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

JetBlue, British Airways, and Iberia are the most popular carriers operating from Ontario to London

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 50% 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.

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.

£183 Cheap Flights from Ontario to London in 2025/26

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Find the cheapest flights from Ontario to London

Round-trip

One-way

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Enter your travel dates to find the best prices.

06:00 - 07:10

ONT

LHR

17h 10m2 stops

07:40 - 22:36

LHR

ONT

21h 56m2 stops

£462Multiple Airlines

Thu, 5 Mar - Thu, 12 Mar

06:10 - 06:50

ONT

LHR

16h 40m1 stop

06:00 - 22:48

LHR

ONT

23h 48m2 stops

£465Iberia

Tue, 3 Mar - Tue, 10 Mar

07:30 - 10:30

ONT

LHR

19h 00m1 stop

06:30 - 21:04

LHR

ONT

21h 34m2 stops

£467Delta

Thu, 5 Mar - Thu, 12 Mar

13:15 - 11:40

ONT

LHR

14h 25m1 stop

06:30 - 17:12

LHR

ONT

17h 42m2 stops

£467KLM

Thu, 5 Mar - Thu, 12 Mar

06:00 - 08:45

ONT

LHR

18h 45m2 stops

06:30 - 21:04

LHR

ONT

21h 34m2 stops

£470Delta

Thu, 5 Mar - Thu, 12 Mar

06:00 - 10:30

ONT

LHR

20h 30m2 stops

06:30 - 22:51

LHR

ONT

24h 21m2 stops

£471Virgin Atlantic

Fri, 23 Jan - Sat, 31 Jan

06:00 - 10:00

ONT

LHR

21h 00m1 stop

06:20 - 23:50

LHR

ONT

24h 30m2 stops

£472Delta

Wed, 11 Mar - Wed, 18 Mar

05:15 - 07:10

ONT

LHR

18h 55m2 stops

15:00 - 12:49

LHR

ONT

28h 49m2 stops

£473Air Canada

Sun, 15 Mar - Mon, 23 Mar

13:50 - 09:40

ONT

LHR

12h 50m1 stop

06:30 - 22:57

LHR

ONT

23h 27m2 stops

£475United Airlines

Sun, 15 Mar - Tue, 24 Mar

13:24 - 09:40

ONT

LHR

12h 16m1 stop

11:10 - 22:53

LHR

ONT

19h 43m2 stops

£476Lufthansa

Thu, 22 Jan - Wed, 4 Feb

Iberia flights from Ontario to London

Our best Iberia deals on Ontario to London flight tickets

Iberia

3 Mar

ONT06:10Ontario

16h 40m

1 stop

LHR06:50London Heathrow

10 Mar

LHR06:00London Heathrow

23h 48m

2 stops

ONT22:48Ontario

£465

Find similar

Iberia

13 Feb

ONT10:59Ontario

13h 16m

1 stop

LHR08:15London Heathrow

26 Feb

LHR16:30London Heathrow

15h 28m

1 stop

ONT23:58Ontario

£488

Find similar

Iberia

22 Jan

ONT10:58Ontario

15h 02m

1 stop

LHR10:00London Heathrow

4 Feb

LHR16:30London Heathrow

29h 48m

1 stop

ONT14:18Ontario

£498

Find similar

Air Canada flights from Ontario to London

Our best Air Canada deals on Ontario to London flight tickets

Air Canada

15 Mar

ONT05:15Ontario

18h 55m

2 stops

LHR07:10London Heathrow

23 Mar

LHR15:00London Heathrow

28h 49m

2 stops

ONT12:49Ontario

£473

Find similar

Air Canada

15 Mar

ONT05:15Ontario

18h 55m

2 stops

LHR07:10London Heathrow

24 Mar

LHR11:10London Heathrow

40h 40m

2 stops

ONT20:50Ontario

£478

Find similar

Air Canada

16 Mar

ONT05:15Ontario

20h 15m

2 stops

LHR08:30London Heathrow

26 Mar

LHR11:10London Heathrow

56h 38m

2 stops

ONT12:48Ontario

£513

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 5/3

06:00-07:10

2 stops17h 10m

London Heathrow

Thu 12/3

07:40-22:36

2 stops21h 56m

£462

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 3/3

06:10-06:50

1 stop16h 40m

London Heathrow

Tue 10/3

06:00-22:48

2 stops23h 48m

£465

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 5/3

07:30-10:30

1 stop19h 00m

London Heathrow

Thu 12/3

06:30-21:04

2 stops21h 34m

£467

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 5/3

13:15-11:40

1 stop14h 25m

London Heathrow

Thu 12/3

06:30-17:12

2 stops17h 42m

£467

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 5/3

06:00-08:45

2 stops18h 45m

London Heathrow

Thu 12/3

06:30-21:04

2 stops21h 34m

£470

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Fri 23/1

06:00-10:30

2 stops20h 30m

London Heathrow

Sat 31/1

06:30-22:51

2 stops24h 21m

£471

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 11/3

06:00-10:00

1 stop21h 00m

London Heathrow

Wed 18/3

06:20-23:50

2 stops24h 30m

£472

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 15/3

05:15-07:10

2 stops18h 55m

London Heathrow

Mon 23/3

15:00-12:49

2 stops28h 49m

£473

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 15/3

13:50-09:40

1 stop12h 50m

London Heathrow

Tue 24/3

06:30-22:57

2 stops23h 27m

£475

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 22/1

13:24-09:40

1 stop12h 16m

London Heathrow

Wed 4/2

11:10-22:53

2 stops19h 43m

£476

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 cheapest month to fly to London?

The cheapest month to fly to London from Ontario is in February. Flight prices, which tend to average around £487, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from Ontario averaging around £503.

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 £487. 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 £572.

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 £511. Flights at midday are often more expensive, with an average ticket price of £639.

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 £613 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 £449 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 16m
Direct flights	None

The fastest flight from Ontario to London takes 12h 16m

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 16m 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

Southend-on-Sea

Canterbury

Ipswich

Ilford

Guildford

Hayes

Chelmsford

Dover

Worthing

Bedford

Colchester

Hounslow

Ramsgate

Romford

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.