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$ 580 on this airline. Additional options worth looking into are United Airlines and Air France, starting at C$ 606 and C$ 722 round-trip. These flights start at 44% lower than the current average price 3 months from now.

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

C$ 546 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 Transat and Lufthansa, with prices starting from C$ 761 and C$ 770, 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$ 577. On average you can expect to pay C$ 1,613. The most popular route, (London Heathrow - Ottawa), can usually be booked for C$ 578.

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 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$ 986, or C$ 986 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$ 1,041 on average during January, but can be found for as low as C$ 697.

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. 2 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 2 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$ 421+ Flights from London to Ottawa

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$ 580
One-way from	C$ 421
Popular in	August
Cheapest in	January
Average price	C$ 985
Good round-trip deal	C$ 848 or less
Good one-way deal	C$ 811 or less

Air Canada
12/5-21/5
4 total stops
30h 50m total
London to Ottawa

Search Deals

15/5
2 total stops
30h 27m total
London to Ottawa

Search Deals

Highest demand for flights based on searches. 15% potential increase in price (C$ 269 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (C$ 44 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 15 April 2025.

Mon 12/59:30 a.m.LHR - YOW

2 stops15h 45mAir Canada

Wed 21/51:55 p.m.YOW - LHR

2 stops15h 05mAir Canada

Deal found 14/4C$ 580

Tue 22/47:45 a.m.LHR - YOW

2 stops31h 13mUnited Airlines

Wed 14/59:50 a.m.YOW - LHR

2 stops18h 30mUnited Airlines

Deal found 14/4C$ 606

Tue 13/59:00 a.m.LHR - YOW

1 stop11h 05mAir France

Tue 3/65:15 p.m.YOW - LHR

1 stop18h 20mAir France

Deal found 14/4C$ 730

Tue 13/59:00 a.m.LHR - YOW

1 stop11h 05mVirgin Atlantic

Tue 20/55:15 p.m.YOW - LHR

1 stop9h 45mVirgin Atlantic

Deal found 15/4C$ 758

Mon 8/98:30 a.m.LHR - YOW

2 stops18h 34mLufthansa

Mon 15/96:40 p.m.YOW - LHR

1 stop30h 50mLufthansa

Deal found 14/4C$ 804

Tue 1/76:15 a.m.LHR - YOW

1 stop13h 50mMultiple Airlines

Sun 20/75:15 p.m.YOW - LHR

2 stops15h 35mMultiple Airlines

Deal found 14/4C$ 825

Fri 30/511:35 a.m.LGW - YOW

2 stops41h 47mMultiple Airlines

Fri 6/65:55 a.m.YOW - LGW

1 stop23h 50mMultiple Airlines

Deal found 14/4C$ 834

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

2 stops51h 29mSWISS

Tue 20/53:55 p.m.YOW - LGW

2 stops20h 55mSWISS

Deal found 14/4C$ 836

Tue 6/56:00 a.m.LHR - YOW

2 stops18h 04mSWISS

Sun 18/51:55 p.m.YOW - LHR

2 stops37h 00mSWISS

Deal found 14/4C$ 836

Fri 9/56:00 a.m.LHR - YOW

2 stops23h 19mAustrian Airlines

Thu 22/57:55 p.m.YOW - LHR

1 stop10h 55mAustrian Airlines

Deal found 14/4C$ 841

Tue 13/512:40 p.m.LGW - YOW

1 stop13h 21mAir Transat

Tue 3/64:40 p.m.YOW - LGW

1 stop13h 05mAir Transat

Deal found 14/4C$ 851

Mon 8/98:45 a.m.LCY - YOW

2 stops18h 19mLufthansa

Tue 16/91:55 p.m.YOW - LCY

2 stops21h 30mLufthansa

Deal found 14/4C$ 857

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 15 April 2025.

Mon 12/59:30 a.m.LHR - YOW

2 stops15h 45mAir Canada

Wed 21/51:55 p.m.YOW - LHR

2 stops15h 05mAir Canada

Deal found 14/4C$ 580

Tue 13/58:30 a.m.LHR - YOW

2 stops18h 05mUnited Airlines

Tue 20/59:50 a.m.YOW - LHR

2 stops15h 55mUnited Airlines

Deal found 15/4C$ 606

Tue 13/56:15 a.m.LHR - YOW

1 stop13h 50mAir France

Tue 20/55:15 p.m.YOW - LHR

1 stop15h 30mAir France

Deal found 15/4C$ 722

Tue 13/59:00 a.m.LHR - YOW

1 stop11h 05mVirgin Atlantic

Tue 20/55:15 p.m.YOW - LHR

1 stop9h 45mVirgin Atlantic

Deal found 15/4C$ 758

Mon 8/98:30 a.m.LHR - YOW

2 stops18h 34mLufthansa

Mon 15/96:40 p.m.YOW - LHR

1 stop30h 50mLufthansa

Deal found 14/4C$ 804

Tue 1/76:15 a.m.LHR - YOW

1 stop13h 50mMultiple Airlines

Sun 20/75:15 p.m.YOW - LHR

2 stops15h 35mMultiple Airlines

Deal found 14/4C$ 825

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

2 stops51h 29mSWISS

Tue 20/53:55 p.m.YOW - LGW

2 stops20h 55mSWISS

Deal found 14/4C$ 836

Fri 9/56:00 a.m.LHR - YOW

2 stops23h 19mAustrian Airlines

Mon 19/57:55 p.m.YOW - LHR

1 stop10h 55mAustrian Airlines

Deal found 14/4C$ 841

Tue 13/512:40 p.m.LGW - YOW

1 stop13h 21mAir Transat

Tue 3/64:40 p.m.YOW - LGW

1 stop13h 05mAir Transat

Deal found 14/4C$ 851

Sat 6/96:30 a.m.LHR - YOW

2 stops13h 35mKLM

Sun 14/95:25 p.m.YOW - LHR

2 stops12h 20mKLM

Deal found 14/4C$ 873

Sat 3/510:45 a.m.LGW - YOW

2 stops18h 37mWestJet

Sat 17/56:05 a.m.YOW - LGW

2 stops22h 20mWestJet

Deal found 14/4C$ 1,046

Fri 30/511:35 a.m.LGW - YOW

2 stops41h 47mMultiple Airlines

Fri 6/65:55 a.m.YOW - LGW

1 stop23h 50mMultiple Airlines

Deal found 14/4C$ 834

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 15 April 2025.

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

Nonstop7h 30mAir Canada

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

Nonstop6h 35mAir Canada

Deal found 14/4C$ 832

Thu 15/52:05 p.m.LHR - YOW

Nonstop7h 30mLufthansa

Thu 22/56:55 p.m.YOW - LHR

Nonstop6h 35mLufthansa

Deal found 14/4C$ 851

Sat 14/612:40 p.m.LHR - YOW

Nonstop7h 30mMultiple Airlines

Thu 19/66:55 p.m.YOW - LHR

Nonstop6h 35mMultiple Airlines

Deal found 15/4C$ 1,067

Last-minute flights from London to Ottawa
Discover last-minute flight deals from London to Ottawa. Data last updated 15 April 2025 and is based on user searches.

Mon 21/49:30 a.m.LHR - YOW

2 stops19h 14mLufthansa

Mon 28/44:45 p.m.YOW - LHR

1 stop12h 15mLufthansa

Deal found 14/4C$ 812

Tue 22/47:45 a.m.LHR - YOW

2 stops31h 13mUnited Airlines

Wed 14/59:50 a.m.YOW - LHR

2 stops18h 30mUnited Airlines

Deal found 14/4C$ 606

Tue 22/49:30 a.m.LHR - YOW

1 stop10h 37mAir Canada

Wed 14/59:00 p.m.YOW - LHR

Nonstop6h 35mAir Canada

Deal found 14/4C$ 845

Tue 22/412:05 p.m.LHR - YOW

1 stop12h 14mMultiple Airlines

Sat 26/46:00 a.m.YOW - LHR

2 stops19h 20mMultiple Airlines

Deal found 14/4C$ 1,277

Tue 22/410:15 a.m.LHR - YOW

2 stops18h 29mLOT

Sat 26/44:00 p.m.YOW - LHR

2 stops25h 00mLOT

Deal found 14/4C$ 1,767

Thu 24/49:05 a.m.LHR - YOW

2 stops37h 19mAustrian Airlines

Mon 5/57:55 p.m.YOW - LHR

1 stop10h 55mAustrian Airlines

Deal found 14/4C$ 837

Thu 24/412:40 p.m.LGW - YOW

1 stop31h 30mAir Transat

Mon 5/511:20 a.m.YOW - LGW

1 stop18h 25mAir Transat

Deal found 14/4C$ 968

Thu 24/41:05 p.m.LGW - YOW

1 stop24h 30mMultiple Airlines

Wed 30/44:55 p.m.YOW - LGW

2 stops33h 30mMultiple Airlines

Deal found 15/4C$ 997

Thu 24/46:40 p.m.LGW - YOW

2 stops51h 44mSWISS

Mon 5/52:35 p.m.YOW - LGW

2 stops22h 15mSWISS

Deal found 14/4C$ 1,416

Thu 24/45:10 p.m.LHR - YOW

2 stops31h 09mSWISS

Wed 30/41:00 p.m.YOW - LHR

2 stops13h 55mSWISS

Deal found 15/4C$ 1,423

Thu 24/49:25 a.m.LCY - YOW

2 stops14h 54mSWISS

Mon 5/52:35 p.m.YOW - LCY

2 stops16h 55mSWISS

Deal found 14/4C$ 1,790

Thu 24/411:30 a.m.LHR - YOW

2 stops17h 14mLufthansa

Wed 30/49:00 p.m.YOW - LHR

Nonstop6h 35mLufthansa

Deal found 15/4C$ 815

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 15 April 2025.

Thu 15/510:55 p.m.STN - YOW

2 stops30h 27mMultiple Airlines

Deal found 14/4C$ 421

Fri 9/57:00 p.m.LGW - YOW

3 stops44h 25mMultiple Airlines

Deal found 15/4C$ 477

Sat 3/59:10 p.m.LHR - YOW

3 stops50h 05mMultiple Airlines

Deal found 14/4C$ 505

Sat 3/510:45 a.m.LGW - YOW

2 stops18h 37mWestJet

Deal found 14/4C$ 546

Wed 30/78:40 a.m.LCY - YOW

2 stops20h 42mMultiple Airlines

Deal found 15/4C$ 648

Mon 8/91:55 p.m.LHR - YOW

1 stop15h 45mWestJet

Deal found 14/4C$ 748

Sun 27/79:40 a.m.LGW - YOW

1 stop29h 41mAir Transat

Deal found 14/4C$ 761

Thu 15/52:05 p.m.LHR - YOW

Nonstop7h 30mLufthansa

Deal found 14/4C$ 770

Mon 26/58:50 a.m.LHR - YOW

2 stops17h 19mAer Lingus

Deal found 14/4C$ 1,007

Wed 30/75:40 p.m.LHR - YOW

1 stop10h 28mAir Canada

Deal found 15/4C$ 1,128

Mon 8/98:40 a.m.LCY - YOW

2 stops20h 42mKLM

Deal found 14/4C$ 1,182

Tue 6/56:45 a.m.LCY - YOW

2 stops17h 19mAer Lingus

Deal found 15/4C$ 1,258

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

Mon 12/5

9:30 a.m.-8:15 p.m.

2 stops15h 45m

Ottawa

Wed 21/5

1:55 p.m.-10:00 a.m.

2 stops15h 05m

C$ 580

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Tue 13/5

8:30 a.m.-9:35 p.m.

2 stops18h 05m

Ottawa

Tue 20/5

9:50 a.m.-6:45 a.m.

2 stops15h 55m

C$ 606

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Tue 13/5

6:15 a.m.-3:05 p.m.

1 stop13h 50m

Ottawa

Tue 20/5

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

1 stop15h 30m

C$ 722

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Tue 13/5

9:00 a.m.-3:05 p.m.

1 stop11h 05m

Ottawa

Tue 20/5

5:15 p.m.-8:00 a.m.

1 stop9h 45m

C$ 758

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 8/9

8:30 a.m.-10:04 p.m.

2 stops18h 34m

Ottawa

Mon 15/9

6:40 p.m.-6:30 a.m.

1 stop30h 50m

C$ 804

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Tue 1/7

6:15 a.m.-3:05 p.m.

1 stop13h 50m

Ottawa

Sun 20/7

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

2 stops15h 35m

C$ 825

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Fri 30/5

11:35 a.m.-12:22 a.m.

2 stops41h 47m

Ottawa

Fri 6/6

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

1 stop23h 50m

C$ 834

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Tue 6/5

6:35 p.m.-5:04 p.m.

2 stops51h 29m

Ottawa

Tue 20/5

3:55 p.m.-5:50 p.m.

2 stops20h 55m

C$ 836

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Tue 6/5

6:00 a.m.-7:04 p.m.

2 stops18h 04m

Ottawa

Sun 18/5

1:55 p.m.-7:55 a.m.

2 stops37h 00m

C$ 836

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 9/5

6:00 a.m.-12:19 a.m.

2 stops23h 19m

Ottawa

Mon 19/5

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

1 stop10h 55m

C$ 841

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/4

Showing 1-10 of 35 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 KLM, Air Transat and Austrian Airlines 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.

KLM

7.8

Good

1,323 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

1,323 reviews

KLM

7.8

Good

1,323 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Air Transat

7.8

Good

385 reviews

KLM

7.8

Good

1,323 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Austrian Airlines

7.6

Good

775 reviews

KLM

7.8

Good

1,323 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Air France

7.5

Good

1,435 reviews

KLM

7.8

Good

1,323 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

SWISS

7.5

Good

1,578 reviews

KLM

7.8

Good

1,323 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

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. 2 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 2 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$ 580 on this airline. Additional options worth looking into are United Airlines and Air France, starting at C$ 606 and C$ 722 round-trip. These flights start at 44% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from London to Ottawa one-way?
C$ 546 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 Transat and Lufthansa, with prices starting from C$ 761 and C$ 770, 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$ 577. On average you can expect to pay C$ 1,613. The most popular route, (London Heathrow - Ottawa), can usually be booked for C$ 578.
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 2 airlines flying from London to Ottawa

Airline	Cheapest	Average	Flexibility	On-time
Air France	CheapestC$ 741	AverageC$ 921	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Air Canada	CheapestC$ 829	AverageC$ 1,058	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

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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.

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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$ 421

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 15/5. 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

Good one-way deal

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 15 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 15 April 2025.

Cheapflights Fare Finder

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 11 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 15 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 15 April 2025.

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?

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Alternative routes for London to Ottawa

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Top 2 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 15 April 2025.