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

Cheapflights users have booked flights from Ottawa to London round-trip from £502. Other airlines that can offer you cheap pricing are Air Canada, from £505, and SWISS, from £515. Lufthansa is priced at 16% 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?

£313 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Porter Airlines and Air Transat, with prices starting from £339 and £346, 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 £545, our data shows the cheapest flight currently is £498. When looking at the most popular route, (Ottawa - London Heathrow), you can expect to pay £464 for that flight.

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 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 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 £550, or £662 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 £601 for the month, but tickets can be as low as £444. 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 0 outbound flights 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.

£173+ Flights from Ottawa to London

Cheapflights Tip: The best prices from Ottawa to London are usually found in February or January, booked 86 days in advance, depart on a Tuesday or Saturday and return on a Monday

Cheap flight deals from Ottawa to London

Round-trip from	£502
One-way from	£173
Popular in	December
Cheapest in	February
Average price	£559
Good round-trip deal	£544 or less

Lufthansa
8/9-12/9
2 total stops
20h 09m total
Ottawa to London

Search Deals

8/4
1 total stop
19h 35m total
Ottawa to London

Search Deals

Highest demand for flights based on searches. 3% potential increase in price (£16 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).

Search Deals

Average for round-trip flights in March 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 26 March 2025.

Wed 24/914:25YOW - LHR

1 stop11h 05mMultiple Airlines

Wed 1/1007:00LHR - YOW

2 stops18h 14mMultiple Airlines

Deal found 25/3£502

Sat 3/505:55YOW - LGW

1 stop23h 50mMultiple Airlines

Fri 9/512:40LGW - YOW

1 stop16h 42mMultiple Airlines

Deal found 25/3£504

Sat 24/507:00YOW - LHR

1 stop9h 00mAir Canada

Sun 31/809:30LHR - YOW

1 stop14h 30mAir Canada

Deal found 25/3£505

Sat 10/521:00YOW - LHR

Nonstop6h 35mLufthansa

Mon 26/514:05LHR - YOW

Nonstop7h 30mLufthansa

Deal found 25/3£506

Tue 8/414:10YOW - LGW

2 stops22h 40mSWISS

Tue 15/418:35LGW - YOW

2 stops51h 49mSWISS

Deal found 25/3£515

Tue 8/416:00YOW - LHR

2 stops20h 50mSWISS

Tue 15/420:05LHR - YOW

2 stops50h 19mSWISS

Deal found 25/3£518

Thu 5/608:20YOW - STN

2 stops30h 05mMultiple Airlines

Mon 23/617:20STN - YOW

3 stops36h 02mMultiple Airlines

Deal found 25/3£529

Thu 5/616:40YOW - LGW

1 stop13h 05mPorter Airlines

Mon 23/612:40LGW - YOW

1 stop13h 21mPorter Airlines

Deal found 25/3£533

Sat 3/510:25YOW - LHR

2 stops15h 20mUnited Airlines

Sat 10/507:25LHR - YOW

2 stops21h 28mUnited Airlines

Deal found 25/3£536

Wed 7/515:55YOW - LCY

2 stops21h 50mSWISS

Thu 15/513:05LCY - YOW

2 stops56h 59mSWISS

Deal found 25/3£536

Mon 12/514:20YOW - LGW

1 stop15h 25mAir Transat

Sat 17/512:40LGW - YOW

1 stop16h 41mAir Transat

Deal found 25/3£543

Thu 5/608:20YOW - LTN

2 stops33h 00mMultiple Airlines

Mon 23/619:50LTN - YOW

3 stops33h 32mMultiple Airlines

Deal found 25/3£548

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 26 March 2025.

Mon 8/918:55YOW - LHR

Nonstop6h 35mLufthansa

Fri 12/913:30LHR - YOW

2 stops13h 34mLufthansa

Deal found 25/3£502

Tue 22/416:45YOW - LHR

1 stop8h 45mMultiple Airlines

Tue 29/408:45LHR - YOW

2 stops15h 34mMultiple Airlines

Deal found 25/3£502

Thu 29/518:55YOW - LHR

Nonstop6h 35mAir Canada

Sat 7/606:50LHR - YOW

2 stops23h 44mAir Canada

Deal found 25/3£505

Tue 8/414:10YOW - LGW

2 stops22h 40mSWISS

Tue 15/418:35LGW - YOW

2 stops51h 49mSWISS

Deal found 25/3£515

Thu 5/616:40YOW - LGW

1 stop13h 05mPorter Airlines

Mon 23/612:40LGW - YOW

1 stop13h 21mPorter Airlines

Deal found 25/3£533

Sat 3/510:25YOW - LHR

2 stops15h 50mUnited Airlines

Sat 10/507:25LHR - YOW

2 stops16h 27mUnited Airlines

Deal found 25/3£535

Mon 12/514:20YOW - LGW

1 stop15h 25mAir Transat

Sat 17/512:40LGW - YOW

1 stop16h 41mAir Transat

Deal found 25/3£543

Sun 25/517:15YOW - LHR

2 stops12h 30mKLM

Sat 7/606:30LHR - YOW

2 stops13h 35mKLM

Deal found 25/3£567

Thu 22/515:55YOW - LHR

2 stops24h 00mBrussels Airlines

Mon 26/506:50LHR - YOW

2 stops11h 55mBrussels Airlines

Deal found 25/3£587

Tue 13/505:55YOW - LGW

2 stops22h 30mWestJet

Sun 18/510:45LGW - YOW

2 stops18h 37mWestJet

Deal found 25/3£604

Mon 28/711:55YOW - LHR

2 stops15h 05mAer Lingus

Mon 11/809:50LHR - YOW

2 stops16h 20mAer Lingus

Deal found 24/3£655

Fri 9/505:55YOW - LHR

2 stops19h 30mDelta

Mon 26/518:50LHR - YOW

2 stops34h 32mDelta

Deal found 25/3£702

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 26 March 2025.

Sat 3/521:00YOW - LHR

Nonstop6h 35mAir Canada

Sat 10/512:40LHR - YOW

Nonstop7h 30mAir Canada

Deal found 25/3£506

Thu 8/518:55YOW - LHR

Nonstop6h 35mLufthansa

Mon 26/514:05LHR - YOW

Nonstop7h 30mLufthansa

Deal found 25/3£506

Thu 3/718:55YOW - LHR

Nonstop6h 35mMultiple Airlines

Sat 12/712:40LHR - YOW

Nonstop7h 30mMultiple Airlines

Deal found 25/3£599

Last-minute flights from Ottawa to London
Discover last-minute flight deals from Ottawa to London. Data last updated 26 March 2025 and is based on user searches.

Tue 25/318:20YOW - LHR

1 stop18h 15mAir France

Tue 1/409:00LHR - YOW

1 stop11h 05mAir France

Deal found 25/3£626

Tue 25/318:20YOW - LHR

2 stops15h 30mKLM

Tue 1/406:30LHR - YOW

2 stops13h 35mKLM

Deal found 25/3£666

Mon 31/314:50YOW - LGW

1 stop14h 55mAir Transat

Thu 10/412:40LGW - YOW

1 stop24h 40mAir Transat

Deal found 25/3£554

Mon 31/316:45YOW - LHR

1 stop12h 15mLufthansa

Wed 9/409:30LHR - YOW

1 stop10h 37mLufthansa

Deal found 25/3£570

Mon 31/317:15YOW - LTN

1 stop11h 00mMultiple Airlines

Mon 7/411:00LTN - YOW

2 stops18h 09mMultiple Airlines

Deal found 25/3£717

Mon 31/317:15YOW - LHR

1 stop9h 45mVirgin Atlantic

Mon 7/417:50LHR - YOW

1 stop11h 19mVirgin Atlantic

Deal found 25/3£771

Mon 31/317:15YOW - LHR

1 stop18h 20mAir France

Wed 9/415:20LHR - YOW

2 stops13h 49mAir France

Deal found 25/3£777

Tue 1/413:00YOW - LHR

1 stop12h 30mAir Canada

Sun 6/414:05LHR - YOW

1 stop24h 31mAir Canada

Deal found 25/3£506

Tue 1/409:25YOW - LGW

1 stop19h 35mMultiple Airlines

Thu 10/412:40LGW - YOW

1 stop30h 24mMultiple Airlines

Deal found 25/3£547

Wed 2/414:45YOW - LHR

1 stop10h 45mMultiple Airlines

Mon 7/408:30LHR - YOW

1 stop13h 54mMultiple Airlines

Deal found 25/3£513

Wed 2/416:00YOW - LHR

2 stops19h 25mSWISS

Tue 8/419:15LHR - YOW

2 stops28h 42mSWISS

Deal found 25/3£542

Wed 2/416:00YOW - LCY

2 stops20h 15mMultiple Airlines

Mon 7/419:10LCY - YOW

2 stops27h 14mMultiple Airlines

Deal found 25/3£688

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 26 March 2025.

Tue 8/409:25YOW - LGW

1 stop19h 35mMultiple Airlines

Deal found 25/3£173

Sun 6/705:55YOW - STN

2 stops32h 35mMultiple Airlines

Deal found 25/3£226

Tue 27/505:55YOW - LHR

2 stops35h 40mMultiple Airlines

Deal found 25/3£230

Sun 15/605:55YOW - LTN

2 stops32h 30mMultiple Airlines

Deal found 25/3£291

Tue 8/705:55YOW - LCY

2 stops25h 10mMultiple Airlines

Deal found 25/3£312

Sat 5/705:55YOW - LGW

2 stops22h 30mWestJet

Deal found 25/3£313

Fri 23/506:00YOW - LHR

1 stop25h 05mWestJet

Deal found 25/3£333

Fri 9/516:40YOW - LGW

1 stop13h 05mPorter Airlines

Deal found 24/3£339

Sun 15/614:10YOW - SEN

2 stops24h 25mMultiple Airlines

Deal found 25/3£342

Fri 25/410:40YOW - LGW

1 stop19h 05mAir Transat

Deal found 25/3£346

Mon 7/713:55YOW - LHR

2 stops14h 10mAer Lingus

Deal found 25/3£349

Wed 23/421:00YOW - LHR

Nonstop6h 35mLufthansa

Deal found 25/3£529

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

Mon 8/9

18:55-06:30

Nonstop6h 35m

London Heathrow

Fri 12/9

13:30-22:04

2 stops13h 34m

£502

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 22/4

16:45-06:30

1 stop8h 45m

London Heathrow

Tue 29/4

08:45-19:19

2 stops15h 34m

£502

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Sat 3/5

05:55-10:45

1 stop23h 50m

London Gatwick

Fri 9/5

12:40-00:22

1 stop16h 42m

£504

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 29/5

18:55-06:30

Nonstop6h 35m

London Heathrow

Sat 7/6

06:50-01:34

2 stops23h 44m

£505

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Tue 8/4

14:10-17:50

2 stops22h 40m

London Gatwick

Tue 15/4

18:35-17:24

2 stops51h 49m

£515

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 7/5

15:55-16:25

2 stops19h 30m

London Heathrow

Fri 16/5

06:00-21:09

2 stops20h 09m

£516

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Thu 5/6

08:20-19:25

2 stops30h 05m

London Stansted

Mon 23/6

17:20-00:22

3 stops36h 02m

£529

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Thu 5/6

16:40-10:45

1 stop13h 05m

London Gatwick

Mon 23/6

12:40-21:01

1 stop13h 21m

£533

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 3/5

10:25-07:15

2 stops15h 50m

London Heathrow

Sat 10/5

07:25-18:52

2 stops16h 27m

£535

OttawaLondon

YOW - LCY

YOWLCY

Ottawa

Wed 7/5

15:55-18:45

2 stops21h 50m

London City

Thu 15/5

13:05-17:04

2 stops56h 59m

£536

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Showing 1-10 of 41 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 86 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 Delta, Porter Airlines and KLM 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.

Delta

8.0

Very Good

7,891 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very Good

7,891 reviews

Delta

8.0

Very Good

7,891 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Porter Airlines

7.9

Good

276 reviews

Delta

8.0

Very Good

7,891 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,318 reviews

Delta

8.0

Very Good

7,891 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air Transat

7.8

Good

381 reviews

Delta

8.0

Very Good

7,891 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS

7.5

Good

1,569 reviews

Delta

8.0

Very Good

7,891 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 0 outbound flights 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 £502. Other airlines that can offer you cheap pricing are Air Canada, from £505, and SWISS, from £515. Lufthansa is priced at 16% 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?
£313 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Porter Airlines and Air Transat, with prices starting from £339 and £346, 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 cheapest flights from Ottawa to London?
While on average a flight from Ottawa to London is generally £545, our data shows the cheapest flight currently is £498. When looking at the most popular route, (Ottawa - London Heathrow), you can expect to pay £464 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

Croydon

Luton

Slough

Eastbourne

Wembley

Hayes

Ilford

Crawley

Southend-on-Sea

Winchester

Maidstone

Ipswich

Watford

Southall

Dartford

Folkestone

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£498	Average£633	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Porter Airlines	Cheapest£563	Average£613	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 £173

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 8/4. 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 January, booked 86 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 26 March 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 26 March 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 21 March 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 26 March 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 26 March 2025.

Read reviews from past customers who have flown Delta, Porter Airlines and KLM 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 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 26 March 2025.