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

Our cheapest airline available from London to Ottawa is Air Canada. Our recent data shows that you can find tickets from as low as C$ 694 on this airline. Additional options worth looking into are Air France and Lufthansa, starting at C$ 743 and C$ 802 round-trip. These flights start at 32% lower than the current average price 3 months from now.

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

C$ 550 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 Transat, with prices starting from C$ 764 and C$ 783, respectively.

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

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

What are the most popular routes from London to Ottawa?

When deciding which route to take from London to Ottawa consider London Heathrow - Ottawa, London Gatwick - Ottawa or London City - Ottawa as they are the most popular.

What are the cheapest flights from London to Ottawa?

The cheapest flight price from London to Ottawa is C$ 575. On average you can expect to pay C$ 1,609. The most popular route, (London Heathrow - Ottawa), can usually be booked for C$ 743.

What are the most reliable airlines from London to Ottawa?

Before booking your flight to Ottawa from London, check out the most reliable airlines to get you to your destination on time: Air Canada (100%), Aegean Airlines (100%), Austrian Airlines( 100%).

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

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

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

Flying to your destination on a Tuesday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to Ottawa. Check prices with Cheapflights to find a great deal for your trip.

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

Travellers have found it’s best to book a flight 33 days in advance to save up to 23% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 33 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from London to Ottawa 1-2 weeks in advance for as low as C$ 983, or C$ 983 for flights within the next 24 hours.

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

Due to multiple factors, expect to potentially pay more when booking in August. For low rates, January can be a great choice for travel to Ottawa. Flights to Ottawa from London in January are about C$ 1,034 on average during January, but can be found for as low as C$ 694.

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

Ottawa (YOW), located 10.6 km from the city centre, is the airport you fly into when you book flights from London to Ottawa. 3 airlines have flights to Ottawa from London on a regular basis. Booking flights from London to Ottawa should not be difficult; the airport handles an average of 4 inbound flights from London per day.

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

Yes. In addition to deals on London to Ottawa flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from London to Ottawa?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Ottawa.

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

Yes. Cheapflights offers flight deals from London to Ottawa 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$ 410+ Flights from London to Ottawa - Compare & Save Big

Cheapflights Tip: The best prices from London to Ottawa are usually found in January or February, booked 88 days in advance, depart on a Monday or Tuesday and return on a Saturday

Cheap flight deals from London to Ottawa

Round-trip from	C$ 694
One-way from	C$ 410
Popular in	August
Cheapest in	January
Average price	C$ 970
Good round-trip deal	C$ 1,008 or less
Good one-way deal	C$ 808 or less

Air Canada
21/6-23/6
2 total stops
29h 11m total
London to Ottawa

Search Deals

9/6
2 total stops
31h 52m total
London to Ottawa

Search Deals

Highest demand for flights based on searches. 15% potential increase in price (C$ 264 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (C$ 45 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from London (LON) to Ottawa.

Search Deals

Price to beat on a one-way flight from London (LON) to Ottawa.

Search Deals

Find flight deals from London to Ottawa

Cheapest flights from London to Ottawa
Explore the most affordable flight options available from London to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.

Sat 21/66:00 p.m.LHR - YOW

1 stop20h 11mAir Canada

Mon 23/67:00 a.m.YOW - LHR

1 stop9h 00mAir Canada

Deal found 28/4C$ 694

Mon 12/57:45 p.m.LHR - YOW

1 stop24h 20mAir France

Wed 21/55:15 p.m.YOW - LHR

1 stop12h 15mAir France

Deal found 28/4C$ 743

Mon 15/97:45 p.m.LHR - YOW

1 stop24h 20mVirgin Atlantic

Mon 29/95:15 p.m.YOW - LHR

1 stop15h 30mVirgin Atlantic

Deal found 28/4C$ 777

Mon 12/53:20 p.m.LHR - YOW

1 stop28h 45mMultiple Airlines

Wed 21/55:15 p.m.YOW - LHR

2 stops15h 35mMultiple Airlines

Deal found 28/4C$ 790

Sat 21/612:40 p.m.LHR - YOW

Nonstop7h 20mLufthansa

Sat 28/65:55 p.m.YOW - LHR

1 stop31h 40mLufthansa

Deal found 28/4C$ 802

Sun 1/69:40 a.m.LGW - YOW

1 stop19h 42mMultiple Airlines

Sat 14/65:55 a.m.YOW - LGW

1 stop23h 50mMultiple Airlines

Deal found 28/4C$ 804

Mon 12/52:45 p.m.LHR - YOW

2 stops14h 37mKLM

Wed 21/55:15 p.m.YOW - LHR

2 stops15h 35mKLM

Deal found 28/4C$ 805

Mon 9/610:00 p.m.STN - YOW

2 stops31h 22mMultiple Airlines

Mon 16/65:55 a.m.YOW - STN

2 stops27h 05mMultiple Airlines

Deal found 27/4C$ 805

Wed 7/58:40 a.m.LHR - YOW

2 stops15h 24mSWISS

Thu 22/53:55 p.m.YOW - LHR

2 stops24h 50mSWISS

Deal found 28/4C$ 844

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

2 stops23h 19mAustrian Airlines

Wed 14/57:55 p.m.YOW - LHR

1 stop10h 55mAustrian Airlines

Deal found 28/4C$ 845

Mon 8/912:40 p.m.LGW - YOW

1 stop16h 41mAir Transat

Fri 12/92:20 p.m.YOW - LGW

1 stop15h 25mAir Transat

Deal found 28/4C$ 855

Thu 12/68:45 a.m.LCY - YOW

2 stops20h 37mMultiple Airlines

Thu 19/65:55 a.m.YOW - LCY

2 stops21h 25mMultiple Airlines

Deal found 28/4C$ 881

Best flights from London to Ottawa
Discover carefully curated flight deals from London to Ottawa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 29 April 2025.

Sat 21/66:00 p.m.LHR - YOW

1 stop20h 11mAir Canada

Mon 23/67:00 a.m.YOW - LHR

1 stop9h 00mAir Canada

Deal found 28/4C$ 694

Mon 12/57:45 p.m.LHR - YOW

1 stop24h 20mAir France

Wed 21/55:15 p.m.YOW - LHR

1 stop12h 15mAir France

Deal found 28/4C$ 743

Mon 12/53:20 p.m.LHR - YOW

1 stop28h 45mMultiple Airlines

Wed 21/55:15 p.m.YOW - LHR

2 stops15h 35mMultiple Airlines

Deal found 28/4C$ 790

Sat 21/612:40 p.m.LHR - YOW

Nonstop7h 20mLufthansa

Sat 28/65:55 p.m.YOW - LHR

1 stop31h 40mLufthansa

Deal found 28/4C$ 802

Mon 12/52:45 p.m.LHR - YOW

2 stops14h 37mKLM

Wed 21/55:15 p.m.YOW - LHR

2 stops15h 35mKLM

Deal found 28/4C$ 805

Mon 12/53:20 p.m.LHR - YOW

1 stop28h 45mVirgin Atlantic

Wed 21/55:15 p.m.YOW - LHR

1 stop9h 45mVirgin Atlantic

Deal found 28/4C$ 812

Wed 7/58:40 a.m.LHR - YOW

2 stops15h 24mSWISS

Thu 22/53:55 p.m.YOW - LHR

2 stops24h 50mSWISS

Deal found 28/4C$ 844

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

2 stops23h 19mAustrian Airlines

Wed 14/57:55 p.m.YOW - LHR

1 stop10h 55mAustrian Airlines

Deal found 28/4C$ 845

Mon 8/912:40 p.m.LGW - YOW

1 stop16h 41mAir Transat

Fri 12/92:20 p.m.YOW - LGW

1 stop15h 25mAir Transat

Deal found 28/4C$ 855

Mon 12/58:40 a.m.LHR - YOW

2 stops30h 18mUnited Airlines

Wed 21/56:30 a.m.YOW - LHR

2 stops19h 45mUnited Airlines

Deal found 28/4C$ 904

Mon 9/66:50 a.m.LHR - YOW

2 stops12h 00mBrussels Airlines

Sun 22/61:55 p.m.YOW - LHR

2 stops13h 45mBrussels Airlines

Deal found 28/4C$ 1,035

Thu 8/59:35 a.m.LHR - YOW

2 stops19h 47mDelta

Fri 23/55:55 a.m.YOW - LHR

2 stops20h 20mDelta

Deal found 28/4C$ 1,085

Direct flights from London to Ottawa
Explore direct flight options from London to Ottawa based on user searches, and compare prices and availability for your desired travel dates. Data last updated 29 April 2025.

Sat 13/912:40 p.m.LHR - YOW

Nonstop7h 20mAir Canada

Sat 27/99:00 p.m.YOW - LHR

Nonstop6h 35mAir Canada

Deal found 28/4C$ 830

Wed 28/512:40 p.m.LHR - YOW

Nonstop7h 30mMultiple Airlines

Thu 5/66:55 p.m.YOW - LHR

Nonstop6h 35mMultiple Airlines

Deal found 28/4C$ 868

Wed 4/612:40 p.m.LHR - YOW

Nonstop7h 20mLufthansa

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

Nonstop6h 35mLufthansa

Deal found 28/4C$ 901

Last-minute flights from London to Ottawa
Discover last-minute flight deals from London to Ottawa. Data last updated 29 April 2025 and is based on user searches.

Sun 4/510:45 a.m.LGW - YOW

1 stop31h 06mMultiple Airlines

Sun 25/58:20 a.m.YOW - LGW

2 stops20h 05mMultiple Airlines

Deal found 28/4C$ 984

Mon 5/59:30 a.m.LHR - YOW

2 stops19h 49mLufthansa

Mon 19/56:55 p.m.YOW - LHR

Nonstop6h 35mLufthansa

Deal found 28/4C$ 822

Mon 5/53:20 p.m.LHR - YOW

2 stops14h 02mAir France

Mon 12/55:15 p.m.YOW - LHR

1 stop12h 15mAir France

Deal found 27/4C$ 870

Tue 6/58:45 a.m.LHR - YOW

2 stops15h 19mMultiple Airlines

Thu 22/57:00 a.m.YOW - LHR

1 stop9h 00mMultiple Airlines

Deal found 28/4C$ 841

Tue 6/512:40 p.m.LGW - YOW

1 stop24h 21mAir Transat

Mon 19/57:00 a.m.YOW - LGW

1 stop22h 45mAir Transat

Deal found 28/4C$ 887

Tue 6/56:35 p.m.LGW - YOW

2 stops29h 29mSWISS

Mon 19/53:55 p.m.YOW - LGW

2 stops20h 55mSWISS

Deal found 28/4C$ 935

Wed 7/58:40 a.m.LHR - YOW

2 stops15h 24mSWISS

Thu 22/53:55 p.m.YOW - LHR

2 stops24h 50mSWISS

Deal found 28/4C$ 844

Wed 7/58:45 a.m.LCY - YOW

2 stops20h 34mMultiple Airlines

Sat 24/51:55 p.m.YOW - LCY

2 stops22h 20mMultiple Airlines

Deal found 28/4C$ 948

Wed 7/510:45 a.m.LGW - YOW

2 stops18h 37mWestJet

Sat 24/55:55 a.m.YOW - LGW

2 stops22h 30mWestJet

Deal found 28/4C$ 1,256

Thu 8/52:05 p.m.LHR - YOW

Nonstop7h 30mAir Canada

Wed 14/54:05 p.m.YOW - LHR

1 stop9h 25mAir Canada

Deal found 28/4C$ 833

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

2 stops23h 19mAustrian Airlines

Wed 14/57:55 p.m.YOW - LHR

1 stop10h 55mAustrian Airlines

Deal found 28/4C$ 845

Thu 8/59:35 a.m.LHR - YOW

2 stops19h 47mDelta

Fri 23/55:55 a.m.YOW - LHR

2 stops20h 20mDelta

Deal found 28/4C$ 1,085

One-way flights from London to Ottawa
Search for one-way flight options from London to Ottawa. Find affordable one-way fares based on user searches. Data last updated 29 April 2025.

Mon 9/69:30 p.m.LGW - YOW

2 stops31h 52mMultiple Airlines

Deal found 28/4C$ 410

Mon 9/610:00 p.m.STN - YOW

2 stops31h 22mMultiple Airlines

Deal found 27/4C$ 423

Tue 10/66:20 a.m.LHR - YOW

2 stops23h 02mMultiple Airlines

Deal found 28/4C$ 467

Tue 10/66:45 a.m.LCY - YOW

2 stops22h 37mMultiple Airlines

Deal found 28/4C$ 518

Mon 5/510:35 a.m.LGW - YOW

2 stops18h 47mWestJet

Deal found 28/4C$ 550

Sat 3/52:10 p.m.LHR - YOW

1 stop21h 35mWestJet

Deal found 28/4C$ 611

Wed 7/512:40 p.m.LHR - YOW

Nonstop7h 30mLufthansa

Deal found 28/4C$ 764

Thu 12/612:40 p.m.LGW - YOW

1 stop24h 25mAir Transat

Deal found 27/4C$ 783

Tue 24/67:10 p.m.LCY - YOW

2 stops26h 55mLufthansa

Deal found 28/4C$ 891

Sat 31/55:40 p.m.LHR - YOW

1 stop10h 27mAir Canada

Deal found 27/4C$ 1,063

Tue 13/57:50 p.m.LHR - YOW

2 stops26h 14mTAP AIR PORTUGAL

Deal found 28/4C$ 1,128

Thu 12/69:05 a.m.LCY - YOW

2 stops17h 04mAer Lingus

Deal found 28/4C$ 1,161

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Sat 21/6

6:00 p.m.-9:11 a.m.

1 stop20h 11m

Ottawa

Mon 23/6

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

1 stop9h 00m

C$ 694

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 12/5

7:45 p.m.-3:05 p.m.

1 stop24h 20m

Ottawa

Wed 21/5

5:15 p.m.-10:30 a.m.

1 stop12h 15m

C$ 743

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 15/9

7:45 p.m.-3:05 p.m.

1 stop24h 20m

Ottawa

Mon 29/9

5:15 p.m.-1:45 p.m.

1 stop15h 30m

C$ 777

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 12/5

3:20 p.m.-3:05 p.m.

1 stop28h 45m

Ottawa

Wed 21/5

5:15 p.m.-1:50 p.m.

2 stops15h 35m

C$ 790

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Sat 21/6

12:40 p.m.-3:00 p.m.

Nonstop7h 20m

Ottawa

Sat 28/6

5:55 p.m.-6:35 a.m.

1 stop31h 40m

C$ 802

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sun 1/6

9:40 a.m.-12:22 a.m.

1 stop19h 42m

Ottawa

Sat 14/6

5:55 a.m.-10:45 a.m.

1 stop23h 50m

C$ 804

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 12/5

2:45 p.m.-12:22 a.m.

2 stops14h 37m

Ottawa

Wed 21/5

5:15 p.m.-1:50 p.m.

2 stops15h 35m

C$ 805

LondonOttawa

STN - YOW

STNYOW

London Stansted

Mon 9/6

10:00 p.m.-12:22 a.m.

2 stops31h 22m

Ottawa

Mon 16/6

5:55 a.m.-2:00 p.m.

2 stops27h 05m

C$ 805

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 12/5

6:00 a.m.-5:04 p.m.

2 stops40h 04m

Ottawa

Thu 22/5

3:55 p.m.-9:45 p.m.

2 stops24h 50m

C$ 844

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 9/5

7:30 p.m.-12:19 a.m.

2 stops33h 49m

Ottawa

Wed 21/5

7:55 p.m.-11:50 a.m.

1 stop10h 55m

C$ 847

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Showing 1-10 of 37 results

Best time to book a flight from London to Ottawa

Have a flexible travel schedule? Discover the best time to fly to Ottawa from London 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 London to Ottawa

How far ahead should I book a flight from London to Ottawa?

The price you pay for your flight from London to Ottawa may vary depending on when you book. For the best chance of a lower fare, look to book 88 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, October is the cheapest month in which you can book a flight from London to Ottawa (average of C$ 224). Flying from London to Ottawa in December is currently the most expensive (average of C$ 326). 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 LON to YOW?

A simple way to save on the total cost of your ticket is to fly from London to Ottawa at noon. If you’re flexible enough to do this you can expect to save up to 4% on your trip compared to booking a flight in the afternoon.

Rainfall in Ottawa by month

In terms of precipitation, rainfall in Ottawa ranges from 50.0 - 93.0 mm per month. June is typically the wettest month, when rainfall can reach 93.0 mm. February is typically the driest time to visit Ottawa when rainfall is around 50.0 mm.

Temperature in Ottawa by month

If weather is an important factor for your trip to Ottawa, 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 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -10.0 C).

Reviews of airlines servicing Ottawa

Peruse reviews from past customers who have flown with Delta, KLM and Air Transat from London to Ottawa to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,929 reviews

Check prices

Reviews

1 / 20

6.0

Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know

Delta

8.0

Very good

7,929 reviews

Delta

8.0

Very good

7,929 reviews

Check prices

Reviews

1 / 20

6.0

Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know

KLM

7.8

Good

1,333 reviews

Delta

8.0

Very good

7,929 reviews

Check prices

Reviews

1 / 20

6.0

Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know

Air Transat

7.8

Good

385 reviews

Delta

8.0

Very good

7,929 reviews

Check prices

Reviews

1 / 20

6.0

Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know

Austrian Airlines

7.6

Good

780 reviews

Delta

8.0

Very good

7,929 reviews

Check prices

Reviews

1 / 20

6.0

Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know

SWISS

7.5

Good

1,587 reviews

Delta

8.0

Very good

7,929 reviews

Check prices

Reviews

1 / 20

6.0

Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know

Related info for your journey

What airport do you fly into for flights to Ottawa from London?
Ottawa (YOW), located 10.6 km from the city centre, is the airport you fly into when you book flights from London to Ottawa. 3 airlines have flights to Ottawa from London on a regular basis. Booking flights from London to Ottawa should not be difficult; the airport handles an average of 4 inbound flights from London per day.
What are the cheapest airlines flying from London to Ottawa round-trip?
Our cheapest airline available from London to Ottawa is Air Canada. Our recent data shows that you can find tickets from as low as C$ 694 on this airline. Additional options worth looking into are Air France and Lufthansa, starting at C$ 743 and C$ 802 round-trip. These flights start at 32% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from London to Ottawa one-way?
C$ 550 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 Transat, with prices starting from C$ 764 and C$ 783, respectively.
What are the most popular routes from London to Ottawa?
When deciding which route to take from London to Ottawa consider London Heathrow - Ottawa, London Gatwick - Ottawa or London City - Ottawa as they are the most popular.
What are the most reliable airlines from London to Ottawa?
Before booking your flight to Ottawa from London, check out the most reliable airlines to get you to your destination on time: Air Canada (100%), Aegean Airlines (100%), Austrian Airlines( 100%).
What are the cheapest flights from London to Ottawa?
The cheapest flight price from London to Ottawa is C$ 575. On average you can expect to pay C$ 1,609. The most popular route, (London Heathrow - Ottawa), can usually be booked for C$ 743.
Can I find deals for flights from London to Ottawa that include hotel bookings?
Yes. In addition to deals on London to Ottawa flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from London to Ottawa?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Ottawa.
Can I find deals for business class flights from London to Ottawa?
Yes. Cheapflights offers flight deals from London to Ottawa 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 London to Ottawa?
Currently, October is the cheapest month in which you can book a flight from London to Ottawa (average of C$ 224). Flying from London to Ottawa in December is currently the most expensive (average of C$ 326). 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

Gatineau

Perth

Smiths Falls

Prescott

Brockville

Wakefield

Lanark

Browse thousands of different options on Cheapflights for your next trip

Other flights to Ottawa

Top 3 airlines flying from London to Ottawa

Airline	Cheapest	Average	Flexibility	On-time
Air France	CheapestC$ 738	AverageC$ 968	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Air Canada	CheapestC$ 826	AverageC$ 1,046	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Lufthansa	CheapestC$ 857	AverageC$ 1,091	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights

Fly with Cheapflights

How does Cheapflights help users find flights from London to Ottawa?

When you search for this flight from London to Ottawa, 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 London to Ottawa?

Cheapflights helps you find that perfect flight to Ottawa from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to Ottawa flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from London to Ottawa become cheaper?

Yes! Start tracking prices for London to Ottawa flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from London to Ottawa from C$ 410

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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London to Ottawa are usually found in January or February, booked 88 days in advance, depart on a Monday or Tuesday and return on a Saturday

Cheap flight deals from London to Ottawa

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

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Find flight deals from London to Ottawa

Cheapest flights from London to OttawaExplore the most affordable flight options available from London to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.

Explore the most affordable flight options available from London to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.

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

Best time to book a flight from London to Ottawa

Have a flexible travel schedule? Discover the best time to fly to Ottawa from London with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London to Ottawa

How far ahead should I book a flight from London to Ottawa?

Use this chart to determine the optimal time to book a round-trip flight from London to Ottawa. Price data was last updated on 25 April 2025.

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

What is the cheapest time of day to fly from LON to YOW?

Find hourly flight availability from London to Ottawa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 April 2025.

Rainfall in Ottawa by month

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

Temperature in Ottawa by month

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

Reviews of airlines servicing Ottawa

Get insights into the airlines that provide service to Ottawa. 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 Ottawa. Reviews last updated 29 April 2025.

Peruse reviews from past customers who have flown with Delta, KLM and Air Transat from London to Ottawa to help guide your decision. In addition to providing an overall rating, 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 London to Ottawa. 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 into for flights to Ottawa from London?

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

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

What are the most popular routes from London to Ottawa?

What are the most reliable airlines from London to Ottawa?

What are the cheapest flights from London to Ottawa?

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

How can I find direct flights from London to Ottawa?

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

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

Travelling to a place near London?

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Alternative routes for London to Ottawa

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from London to Ottawa

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Cheapest flights from London to Ottawa
Explore the most affordable flight options available from London to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.