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

Cheapflights users have booked flights from Ottawa to London round-trip from £482. Other airlines that can offer you cheap pricing are Air Transat, from £485, and United Airlines, from £485. Porter Airlines is priced at 15% lower than the current average price of a flight leaving 3 months from now.

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

£229 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and Lufthansa, with prices starting from £313 and £315, respectively.

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

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

What are the most popular routes from Ottawa to London?

While some choose either Ottawa - London Gatwick or Ottawa - London City, Ottawa - London Heathrow is the most popular route from Ottawa to London.

What are the cheapest flights from Ottawa to London?

While on average a flight from Ottawa to London is generally £542, our data shows the cheapest flight currently is £488. When looking at the most popular route, (Ottawa - London Heathrow), you can expect to pay £475 for that flight.

What are the most reliable airlines from Ottawa to London?

The top 3 most reliable airlines when flying from Ottawa to London are Air Canada (89%), Aegean Airlines (89%) and Austrian Airlines (89%).

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

It’s generally more expensive to depart on a Tuesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

Travelers have found it’s best to book a flight 50 days in advance to save up to 16% 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 50 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 Ottawa to London 1-2 weeks in advance for as low as £512, or £512 for flights within the next 24 hours.

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

Our data shows that February tends to be the cheapest month to fly to London from Ottawa. Users have commonly found prices around £569 for the month, but tickets can be as low as £429. Due to multiple factors, prepare for potentially higher prices in December.

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

Most people fly from Ottawa (YOW) if they book a flight from Ottawa to London. On average, Ottawa has 1 outbound flight to London per day from 2 airlines. Ottawa is conveniently located just 6.6 mi from Ottawa’s city center.

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

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

How can I find direct flights from Ottawa to London?

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

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

Yes. Cheapflights offers flight deals from Ottawa to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£200+ Flights from Ottawa to London - Compare & Save Big

Cheapflights Tip: The best prices from Ottawa to London are usually found in February or March, booked 49 days in advance, depart on a Tuesday or Saturday and return on a Monday

Cheap flight deals from Ottawa to London

Round-trip from	£482
One-way from	£200
Popular in	December
Cheapest in	February
Average price	£533
Good round-trip deal	£541 or less

Porter Airlines
23/6-6/7
2 total stops
32h 46m total
Ottawa to London

Search Deals

18/6
2 total stops
33h 05m total
Ottawa to London

Search Deals

Highest demand for flights based on searches. 5% potential increase in price (£24 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

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

Search Deals

Find flight deals from Ottawa to London

Cheapest flights from Ottawa to London
Explore the most affordable flight options available from Ottawa to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2025.

Tue 3/614:40YOW - LHR

1 stop11h 15mUnited Airlines

Tue 10/607:45LHR - YOW

2 stops13h 58mUnited Airlines

Deal found 28/4£481

Tue 24/616:40YOW - LGW

1 stop10h 15mPorter Airlines

Tue 1/709:40LGW - YOW

1 stop19h 41mPorter Airlines

Deal found 28/4£482

Tue 3/605:55YOW - LGW

1 stop23h 50mMultiple Airlines

Tue 10/612:40LGW - YOW

1 stop16h 42mMultiple Airlines

Deal found 29/4£483

Wed 4/608:20YOW - STN

2 stops31h 35mMultiple Airlines

Sat 7/613:30STN - YOW

2 stops39h 52mMultiple Airlines

Deal found 29/4£496

Wed 4/614:10YOW - LTN

2 stops25h 35mMultiple Airlines

Sat 7/616:10LTN - YOW

2 stops37h 12mMultiple Airlines

Deal found 29/4£500

Mon 23/611:20YOW - LGW

1 stop15h 35mAir Transat

Thu 3/712:40LGW - YOW

1 stop13h 31mAir Transat

Deal found 29/4£509

Wed 4/605:55YOW - LHR

2 stops19h 35mMultiple Airlines

Sat 7/608:30LHR - YOW

1 stop20h 52mMultiple Airlines

Deal found 29/4£512

Thu 8/507:00YOW - LHR

1 stop9h 00mAir Canada

Wed 14/509:30LHR - YOW

1 stop17h 37mAir Canada

Deal found 28/4£538

Sun 11/516:05YOW - LHR

1 stop9h 25mLufthansa

Wed 21/507:25LHR - YOW

2 stops14h 39mLufthansa

Deal found 28/4£552

Wed 10/919:55YOW - LHR

1 stop10h 55mAustrian Airlines

Fri 19/906:00LHR - YOW

2 stops23h 19mAustrian Airlines

Deal found 28/4£556

Thu 8/518:40YOW - LHR

2 stops14h 00mSWISS

Wed 14/507:00LHR - YOW

2 stops18h 17mSWISS

Deal found 28/4£560

Wed 7/515:55YOW - LGW

2 stops21h 00mSWISS

Wed 14/518:35LGW - YOW

2 stops51h 29mSWISS

Deal found 29/4£580

Best flights from Ottawa to London
Discover carefully curated flight deals from Ottawa to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 30 April 2025.

Mon 23/616:40YOW - LGW

1 stop13h 05mPorter Airlines

Sun 6/709:40LGW - YOW

1 stop19h 41mPorter Airlines

Deal found 28/4£482

Tue 3/605:55YOW - LGW

1 stop23h 50mMultiple Airlines

Tue 10/612:40LGW - YOW

1 stop16h 42mMultiple Airlines

Deal found 29/4£483

Sun 15/616:40YOW - LGW

1 stop13h 05mAir Transat

Sat 28/609:40LGW - YOW

1 stop16h 21mAir Transat

Deal found 28/4£485

Fri 16/506:30YOW - LHR

2 stops20h 50mUnited Airlines

Sat 31/507:45LHR - YOW

2 stops31h 13mUnited Airlines

Deal found 29/4£485

Sun 11/516:05YOW - LHR

1 stop9h 25mLufthansa

Wed 21/507:25LHR - YOW

2 stops14h 39mLufthansa

Deal found 29/4£552

Fri 6/615:55YOW - LHR

2 stops13h 05mAir Canada

Mon 16/606:50LHR - YOW

2 stops12h 00mAir Canada

Deal found 29/4£555

Wed 10/919:55YOW - LHR

1 stop10h 55mAustrian Airlines

Fri 19/906:00LHR - YOW

2 stops16h 04mAustrian Airlines

Deal found 29/4£556

Wed 11/605:55YOW - LGW

2 stops22h 30mWestJet

Sat 14/610:45LGW - YOW

2 stops18h 37mWestJet

Deal found 29/4£606

Fri 13/614:40YOW - LHR

2 stops36h 35mSWISS

Fri 20/608:40LHR - YOW

2 stops37h 25mSWISS

Deal found 29/4£617

Tue 20/511:55YOW - LHR

2 stops15h 05mAer Lingus

Tue 27/509:50LHR - YOW

2 stops16h 19mAer Lingus

Deal found 29/4£642

Sat 26/717:15YOW - LHR

1 stop9h 45mAir France

Tue 19/815:25LHR - YOW

2 stops13h 57mAir France

Deal found 29/4£682

Thu 3/717:15YOW - LHR

2 stops15h 35mKLM

Wed 9/706:30LHR - YOW

2 stops13h 35mKLM

Deal found 29/4£817

Direct flights from Ottawa to London
Explore direct flight options from Ottawa to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 30 April 2025.

Mon 1/918:55YOW - LHR

Nonstop6h 35mAir Canada

Mon 22/914:05LHR - YOW

Nonstop7h 20mAir Canada

Deal found 28/4£556

Thu 3/718:55YOW - LHR

Nonstop6h 35mLufthansa

Wed 9/712:40LHR - YOW

Nonstop7h 20mLufthansa

Deal found 29/4£596

Thu 3/718:55YOW - LHR

Nonstop6h 35mMultiple Airlines

Sat 12/712:40LHR - YOW

Nonstop7h 20mMultiple Airlines

Deal found 28/4£634

Last-minute flights from Ottawa to London
Discover last-minute flight deals from Ottawa to London. Data last updated 30 April 2025 and is based on user searches.

Mon 5/518:15YOW - LHR

1 stop12h 10mUnited Airlines

Mon 12/512:15LHR - YOW

1 stop26h 43mUnited Airlines

Deal found 27/4£489

Mon 5/507:00YOW - LGW

1 stop22h 45mAir Transat

Mon 12/512:40LGW - YOW

1 stop16h 41mAir Transat

Deal found 27/4£535

Tue 6/516:40YOW - LGW

1 stop13h 05mPorter Airlines

Tue 13/512:40LGW - YOW

1 stop13h 21mPorter Airlines

Deal found 28/4£533

Tue 6/519:55YOW - LHR

1 stop29h 40mAustrian Airlines

Thu 18/910:25LHR - YOW

2 stops35h 39mAustrian Airlines

Deal found 27/4£556

Tue 6/515:55YOW - LGW

2 stops20h 55mSWISS

Sat 13/918:40LGW - YOW

2 stops33h 24mSWISS

Deal found 28/4£561

Tue 6/509:35YOW - LGW

3 stops24h 05mMultiple Airlines

Tue 13/519:00LGW - YOW

2 stops34h 22mMultiple Airlines

Deal found 28/4£567

Tue 6/515:55YOW - LCY

2 stops15h 35mSWISS

Wed 17/918:05LCY - YOW

2 stops33h 59mSWISS

Deal found 28/4£620

Tue 6/513:55YOW - LHR

2 stops26h 45mAustrian Airlines

Fri 19/906:00LHR - YOW

2 stops16h 04mAustrian Airlines

Deal found 27/4£577

Wed 7/515:55YOW - LGW

2 stops21h 00mSWISS

Wed 14/518:35LGW - YOW

2 stops51h 29mSWISS

Deal found 29/4£580

Thu 8/507:00YOW - LHR

1 stop9h 00mMultiple Airlines

Wed 14/506:00LHR - YOW

2 stops16h 04mMultiple Airlines

Deal found 28/4£532

Thu 8/507:00YOW - LHR

1 stop9h 00mAir Canada

Wed 14/509:30LHR - YOW

1 stop17h 37mAir Canada

Deal found 28/4£538

Thu 8/518:55YOW - LHR

Nonstop6h 35mLufthansa

Wed 14/512:40LHR - YOW

Nonstop7h 30mLufthansa

Deal found 28/4£558

One-way flights from Ottawa to London
Search for one-way flight options from Ottawa to London. Find affordable one-way fares based on user searches. Data last updated 30 April 2025.

Wed 18/605:55YOW - STN

2 stops33h 05mMultiple Airlines

Deal found 28/4£200

Mon 16/605:55YOW - LTN

2 stops30h 00mMultiple Airlines

Deal found 28/4£201

Mon 16/605:55YOW - LGW

2 stops44h 40mMultiple Airlines

Deal found 28/4£206

Wed 4/605:55YOW - LGW

2 stops22h 30mWestJet

Deal found 29/4£229

Wed 18/605:55YOW - LHR

2 stops34h 50mMultiple Airlines

Deal found 29/4£233

Mon 16/605:55YOW - LCY

2 stops31h 35mMultiple Airlines

Deal found 28/4£254

Wed 18/605:55YOW - SEN

3 stops50h 10mMultiple Airlines

Deal found 28/4£262

Wed 2/718:10YOW - LHR

1 stop21h 50mAir Canada

Deal found 28/4£313

Mon 28/718:55YOW - LHR

Nonstop6h 35mLufthansa

Deal found 29/4£315

Fri 15/811:20YOW - LGW

1 stop15h 35mPorter Airlines

Deal found 28/4£333

Fri 4/705:15YOW - LHR

2 stops24h 25mUnited Airlines

Deal found 29/4£340

Wed 15/1014:20YOW - LGW

1 stop15h 25mAir Transat

Deal found 29/4£343

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 3/6

14:40-06:55

1 stop11h 15m

London Heathrow

Tue 10/6

07:45-16:43

2 stops13h 58m

£481

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Mon 23/6

16:40-10:45

1 stop13h 05m

London Gatwick

Sun 6/7

09:40-00:21

1 stop19h 41m

£482

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Tue 3/6

05:55-10:45

1 stop23h 50m

London Gatwick

Tue 10/6

12:40-00:22

1 stop16h 42m

£483

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Sun 15/6

16:40-10:45

1 stop13h 05m

London Gatwick

Sat 28/6

09:40-21:01

1 stop16h 21m

£485

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Wed 4/6

08:20-20:55

2 stops31h 35m

London Stansted

Sat 7/6

13:30-00:22

2 stops39h 52m

£496

OttawaLondon

YOW - LTN

YOWLTN

Ottawa

Wed 4/6

14:10-20:45

2 stops25h 35m

London Luton

Sat 7/6

16:10-00:22

2 stops37h 12m

£500

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 4/6

05:55-06:30

2 stops19h 35m

London Heathrow

Sat 7/6

08:30-00:22

1 stop20h 52m

£512

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 15/6

18:40-09:35

1 stop9h 55m

London Heathrow

Mon 23/6

14:05-16:25

Nonstop7h 20m

£547

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 11/5

16:05-06:30

1 stop9h 25m

London Heathrow

Wed 21/5

07:25-17:04

2 stops14h 39m

£552

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 10/9

19:55-11:50

1 stop10h 55m

London Heathrow

Fri 19/9

06:00-00:19

2 stops23h 19m

£556

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 40 results

Best time to book a flight from Ottawa to London

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

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

The price you pay for your flight from Ottawa to London may vary depending on when you book. For the best chance of a lower fare, look to book 49 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 Ottawa to London?

Currently, January is the cheapest month in which you can book a flight from Ottawa to London (average of £112). Flying from Ottawa to London in August is currently the most expensive (average of £164). 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 LON?

It’s typically best to fly out from Ottawa to London in the afternoon. Doing so could potentially save you 21% on the flight price compared to flying at midday, which is usually more expensive.

Rainfall in London by month

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Temperature in London by month

If weather is an important factor for your trip to London, 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 London

Read reviews from past customers who have flown Porter Airlines, KLM and Air Transat from Ottawa to London. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Porter Airlines

8.0

Very Good

285 reviews

Check prices

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

Porter Airlines

8.0

Very Good

285 reviews

Porter Airlines

8.0

Very Good

285 reviews

Check prices

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

KLM

7.8

Good

1,334 reviews

Porter Airlines

8.0

Very Good

285 reviews

Check prices

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

Air Transat

7.8

Good

385 reviews

Porter Airlines

8.0

Very Good

285 reviews

Check prices

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

Austrian Airlines

7.6

Good

780 reviews

Porter Airlines

8.0

Very Good

285 reviews

Check prices

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

SWISS

7.5

Good

1,588 reviews

Porter Airlines

8.0

Very Good

285 reviews

Check prices

Reviews

1 / 18

10.0

Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

Related info for your journey

What airport do you fly from for flights from Ottawa to London?
Most people fly from Ottawa (YOW) if they book a flight from Ottawa to London. On average, Ottawa has 1 outbound flight to London per day from 2 airlines. Ottawa is conveniently located just 6.6 mi from Ottawa’s city center.
What are the cheapest airlines flying from Ottawa to London round-trip?
Cheapflights users have booked flights from Ottawa to London round-trip from £482. Other airlines that can offer you cheap pricing are Air Transat, from £485, and United Airlines, from £485. Porter Airlines is priced at 15% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from Ottawa to London one-way?
£229 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and Lufthansa, with prices starting from £313 and £315, respectively.
What are the most popular routes from Ottawa to London?
While some choose either Ottawa - London Gatwick or Ottawa - London City, Ottawa - London Heathrow is the most popular route from Ottawa to London.
What are the most reliable airlines from Ottawa to London?
The top 3 most reliable airlines when flying from Ottawa to London are Air Canada (89%), Aegean Airlines (89%) and Austrian Airlines (89%).
What are the cheapest flights from Ottawa to London?
While on average a flight from Ottawa to London is generally £542, our data shows the cheapest flight currently is £488. When looking at the most popular route, (Ottawa - London Heathrow), you can expect to pay £475 for that flight.
Can I find deals for flights from Ottawa to London that include hotel bookings?
Yes. In addition to deals on Ottawa to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Ottawa to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to London.
Can I find deals for business class flights from Ottawa to London?
Yes. Cheapflights offers flight deals from Ottawa to London 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?
Currently, January is the cheapest month in which you can book a flight from Ottawa to London (average of £112). Flying from Ottawa to London in August is currently the most expensive (average of £164). 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

Deal

Hounslow

Milton Keynes

Gatwick

Luton

Slough

Croydon

Eastbourne

Ilford

Hayes

Southend-on-Sea

Crawley

Wembley

Ipswich

Maidstone

Winchester

Folkestone

Dartford

Watford

Chichester

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Ottawa to London

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest£480	Average£604	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Porter Airlines	Cheapest£543	Average£591	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights

Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to London from Ottawa today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Ottawa to London?

Cheapflights helps you find that perfect flight to London from Ottawa 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 Ottawa to London with no change fees?

Yes, we can. To see specific flights from Ottawa to London 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 London become cheaper?

Not ready to book yet? You can track prices for flights from Ottawa to London on Cheapflights with our Price Alert feature and get notified when better prices are available.

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

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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.

Cheap flights from Ottawa to London from £200

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 18/6. 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 are usually found in February or March, booked 49 days in advance, depart on a Tuesday or Saturday and return on a Monday

Cheap flight deals from Ottawa to London

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Find flight deals from Ottawa to London

Cheapest flights from Ottawa to LondonExplore the most affordable flight options available from Ottawa to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2025.

Explore the most affordable flight options available from Ottawa to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Ottawa to London

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

Cheapflights Insights

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

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

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

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

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

Find hourly flight availability from Ottawa to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 April 2025.

Rainfall in London by month

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

Temperature in London by month

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

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 30 April 2025.

Read reviews from past customers who have flown Porter Airlines, KLM and Air Transat from Ottawa to London. You can also see how each airline stacks up 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 London. 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?

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

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

What are the most popular routes from Ottawa to London?

What are the most reliable airlines from Ottawa to London?

What are the cheapest flights from Ottawa to London?

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

How can I find direct flights from Ottawa to London?

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

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

Travelling to a place near Ottawa?

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 Ottawa to London

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

Top 2 airlines flying from Ottawa to London

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Why should you use Cheapflights to find cheap flight tickets from Ottawa to London?

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

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

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Ottawa to London
Explore the most affordable flight options available from Ottawa to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2025.