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

Currently priced at $524, United Airlines will fly you from London to Ottawa and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Lufthansa and Air Transat - these airlines can fly you to your destination from $587 and $678, respectively. You may be able to fly from London to Ottawa for 30% less than the average price by searching for these airlines.

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

The cheapest airlines for a one-way flight from London to Ottawa are Aer Lingus ($530), Air Transat ($556), and Lufthansa ($571).

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 Saturday 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 cheapest flights from London to Ottawa?

On average you can expect to pay $696 for a flight from London to Ottawa. The cheapest flight overall is $632 while the most popular route, (London Heathrow - Ottawa) is currently priced at $481.

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

Users have found that flying from London to Ottawa on a Thursday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

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

Find a great deal and save up to 39% by booking at least 33 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 London to Ottawa within the next two weeks, with the cheapest ticket starting at $726.

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 $752 on average during January, but can be found for as low as $501.

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

It’s optimal to fly from London to Ottawa in the morning. By choosing this option you can save up to 11% on the cost of your flight, compared to a flight at noon.

Most accurate provider : When it comes to deals on London-Ottawa flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-Ottawa flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-Ottawa flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on London-Ottawa flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-Ottawa flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Ottawa (YOW) is the airport you will fly into if you book a flight from London to Ottawa. You should not have trouble finding flights to Ottawa from London; the airport handles an average of 0 inbound flights from London per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Ottawa airport from London. It is only a 6.6 mi journey from Ottawa (YOW) to Ottawa’s city center.

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.

$449+ Flights from London to Ottawa

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from London to Ottawa with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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

Cheap flight deals from London to Ottawa

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$524 (United Airlines)
One-way from	$449 (Kiwi.com)
Popular in	August
Cheapest in	January
Average price	$665
Good round-trip deal	$665 or less

Provider with most accurate pricing for London (LON)-Ottawa flight deals.

Search Deals

Provider most trusted by Cheapflights users for London (LON)-Ottawa flights.

Search Deals

From London (LON) to Ottawa

Search Deals

One-way flight from London (LON) to Ottawa

Search Deals

Highest demand for flights based on searches. 15% potential increase in price ($138 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($22 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 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 March 28, 2025.

Sat 3/299:30 amLHR - YOW

2 stops16h 31mUnited Airlines

Wed 4/95:15 amYOW - LHR

2 stops20h 05mUnited Airlines

Deal found 3/27

$516

Thu 6/262:45 pmLHR - YOW

2 stops14h 37mMultiple Airlines

Mon 7/145:15 pmYOW - LHR

1 stop18h 20mMultiple Airlines

Deal found 3/27

$553

Thu 6/268:30 amLHR - YOW

2 stops18h 35mLufthansa

Sat 7/128:55 pmYOW - LHR

1 stop28h 35mLufthansa

Deal found 3/27

$587

Wed 5/1412:40 pmLGW - YOW

1 stop16h 42mMultiple Airlines

Mon 5/195:55 amYOW - LGW

1 stop23h 50mMultiple Airlines

Deal found 3/27

$595

Mon 6/212:40 pmLGW - YOW

1 stop16h 41mAir Transat

Thu 6/511:20 amYOW - LGW

1 stop18h 25mAir Transat

Deal found 3/27

$678

Wed 6/257:15 pmLHR - YOW

2 stops30h 00mSWISS

Mon 7/149:05 amYOW - LHR

2 stops31h 25mSWISS

Deal found 3/27

$825

Wed 4/96:00 amLHR - YOW

2 stops16h 24mAustrian Airlines

Sun 4/134:00 pmYOW - LHR

1 stop14h 50mAustrian Airlines

Deal found 3/27

$875

Wed 5/1410:45 amLGW - YOW

2 stops18h 37mWestJet

Mon 5/195:55 amYOW - LGW

2 stops22h 30mWestJet

Deal found 3/27

$915

Wed 4/92:45 pmLHR - YOW

2 stops14h 24mKLM

Tue 4/155:15 pmYOW - LHR

2 stops12h 30mKLM

Deal found 3/27

$973

Mon 6/26:30 amLHR - YOW

2 stops22h 49mLOT

Thu 6/57:55 pmYOW - LHR

2 stops21h 05mLOT

Deal found 3/27

$1,009

Mon 6/21:55 pmLHR - YOW

1 stop15h 46mWestJet

Thu 6/56:00 amYOW - LHR

1 stop25h 05mWestJet

Deal found 3/27

$1,132

Tue 4/86:35 pmLGW - YOW

2 stops29h 44mSWISS

Mon 4/141:00 pmYOW - LGW

2 stops23h 50mSWISS

Deal found 3/27

$1,289

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 March 28, 2025.

Wed 4/97:30 amLHR - YOW

2 stops16h 22mUnited Airlines

Mon 4/149:50 amYOW - LHR

2 stops18h 30mUnited Airlines

Deal found 3/27

$524

Thu 6/262:45 pmLHR - YOW

2 stops14h 37mMultiple Airlines

Mon 7/145:15 pmYOW - LHR

1 stop18h 20mMultiple Airlines

Deal found 3/27

$553

Thu 6/268:30 amLHR - YOW

2 stops18h 35mLufthansa

Sat 7/128:55 pmYOW - LHR

1 stop28h 35mLufthansa

Deal found 3/27

$587

Mon 6/212:40 pmLGW - YOW

1 stop16h 41mAir Transat

Thu 6/511:20 amYOW - LGW

1 stop18h 25mAir Transat

Deal found 3/27

$678

Wed 6/257:15 pmLHR - YOW

2 stops30h 00mSWISS

Tue 7/159:05 amYOW - LHR

2 stops31h 25mSWISS

Deal found 3/27

$825

Wed 4/96:00 amLHR - YOW

2 stops16h 24mAustrian Airlines

Sun 4/134:00 pmYOW - LHR

1 stop14h 50mAustrian Airlines

Deal found 3/27

$875

Wed 5/1410:45 amLGW - YOW

2 stops18h 37mWestJet

Mon 5/195:55 amYOW - LGW

2 stops22h 30mWestJet

Deal found 3/27

$915

Wed 4/92:45 pmLHR - YOW

2 stops14h 24mKLM

Tue 4/155:15 pmYOW - LHR

2 stops12h 30mKLM

Deal found 3/27

$973

Mon 6/26:30 amLHR - YOW

2 stops22h 49mLOT

Thu 6/57:55 pmYOW - LHR

2 stops21h 05mLOT

Deal found 3/27

$1,009

Wed 5/1412:40 pmLGW - YOW

1 stop16h 42mMultiple Airlines

Mon 5/195:55 amYOW - LGW

1 stop23h 50mMultiple Airlines

Deal found 3/27

$595

Mon 6/21:55 pmLHR - YOW

1 stop15h 46mWestJet

Thu 6/56:00 amYOW - LHR

1 stop25h 05mWestJet

Deal found 3/27

$1,132

Tue 4/86:35 pmLGW - YOW

2 stops29h 44mSWISS

Mon 4/141:00 pmYOW - LGW

2 stops23h 50mSWISS

Deal found 3/27

$1,289

Last-minute flights from London to Ottawa
Discover last-minute flight deals from London to Ottawa. Data last updated March 28, 2025 and is based on user searches.

Sat 3/299:30 amLHR - YOW

2 stops16h 31mUnited Airlines

Wed 4/95:15 amYOW - LHR

2 stops20h 05mUnited Airlines

Deal found 3/27

$516

Sun 4/612:05 pmLHR - YOW

1 stop12h 14mLufthansa

Mon 4/146:10 pmYOW - LHR

1 stop10h 25mLufthansa

Deal found 3/27

$854

Sun 4/66:00 amLHR - YOW

2 stops16h 24mSWISS

Sat 4/192:10 pmYOW - LHR

2 stops21h 15mSWISS

Deal found 3/27

$1,413

Sun 4/67:30 pmLHR - YOW

2 stops26h 54mAustrian Airlines

Mon 4/146:10 pmYOW - LHR

2 stops57h 35mAustrian Airlines

Deal found 3/27

$1,544

Sun 4/610:55 amLGW - YOW

2 stops41h 49mTurkish Airlines

Wed 4/164:45 pmYOW - LGW

2 stops39h 15mTurkish Airlines

Deal found 3/27

$3,611

Mon 4/712:40 pmLGW - YOW

1 stop17h 00mAir Transat

Sun 4/132:50 pmYOW - LGW

1 stop14h 55mAir Transat

Deal found 3/27

$1,156

Mon 4/76:35 pmLGW - YOW

2 stops29h 44mSWISS

Tue 4/151:00 pmYOW - LGW

2 stops23h 50mSWISS

Deal found 3/27

$1,347

Tue 4/86:35 pmLGW - YOW

2 stops29h 44mSWISS

Mon 4/141:00 pmYOW - LGW

2 stops23h 50mSWISS

Deal found 3/27

$1,289

Wed 4/96:00 amLHR - YOW

2 stops16h 24mAustrian Airlines

Sun 4/134:00 pmYOW - LHR

1 stop14h 50mAustrian Airlines

Deal found 3/27

$875

Wed 4/92:45 pmLHR - YOW

2 stops14h 24mKLM

Tue 4/155:15 pmYOW - LHR

2 stops12h 30mKLM

Deal found 3/27

$973

Thu 4/1012:40 pmLGW - YOW

1 stop10h 40mAir Transat

Sun 4/135:05 pmYOW - LGW

1 stop12h 40mAir Transat

Deal found 3/27

$801

Fri 4/112:05 pmLHR - YOW

1 stop30h 02mLufthansa

Mon 4/146:55 pmYOW - LHR

Nonstop6h 35mLufthansa

Deal found 3/27

$631

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 March 28, 2025.

Mon 7/216:25 amLGW - YOW

2 stops22h 57mMultiple Airlines

Deal found 3/26

$449

Wed 4/99:55 amLHR - YOW

3 stops43h 49mMultiple Airlines

Deal found 3/26

$464

Tue 4/88:50 amLHR - YOW

2 stops15h 29mAer Lingus

Deal found 3/26

$530

Sun 7/69:40 amLGW - YOW

1 stop19h 41mAir Transat

Deal found 3/27

$556

Wed 4/92:05 pmLHR - YOW

1 stop13h 02mLufthansa

Deal found 3/26

$571

Tue 4/82:10 pmLHR - YOW

1 stop31h 38mWestJet

Deal found 3/26

$614

Thu 7/2410:45 amLGW - YOW

2 stops18h 37mWestJet

Deal found 3/26

$772

Tue 4/86:35 pmLGW - YOW

2 stops29h 22mSWISS

Deal found 3/26

$1,732

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

Wed 4/9

7:30 am-6:52 pm

2 stops16h 22m

Ottawa

Mon 4/14

9:50 am-9:20 am

2 stops18h 30m

$524

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 6/26

2:45 pm-12:22 am

2 stops14h 37m

Ottawa

Mon 7/14

5:15 pm-4:35 pm

1 stop18h 20m

$553

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 6/26

8:30 am-10:05 pm

2 stops18h 35m

Ottawa

Sat 7/12

8:55 pm-6:30 am

1 stop28h 35m

$587

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Wed 5/14

12:40 pm-12:22 am

1 stop16h 42m

Ottawa

Mon 5/19

5:55 am-10:45 am

1 stop23h 50m

$595

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Mon 6/2

12:40 pm-12:21 am

1 stop16h 41m

Ottawa

Thu 6/5

11:20 am-10:45 am

1 stop18h 25m

$678

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 6/25

7:15 pm-8:15 pm

2 stops30h 00m

Ottawa

Tue 7/15

9:05 am-9:30 pm

2 stops31h 25m

$825

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 4/9

6:00 am-5:24 pm

2 stops16h 24m

Ottawa

Sun 4/13

4:00 pm-11:50 am

1 stop14h 50m

$875

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Wed 5/14

10:45 am-12:22 am

2 stops18h 37m

Ottawa

Mon 5/19

5:55 am-9:25 am

2 stops22h 30m

$915

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 4/9

2:45 pm-12:09 am

2 stops14h 24m

Ottawa

Tue 4/15

5:15 pm-10:45 am

2 stops12h 30m

$973

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 6/2

6:30 am-12:19 am

2 stops22h 49m

Ottawa

Thu 6/5

7:55 pm-10:00 pm

2 stops21h 05m

$1,009

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Showing 1-10 of 21 results

Compare providers for flights from London to Ottawa

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to Ottawa in March.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on London-Ottawa flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-Ottawa flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-Ottawa flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on London-Ottawa flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-Ottawa flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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?

To ensure you get the cheapest price possible for a flight from London to Ottawa, you should look to book at least 88 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from London to Ottawa (average of $294). Flying from London to Ottawa in May is currently the most expensive (average of $466). 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.

Rainfall in Ottawa by month

In terms of precipitation, rainfall in Ottawa ranges from 2.0 - 3.7 inches per month. June is typically the wettest month, when rainfall can reach 3.7 in. February is typically the driest time to visit Ottawa when rainfall is around 2.0 in.

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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 14.0 F).

Reviews of airlines servicing Ottawa

Peruse reviews from past customers who have flown with KLM, Air Transat and LOT 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

1,321 reviews

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

1,321 reviews

KLM

7.8

Good

1,321 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Air Transat

7.8

Good

381 reviews

KLM

7.8

Good

1,321 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

LOT

7.6

Good

1,063 reviews

KLM

7.8

Good

1,321 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Austrian Airlines

7.5

Good

769 reviews

KLM

7.8

Good

1,321 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

SWISS

7.5

Good

1,570 reviews

KLM

7.8

Good

1,321 reviews

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) is the airport you will fly into if you book a flight from London to Ottawa. You should not have trouble finding flights to Ottawa from London; the airport handles an average of 0 inbound flights from London per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Ottawa airport from London. It is only a 6.6 mi journey from Ottawa (YOW) to Ottawa’s city center.
What are the cheapest airlines flying from London to Ottawa round-trip?
Currently priced at $524, United Airlines will fly you from London to Ottawa and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Lufthansa and Air Transat - these airlines can fly you to your destination from $587 and $678, respectively. You may be able to fly from London to Ottawa for 30% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from London to Ottawa one-way?
The cheapest airlines for a one-way flight from London to Ottawa are Aer Lingus ($530), Air Transat ($556), and Lufthansa ($571).
What are the cheapest flights from London to Ottawa?
On average you can expect to pay $696 for a flight from London to Ottawa. The cheapest flight overall is $632 while the most popular route, (London Heathrow - Ottawa) is currently priced at $481.
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, January is the cheapest month in which you can book a flight from London to Ottawa (average of $294). Flying from London to Ottawa in May is currently the most expensive (average of $466). 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

Brockville

Pembroke

Petawawa

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for London to Ottawa

Heathrow to Pearson Intl flights

Gatwick to Pearson Intl flights

Heathrow to Pierre Elliott Trudeau Intl flights

Edinburgh to Pearson Intl flights

Manchester to Pearson Intl flights

Complete your trip

Ottawa car rentals

Montreal Pierre Elliott Trudeau Intl Airport car rentals

Ottawa Airport car rentals

Kingston Airport car rentals

Toronto car rentals

London car rentals

Windsor car rentals

Kitchener car rentals

Kingston car rentals

Niagara Falls car rentals

Kanata car rentals

The Glebe car rentals

Other flights to Ottawa

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$449+ Cheap flights from London (LON) to Ottawa (YOW)

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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from London to Ottawa with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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

Cheap flight deals from London to Ottawa

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip 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 March 28, 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 March 28, 2025.

Cheapflights Fare Finder

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

Compare providers for flights from London to Ottawa

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to Ottawa in March.

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 March 21, 2025.

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

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

Peruse reviews from past customers who have flown with KLM, Air Transat and LOT 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 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?

Traveling to a place near London?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to Ottawa

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

100% Free

Book with Flexibility

Travel Smart

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 March 28, 2025.