

Deal found 20/3C$ 485

Thu 8/56:00 a.m.YOW - LHR

1 stop25h 05mWestJet

Deal found 20/3C$ 594

Sat 17/51:55 p.m.YOW - LHR

2 stops13h 05mAer Lingus

Deal found 20/3C$ 909

Mon 28/46:55 p.m.YOW - LHR

Nonstop6h 35mAir Canada

Deal found 20/3C$ 942

Mon 31/34:45 p.m.YOW - LHR

1 stop12h 15mLufthansa

Deal found 19/3C$ 995

Mon 1/910:37 a.m.YOW - LHR

1 stop14h 43mUnited Airlines

Deal found 19/3C$ 1,642

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ottawa to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 13/5

6:40 p.m.-10:00 a.m.

1 stop10h 20m

London Heathrow

Thu 12/6

2:05 p.m.-4:35 p.m.

Nonstop7h 30m

C$ 934

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 13/5

2:30 p.m.-6:30 a.m.

1 stop11h 00m

London Heathrow

Tue 27/5

5:50 p.m.-1:45 p.m.

2 stops24h 55m

C$ 935

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 28/4

7:15 a.m.-9:00 p.m.

1 stop8h 45m

London Heathrow

Thu 8/5

9:30 a.m.-1:45 p.m.

1 stop9h 15m

C$ 944

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 13/5

1:55 p.m.-1:00 p.m.

2 stops18h 05m

London Heathrow

Thu 12/6

5:10 p.m.-5:04 p.m.

2 stops52h 54m

C$ 951

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 1/5

6:30 a.m.-6:45 a.m.

2 stops19h 15m

London Heathrow

Thu 8/5

7:25 a.m.-11:53 p.m.

2 stops21h 28m

C$ 994

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 1/6

5:15 p.m.-10:45 a.m.

2 stops12h 30m

London Heathrow

Sun 15/6

6:30 a.m.-3:05 p.m.

2 stops13h 35m

C$ 1,115

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 28/7

1:55 p.m.-8:00 a.m.

2 stops13h 05m

London Heathrow

Tue 19/8

8:50 a.m.-9:10 p.m.

2 stops17h 20m

C$ 1,216

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 13/5

4:10 p.m.-2:15 p.m.

2 stops17h 05m

C$ 485

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 8/5

6:00 a.m.-12:05 p.m.

1 stop25h 05m

C$ 594

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 17/5

1:55 p.m.-8:00 a.m.

2 stops13h 05m

C$ 909

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/3

Showing 1-10 of 13 results

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 round-trip 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?

The best time to book flights from Ottawa to London Heathrow Airport is 9 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 C$ 560). Flying from Ottawa to London Heathrow Airport in July is currently the most expensive (average of C$ 874). 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?

It’s typically best to fly out from Ottawa to London Heathrow Airport in the evening. Doing so could potentially save you 5% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Ottawa to London Heathrow Airport?

Travelers seeking maximum savings on their Ottawa to London Heathrow Airport flight should consider departing on Sunday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Heathrow by month

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 mm 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

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

See what other customers who have flown with KLM, Austrian Airlines and SWISS from Ottawa to London have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

KLM

7.8

Good

1,319 reviews

Check prices

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

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Austrian Airlines

7.6

Good

768 reviews

KLM

7.8

Good

1,319 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

SWISS

7.5

Good

1,567 reviews

KLM

7.8

Good

1,319 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

United Airlines

7.4

Good

8,609 reviews

KLM

7.8

Good

1,319 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Virgin Atlantic

7.4

Good

634 reviews

KLM

7.8

Good

1,319 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Related info for your journey

What airport do you fly from for flights from Ottawa to London Heathrow?
Most people fly from Ottawa (YOW) if they book a flight from Ottawa to London Heathrow. On average, Ottawa has 0 outbound flights to London Heathrow per day from 4 airlines. Ottawa is conveniently located just 10.6 km from Ottawa’s city centre.
What are the cheapest airlines flying from Ottawa to London Heathrow Airport round-trip?
Cheapflights users have booked flights from Ottawa to London Heathrow Airport round-trip from C$ 934. Other airlines that can offer you cheap pricing are Air Canada, from C$ 944, and SWISS, from C$ 959. Lufthansa is 19% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from Ottawa to London Heathrow Airport one-way?
The cheapest airlines for a one-way flight from Ottawa to London Heathrow Airport are WestJet (C$ 594), Aer Lingus (C$ 909), and Air Canada (C$ 942).
What are the cheapest flights from Ottawa to London Heathrow Airport?
On average you can expect to pay C$ 1,063 for a flight from Ottawa to London Heathrow Airport. The cheapest flight overall is C$ 936 while the most popular route, (Ottawa - London Heathrow) is currently priced at C$ 871.
Where are the most common layover locations when flying from Ottawa to London Heathrow Airport?
Most of the time, Ottawa to London Heathrow Airport flights that have layovers will stop in Montreal.
What are some popular things to do or see while on a layover in Montreal?
The majority of Montreal visitors spend their time at Centre Bell, Vieux-Port de Montréal, and Notre-Dame Basilica. Travelers on a layover in Montreal can visit Centre Bell, Vieux-Port de Montréal, and Notre-Dame Basilica, by traveling 14.6 km, 16.2 km, and 15.9 km, respectively after landing at Montreal Pierre Elliott Trudeau Intl. Those looking to explore during their layover in Montreal can rent a car from Montreal Pierre Elliott Trudeau Intl for about C$ 66 per day.
Where are the least popular layover locations for Ottawa to London Heathrow Airport flights?
Flights departing from Ottawa and landing in London Heathrow Airport layover in Toronto least frequently.
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 vacation 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 C$ 560). Flying from Ottawa to London Heathrow Airport in July is currently the most expensive (average of C$ 874). 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

Brentford

Hounslow

Sutton

Slough

Milton Keynes

Romford

Watford

Luton

Bromley

Bedford

Southall

Browse thousands of different options on Cheapflights for your next trip

Top 4 airlines flying from Ottawa to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	CheapestC$ 759	AverageC$ 853	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Air France	CheapestC$ 759	AverageC$ 955	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Air Canada	CheapestC$ 984	AverageC$ 1,142	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Lufthansa	CheapestC$ 1,007	AverageC$ 1,117	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights

Fly with Cheapflights

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?

Millions of users choose and trust Cheapflights to book the best flight deals from Ottawa to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Ottawa to Heathrow with no change fees?

Yes, we can. To see specific flights from Ottawa to Heathrow with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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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Cheap flights from Ottawa to London Heathrow Airport from C$ 485

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 13/5. Fares are subject to change and may not be available on all flights or dates of travel.

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 Saturday or Sunday and return on a Monday

Cheap flight deals from Ottawa to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Ottawa to Heathrow

Cheapest flights from Ottawa to HeathrowExplore 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.

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.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ottawa to London Heathrow Airport that are best for you.

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.

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 round-trip flight from Ottawa to Heathrow. Price data was last updated on 14 March 2025.

What is the cheapest month to book a flight from Ottawa to London Heathrow Airport?

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.

What is the cheapest day to fly from Ottawa to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from Ottawa to Heathrow. Price data was last updated on 16 December 2024.

Rainfall in Heathrow by month

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

Temperature in Heathrow by month

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

Reviews of airlines servicing Heathrow

See what other customers who have flown with KLM, Austrian Airlines and SWISS from Ottawa to London have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

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

Where are the most common layover locations when flying from Ottawa to London Heathrow Airport?

What are some popular things to do or see while on a layover in Montreal?

Where are the least popular layover locations for Ottawa to London Heathrow Airport flights?

Can I find deals for flights from Ottawa to Heathrow that include hotel bookings?

How can I find direct flights from Ottawa to Heathrow?

Can I find deals for business class flights from Ottawa to Heathrow?

What is the cheapest month to book a flight from Ottawa to London Heathrow Airport?

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Fly from Ottawa to Heathrow on these airlines

Choose from the following airlines for your flight from Ottawa to Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 20 March 2025.

Top 4 airlines flying from Ottawa to Heathrow

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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.