Which airlines fly to London?

Virgin Atlantic, British Airways and Iberia are the top three most popular airlines that fly to London from Ontario according to our data. Virgin Atlantic is the first choice among our users, with 48% of people opting to fly with this airline when travelling to London. Keep in mind that there are 13 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Ontario to London?

United Airlines, Iberia, and Delta are the most popular carriers operating from Ontario to London

When did momondo last update prices for flights from Ontario Airport to London?

Prices for flights from Ontario Airport to London refresh daily.

How old do you have to be to fly from Ontario Airport to London?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to London.

What documentation or ID do you need to fly to London?

The travel and health documents you'll need for your trip to London may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

£257 Cheap Flights from Ontario to London in 2025/26

Q: What is the typical price of a round-trip flight between Ontario and London?

Prices are currently low for flights on this route. Typical prices usually range from £516 to £767. The lowest price recently found on this route was £446.

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Find the cheapest flights from Ontario to London

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16:45 - 13:15ONT-LHR

12h 30m1 stop

15:00 - 22:48LHR-ONT

15h 48m1 stop

£446British Airways

Find Deal

Tue, 20 Jan - Tue, 3 Feb

06:40 - 10:30ONT-LHR

19h 50m1 stop

14:45 - 22:49LHR-ONT

16h 04m1 stop

£451KLM

Find Deal

Mon, 8 Dec - Tue, 23 Dec

13:15 - 11:40ONT-LHR

14h 25m1 stop

14:30 - 22:34LHR-ONT

15h 04m1 stop

£454Virgin Atlantic

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Tue, 24 Feb - Tue, 17 Mar

07:30 - 11:55ONT-LHR

20h 25m1 stop

06:30 - 22:51LHR-ONT

24h 21m2 stops

£455Virgin Atlantic

Find Deal

Mon, 12 Jan - Sat, 31 Jan

10:58 - 08:35ONT-LHR

13h 37m1 stop

15:00 - 22:48LHR-ONT

15h 48m1 stop

£458Iberia

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Sun, 11 Jan - Tue, 27 Jan

12:41 - 20:10ONT-LHR

23h 29m2 stops

20:00 - 11:31LHR-ONT

23h 31m2 stops

£460Delta

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Tue, 6 Jan - Tue, 13 Jan

11:55 - 09:00ONT-LHR

13h 05m1 stop

09:55 - 22:40LHR-ONT

20h 45m2 stops

£464Delta

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Wed, 15 Apr - Tue, 5 May

07:10 - 08:50ONT-LCY

17h 40m2 stops

07:50 - 23:59LCY-ONT

23h 09m2 stops

£503Iberia

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Thu, 5 Mar - Thu, 12 Mar

07:16 - 09:00ONT-LGW

17h 44m2 stops

12:30 - 10:08LGW-ONT

53h 38m2 stops

£610American Airlines

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Wed, 28 Jan - Sun, 1 Feb

06:00 - 09:00ONT-LGW

19h 00m2 stops

11:20 - 18:45LGW-ONT

39h 25m2 stops

£629American Airlines

Find Deal

Wed, 28 Jan - Sun, 1 Feb

British Airways flights from Ontario to London

Our best British Airways deals on Ontario to London flight tickets

British Airways

20 Jan

ONT16:45Ontario

12h 30m

1 stop

LHR13:15London Heathrow

3 Feb

LHR15:00London Heathrow

15h 48m

1 stop

ONT22:48Ontario

£446

Find similar

British Airways

2 Dec

ONT15:19Ontario

12h 56m

1 stop

LHR12:15London Heathrow

9 Dec

LHR15:00London Heathrow

15h 28m

1 stop

ONT22:28Ontario

£488

Find similar

British Airways

4 Dec

ONT10:47Ontario

15h 13m

1 stop

LHR10:00London Heathrow

10 Dec

LHR10:15London Heathrow

16h 02m

1 stop

ONT18:17Ontario

£491

Find similar

KLM flights from Ontario to London

Our best KLM deals on Ontario to London flight tickets

KLM

8 Dec

ONT06:40Ontario

19h 50m

1 stop

LHR10:30London Heathrow

23 Dec

LHR14:45London Heathrow

16h 04m

1 stop

ONT22:49Ontario

£451

Find similar

KLM

21 Apr

ONT13:00Ontario

12h 50m

1 stop

LHR09:50London Heathrow

12 May

LHR11:20London Heathrow

13h 56m

1 stop

ONT17:16Ontario

£469

Find similar

KLM

8 Dec

ONT06:00Ontario

20h 00m

1 stop

LHR10:00London Heathrow

22 Dec

LHR14:45London Heathrow

16h 04m

1 stop

ONT22:49Ontario

£489

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 20/1

16:45-13:15

1 stop12h 30m

London Heathrow

Tue 3/2

15:00-22:48

1 stop15h 48m

£446

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 8/12

06:40-10:30

1 stop19h 50m

London Heathrow

Tue 23/12

14:45-22:49

1 stop16h 04m

£451

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 24/2

13:15-11:40

1 stop14h 25m

London Heathrow

Tue 17/3

14:30-22:34

1 stop15h 04m

£454

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 12/1

07:30-11:55

1 stop20h 25m

London Heathrow

Sat 31/1

06:30-22:51

2 stops24h 21m

£455

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 11/1

10:58-08:35

1 stop13h 37m

London Heathrow

Tue 27/1

15:00-22:48

1 stop15h 48m

£458

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 6/1

12:41-20:10

2 stops23h 29m

London Heathrow

Tue 13/1

20:00-11:31

2 stops23h 31m

£460

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 15/4

11:55-09:00

1 stop13h 05m

London Heathrow

Tue 5/5

09:55-22:40

2 stops20h 45m

£464

OntarioLondon

ONT - LCY

ONTLCY

Ontario

Thu 5/3

07:10-08:50

2 stops17h 40m

London City

Thu 12/3

07:50-23:59

2 stops23h 09m

£503

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 28/1

07:16-09:00

2 stops17h 44m

London Gatwick

Sun 1/2

12:30-10:08

2 stops53h 38m

£610

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 28/1

06:00-09:00

2 stops19h 00m

London Gatwick

Sun 1/2

11:20-18:45

2 stops39h 25m

£629

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the typical price of a round-trip flight between Ontario and London?

What is the cheapest month to fly to London?

The cheapest month to fly to London from Ontario is in October. Flight prices, which tend to average around £514, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from Ontario averaging around £518.

What is the cheapest day to depart on your flight to London?

Our data shows that Monday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £499. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to London for around £595.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £525. Flights at midday are often more expensive, with an average ticket price of £665.

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

You are more likely to see cheaper flights to London from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £632 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Ontario for as low as £459 on momondo.

When to book flights from Ontario to London

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to London according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Ontario to London (ONT to LON) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to London

Fastest flight time	12h 06m
Direct flights	None

The fastest flight from Ontario to London takes 12h 06m

There are no direct flights from Ontario to London. There are no popular flight routes from Ontario to London.

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How far is Ontario to London by plane?
Ontario and London are 5417.5 mi apart from one another. Typically, this will take 12h 06m by plane in normal conditions.
When did momondo last update prices for flights from Ontario Airport to London?
Prices for flights from Ontario Airport to London refresh daily.
How old do you have to be to fly from Ontario Airport to London?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to London.
What documentation or ID do you need to fly to London?
The travel and health documents you'll need for your trip to London may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Eastbourne

Milton Keynes

Luton

Gatwick

Maidstone

Slough

Canterbury

Southend-on-Sea

Ipswich

Ilford

Guildford

Dover

Colchester

Chelmsford

Hayes

Worthing

Ramsgate

Dartford

Bedford

Winchester

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to London?

Finding the right flight to London from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

Can I find flights from Ontario to London with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ontario to London flights to just show those with flexible booking policies.

How can momondo help me find flights from Ontario to London?

Once you have performed a search for Ontario to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Ontario to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ontario to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.