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

Cheapflights users have booked flights from Ottawa to London round-trip from £487. Other airlines that can offer you cheap pricing are Virgin Atlantic, from £490, and Air Transat, from £491. 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?

£217 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Aer Lingus and Porter Airlines, with prices starting from £330 and £335, 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 £550, our data shows the cheapest flight currently is £495. When looking at the most popular route, (Ottawa - London Heathrow), you can expect to pay £481 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 (100%), Aegean Airlines (100%) and Austrian Airlines (100%).

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 36 days in advance to save up to 1% 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 36 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 £520, or £520 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 £580 for the month, but tickets can be as low as £435. 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.

£199+ Flights from Ottawa to London

Cheapflights Tip: The best prices from Ottawa to London are usually found in February or March, booked 62 days in advance, depart on a Tuesday or Saturday and return on a Monday

Cheap flight deals from Ottawa to London

Round-trip from	£486
One-way from	£199
Popular in	December
Cheapest in	February
Average price	£540
Good round-trip deal	£539 or less

16/5-6/6
4 total stops
64h 42m total
Ottawa to London

Search Deals

27/5
2 total stops
29h 40m total
Ottawa to London

Search Deals

Highest demand for flights based on searches. 5% potential increase in price (£23 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 15 April 2025.

Fri 16/505:55YOW - LGW

2 stops46h 55mMultiple Airlines

Fri 6/611:35LGW - YOW

2 stops17h 47mMultiple Airlines

Deal found 15/4£486

Tue 24/611:20YOW - LGW

1 stop18h 25mPorter Airlines

Mon 30/609:40LGW - YOW

1 stop16h 31mPorter Airlines

Deal found 15/4£487

Thu 9/1017:15YOW - LHR

1 stop9h 45mVirgin Atlantic

Wed 29/1006:20LHR - YOW

1 stop13h 50mVirgin Atlantic

Deal found 15/4£490

Mon 2/607:00YOW - LGW

1 stop22h 45mAir Transat

Mon 30/609:40LGW - YOW

1 stop29h 41mAir Transat

Deal found 15/4£491

Thu 12/605:55YOW - STN

2 stops32h 30mMultiple Airlines

Thu 19/606:50STN - YOW

2 stops22h 32mMultiple Airlines

Deal found 14/4£491

Thu 9/1018:40YOW - LHR

1 stop10h 20mMultiple Airlines

Wed 29/1008:55LHR - YOW

2 stops16h 22mMultiple Airlines

Deal found 15/4£495

Thu 9/1018:55YOW - LHR

Nonstop6h 35mAir Canada

Tue 28/1006:50LHR - YOW

2 stops12h 58mAir Canada

Deal found 15/4£496

Thu 9/1010:25YOW - LHR

1 stop19h 15mUnited Airlines

Fri 31/1008:55LHR - YOW

2 stops18h 48mUnited Airlines

Deal found 15/4£496

Mon 6/1015:55YOW - LCY

2 stops20h 20mSWISS

Tue 21/1013:05LCY - YOW

2 stops57h 14mSWISS

Deal found 13/4£509

Tue 7/1015:55YOW - LGW

2 stops20h 55mSWISS

Tue 21/1018:35LGW - YOW

2 stops29h 29mSWISS

Deal found 15/4£512

Tue 7/1018:40YOW - LHR

1 stop10h 20mLufthansa

Wed 22/1009:30LHR - YOW

1 stop9h 15mLufthansa

Deal found 15/4£521

Fri 10/1018:40YOW - LHR

2 stops32h 35mSWISS

Tue 21/1008:45LHR - YOW

2 stops15h 19mSWISS

Deal found 15/4£526

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 15 April 2025.

Fri 16/505:55YOW - LGW

2 stops46h 55mMultiple Airlines

Fri 6/611:35LGW - YOW

2 stops17h 47mMultiple Airlines

Deal found 15/4£486

Tue 24/611:20YOW - LGW

1 stop18h 25mPorter Airlines

Mon 30/609:40LGW - YOW

1 stop16h 31mPorter Airlines

Deal found 15/4£487

Thu 9/1017:15YOW - LHR

1 stop9h 45mVirgin Atlantic

Wed 29/1006:20LHR - YOW

1 stop13h 50mVirgin Atlantic

Deal found 15/4£490

Mon 2/607:00YOW - LGW

1 stop22h 45mAir Transat

Mon 30/609:40LGW - YOW

1 stop29h 41mAir Transat

Deal found 15/4£491

Thu 9/1018:55YOW - LHR

Nonstop6h 35mAir Canada

Tue 28/1006:50LHR - YOW

2 stops12h 58mAir Canada

Deal found 15/4£496

Thu 9/1010:25YOW - LHR

1 stop19h 15mUnited Airlines

Fri 31/1008:55LHR - YOW

2 stops18h 48mUnited Airlines

Deal found 15/4£496

Tue 7/1015:55YOW - LGW

2 stops20h 55mSWISS

Tue 21/1018:35LGW - YOW

2 stops29h 29mSWISS

Deal found 15/4£512

Tue 7/1016:00YOW - LHR

1 stop9h 30mLufthansa

Mon 20/1009:30LHR - YOW

1 stop9h 15mLufthansa

Deal found 15/4£521

Thu 9/1017:15YOW - LHR

2 stops12h 30mKLM

Thu 30/1006:30LHR - YOW

2 stops13h 40mKLM

Deal found 15/4£536

Thu 9/1011:55YOW - LHR

2 stops15h 05mAer Lingus

Wed 29/1008:50LHR - YOW

2 stops16h 27mAer Lingus

Deal found 15/4£539

Wed 4/616:05YOW - LHR

2 stops13h 10mBrussels Airlines

Mon 9/606:50LHR - YOW

2 stops12h 00mBrussels Airlines

Deal found 14/4£539

Wed 4/605:55YOW - LGW

2 stops22h 30mWestJet

Mon 9/610:35LGW - YOW

2 stops18h 47mWestJet

Deal found 14/4£585

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 15 April 2025.

Wed 7/521:00YOW - LHR

Nonstop6h 35mAir Canada

Wed 14/512:40LHR - YOW

Nonstop7h 30mAir Canada

Deal found 15/4£510

Thu 1/518:55YOW - LHR

Nonstop6h 35mMultiple Airlines

Mon 5/514:05LHR - YOW

Nonstop7h 30mMultiple Airlines

Deal found 15/4£515

Wed 8/1021:00YOW - LHR

Nonstop6h 35mLufthansa

Mon 20/1014:05LHR - YOW

Nonstop7h 20mLufthansa

Deal found 15/4£521

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

Mon 21/419:29YOW - LHR

1 stop10h 11mUnited Airlines

Fri 25/407:45LHR - YOW

2 stops13h 58mUnited Airlines

Deal found 15/4£502

Mon 21/419:29YOW - LHR

1 stop10h 11mMultiple Airlines

Mon 28/414:05LHR - YOW

Nonstop7h 30mMultiple Airlines

Deal found 15/4£548

Mon 21/411:00YOW - LHR

2 stops24h 25mSWISS

Fri 25/406:00LHR - YOW

2 stops18h 19mSWISS

Deal found 15/4£986

Wed 23/416:55YOW - LGW

2 stops16h 05mMultiple Airlines

Sat 24/510:45LGW - YOW

1 stop33h 00mMultiple Airlines

Deal found 15/4£736

Thu 24/417:35YOW - LHR

1 stop22h 25mAir Canada

Thu 1/514:05LHR - YOW

Nonstop7h 30mAir Canada

Deal found 14/4£527

Thu 24/417:05YOW - LGW

1 stop12h 40mPorter Airlines

Thu 1/512:40LGW - YOW

1 stop13h 21mPorter Airlines

Deal found 14/4£708

Thu 24/414:10YOW - LCY

2 stops22h 05mSWISS

Thu 1/509:25LCY - YOW

2 stops36h 39mSWISS

Deal found 14/4£840

Mon 28/416:45YOW - LHR

1 stop12h 15mLufthansa

Thu 8/506:55LHR - YOW

2 stops15h 09mLufthansa

Deal found 15/4£522

Thu 1/519:00YOW - LHR

2 stops10h 00mMultiple Airlines

Mon 5/506:00LHR - YOW

2 stops18h 04mMultiple Airlines

Deal found 15/4£505

Thu 1/513:55YOW - LHR

1 stop11h 40mAir Canada

Wed 7/514:05LHR - YOW

1 stop13h 02mAir Canada

Deal found 15/4£509

Thu 1/516:40YOW - LGW

1 stop13h 05mPorter Airlines

Wed 7/512:40LGW - YOW

1 stop13h 21mPorter Airlines

Deal found 15/4£515

Sun 4/518:15YOW - LHR

1 stop12h 10mUnited Airlines

Sun 11/509:00LHR - YOW

2 stops29h 58mUnited Airlines

Deal found 14/4£499

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 15 April 2025.

Tue 27/505:55YOW - STN

2 stops29h 40mMultiple Airlines

Deal found 14/4£199

Sun 15/605:55YOW - LTN

2 stops36h 00mMultiple Airlines

Deal found 15/4£216

Tue 17/605:55YOW - LGW

2 stops22h 30mWestJet

Deal found 15/4£217

Sun 15/605:55YOW - LGW

2 stops35h 55mMultiple Airlines

Deal found 15/4£222

Wed 28/505:55YOW - LHR

2 stops34h 50mMultiple Airlines

Deal found 15/4£233

Tue 27/505:55YOW - SEN

3 stops32h 45mMultiple Airlines

Deal found 14/4£300

Sun 1/605:55YOW - LCY

2 stops32h 25mMultiple Airlines

Deal found 15/4£315

Sun 4/509:20YOW - LHR

2 stops17h 40mAer Lingus

Deal found 15/4£330

Tue 15/714:20YOW - LGW

1 stop12h 35mPorter Airlines

Deal found 15/4£335

Sun 20/717:05YOW - LGW

1 stop12h 40mAir Transat

Deal found 15/4£344

Mon 21/707:50YOW - LHR

1 stop23h 15mWestJet

Deal found 15/4£355

Mon 21/718:55YOW - LHR

Nonstop6h 35mLufthansa

Deal found 15/4£382

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 - LGW

YOWLGW

Ottawa

Fri 16/5

05:55-09:50

2 stops46h 55m

London Gatwick

Fri 6/6

11:35-00:22

2 stops17h 47m

£486

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Tue 24/6

11:20-10:45

1 stop18h 25m

London Gatwick

Mon 30/6

09:40-21:11

1 stop16h 31m

£487

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 9/10

17:15-08:00

1 stop9h 45m

London Heathrow

Wed 29/10

06:20-16:10

1 stop13h 50m

£490

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Mon 2/6

07:00-10:45

1 stop22h 45m

London Gatwick

Mon 30/6

09:40-10:21

1 stop29h 41m

£491

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Thu 12/6

05:55-19:25

2 stops32h 30m

London Stansted

Thu 19/6

06:50-00:22

2 stops22h 32m

£491

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 9/10

18:40-10:00

1 stop10h 20m

London Heathrow

Wed 29/10

08:55-21:17

2 stops16h 22m

£495

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 9/10

18:55-06:30

Nonstop6h 35m

London Heathrow

Tue 28/10

06:50-15:48

2 stops12h 58m

£496

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 9/10

10:25-10:40

1 stop19h 15m

London Heathrow

Fri 31/10

08:55-23:43

2 stops18h 48m

£496

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Tue 7/10

15:55-17:50

2 stops20h 55m

London Gatwick

Tue 21/10

18:35-19:04

2 stops29h 29m

£512

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 7/10

16:00-06:30

1 stop9h 30m

London Heathrow

Mon 20/10

09:30-13:45

1 stop9h 15m

£521

Flights are sorted by cheapest return flights first.

Deals found on 14/4

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 62 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

281 reviews

Check prices

Reviews

1 / 17

10.0

Excellent

Anonymous,Dec 2024

YYZ - LAS

Everything about the rescheduled (cost me $180) flight great. ***Being denied boarding because I was few minutes under 1.5 hours was not. Stuck at the Kiosk for about 15 minutes before it directed me to the Porter counter was strange. Do not know why checking in online at home was not successful? I think something was up...what can you do?

Porter Airlines

8.0

Very Good

281 reviews

Porter Airlines

8.0

Very Good

281 reviews

Check prices

Reviews

1 / 17

10.0

Excellent

Anonymous,Dec 2024

YYZ - LAS

KLM

7.8

Good

1,323 reviews

Porter Airlines

8.0

Very Good

281 reviews

Check prices

Reviews

1 / 17

10.0

Excellent

Anonymous,Dec 2024

YYZ - LAS

Air Transat

7.8

Good

385 reviews

Porter Airlines

8.0

Very Good

281 reviews

Check prices

Reviews

1 / 17

10.0

Excellent

Anonymous,Dec 2024

YYZ - LAS

Austrian Airlines

7.6

Good

775 reviews

Porter Airlines

8.0

Very Good

281 reviews

Check prices

Reviews

1 / 17

10.0

Excellent

Anonymous,Dec 2024

YYZ - LAS

SWISS

7.5

Good

1,578 reviews

Porter Airlines

8.0

Very Good

281 reviews

Check prices

Reviews

1 / 17

10.0

Excellent

Anonymous,Dec 2024

YYZ - LAS

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 £487. Other airlines that can offer you cheap pricing are Virgin Atlantic, from £490, and Air Transat, from £491. 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?
£217 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Aer Lingus and Porter Airlines, with prices starting from £330 and £335, 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 (100%), Aegean Airlines (100%) and Austrian Airlines (100%).
What are the cheapest flights from Ottawa to London?
While on average a flight from Ottawa to London is generally £550, our data shows the cheapest flight currently is £495. When looking at the most popular route, (Ottawa - London Heathrow), you can expect to pay £481 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

Hounslow

Deal

Milton Keynes

Gatwick

Luton

Slough

Croydon

Eastbourne

Wembley

Hayes

Crawley

Southend-on-Sea

Maidstone

Ipswich

Southall

Ilford

Winchester

Folkestone

Dartford

Watford

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£487	Average£620	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Porter Airlines	Cheapest£551	Average£600	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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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 £199

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 27/5. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Ottawa to London are usually found in February or March, booked 62 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 15 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 15 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 11 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 15 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 15 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 15 April 2025.