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

United Airlines, Air Canada, and Delta 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.

£194 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.

07:30 - 10:30

ONT

LHR

19h 00m1 stop

06:30 - 22:51

LHR

ONT

24h 21m2 stops

£454Virgin Atlantic

Thu, 8 Jan - Wed, 21 Jan

07:30 - 10:30

ONT

LHR

19h 00m1 stop

06:30 - 22:51

LHR

ONT

24h 21m2 stops

£458Virgin Atlantic

Thu, 22 Jan - Thu, 29 Jan

07:30 - 16:05

ONT

LHR

24h 35m2 stops

06:30 - 22:51

LHR

ONT

24h 21m2 stops

£462Virgin Atlantic

Thu, 22 Jan - Thu, 29 Jan

17:07 - 20:10

ONT

LHR

19h 03m2 stops

06:30 - 22:51

LHR

ONT

24h 21m2 stops

£464Delta

Thu, 8 Jan - Wed, 21 Jan

13:24 - 09:40

ONT

LHR

12h 16m1 stop

06:35 - 17:43

LHR

ONT

19h 08m2 stops

£471United Airlines

Thu, 22 Jan - Thu, 29 Jan

22:30 - 06:25

ONT

LHR

23h 55m1 stop

06:30 - 22:51

LHR

ONT

24h 21m2 stops

£472Delta

Wed, 7 Jan - Wed, 14 Jan

18:39 - 09:40

ONT

LHR

55h 01m2 stops

08:30 - 21:59

LHR

ONT

21h 29m2 stops

£473United Airlines

Mon, 5 Jan - Tue, 20 Jan

06:27 - 07:30

ONT

LGW

17h 03m2 stops

11:20 - 12:03

LGW

ONT

32h 43m2 stops

£548American Airlines

Fri, 23 Jan - Fri, 30 Jan

06:10 - 08:50

ONT

LCY

18h 40m2 stops

07:50 - 23:59

LCY

ONT

23h 09m2 stops

£587Iberia

Thu, 5 Mar - Wed, 18 Mar

07:16 - 10:50

ONT

LGW

19h 34m2 stops

11:45 - 10:08

LGW

ONT

30h 23m2 stops

£590Iberia

Sat, 17 Jan - Mon, 2 Feb

United Airlines flights from Ontario to London

Our best United Airlines deals on Ontario to London flight tickets

United Airlines

5 Jan

ONT18:39Ontario

28h 46m

1 stop

LHR07:25London Heathrow

20 Jan

LHR07:30London Heathrow

22h 29m

2 stops

ONT21:59Ontario

£473

Find similar

United Airlines

30 Jan

ONT13:24Ontario

12h 16m

1 stop

LHR09:40London Heathrow

3 Feb

LHR09:30London Heathrow

20h 29m

2 stops

ONT21:59Ontario

£479

Find similar

United Airlines

30 Jan

ONT05:05Ontario

17h 35m

2 stops

LHR06:40London Heathrow

3 Feb

LHR08:30London Heathrow

21h 29m

2 stops

ONT21:59Ontario

£482

Find similar

Air Canada flights from Ontario to London

Our best Air Canada deals on Ontario to London flight tickets

Air Canada

6 Jan

ONT13:24Ontario

33h 46m

2 stops

LHR07:10London Heathrow

11 Jan

LHR13:25London Heathrow

39h 33m

2 stops

ONT20:58Ontario

£491

Find similar

Air Canada

8 Jan

ONT05:05Ontario

17h 25m

2 stops

LHR06:30London Heathrow

12 Jan

LHR11:10London Heathrow

17h 48m

2 stops

ONT20:58Ontario

£577

Find similar

Air Canada

5 Jan

ONT13:40Ontario

56h 50m

2 stops

LHR06:30London Heathrow

20 Jan

LHR13:25London Heathrow

39h 33m

2 stops

ONT20:58Ontario

£579

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 8/1

07:30-10:30

1 stop19h 00m

London Heathrow

Wed 21/1

06:30-22:51

2 stops24h 21m

£454

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 22/1

07:30-10:30

1 stop19h 00m

London Heathrow

Thu 29/1

06:30-22:51

2 stops24h 21m

£458

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 22/1

07:30-16:05

2 stops24h 35m

London Heathrow

Thu 29/1

06:30-22:51

2 stops24h 21m

£462

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 8/1

17:07-20:10

2 stops19h 03m

London Heathrow

Wed 21/1

06:30-22:51

2 stops24h 21m

£464

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 22/1

13:24-09:40

1 stop12h 16m

London Heathrow

Thu 29/1

06:35-17:43

2 stops19h 08m

£471

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 7/1

22:30-06:25

1 stop23h 55m

London Heathrow

Wed 14/1

06:30-22:51

2 stops24h 21m

£472

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 5/1

18:39-09:40

2 stops55h 01m

London Heathrow

Tue 20/1

08:30-21:59

2 stops21h 29m

£473

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Fri 23/1

06:27-07:30

2 stops17h 03m

London Gatwick

Fri 30/1

11:20-12:03

2 stops32h 43m

£548

OntarioLondon

ONT - LCY

ONTLCY

Ontario

Thu 5/3

06:10-08:50

2 stops18h 40m

London City

Wed 18/3

07:50-23:59

2 stops23h 09m

£587

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Sat 17/1

07:16-10:50

2 stops19h 34m

London Gatwick

Mon 2/2

11:45-10:08

2 stops30h 23m

£590

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 £493, 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 £509.

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 £490. 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 £591.

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 £517. Flights at midday are often more expensive, with an average ticket price of £647.

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 £621 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 £455 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

Hayes

Chelmsford

Dover

Worthing

Colchester

Bedford

Ramsgate

Hounslow

Stansted

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.