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

JetBlue, KLM, and United Airlines 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 53% of people opting to fly with this airline when travelling to London. Keep in mind that there are 14 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.

£164 Cheap Flights from Ontario to London in 2026

1 adult

0 bags

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Ontario to London

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

07:30 - 10:30

ONT

LHR

19h 00m

1 stop

06:30 - 17:12

LHR

ONT

17h 42m

2 stops

£464KLM

Thu, 5 Mar - Thu, 12 Mar

06:00 - 07:05

ONT

LHR

17h 05m

2 stops

06:30 - 22:33

LHR

ONT

23h 03m

2 stops

£467Delta

Thu, 5 Mar - Thu, 12 Mar

13:40 - 12:00

ONT

LHR

15h 20m

1 stop

09:30 - 22:36

LHR

ONT

20h 06m

2 stops

£472United Airlines

Wed, 18 Mar - Wed, 25 Mar

06:00 - 10:00

ONT

LHR

21h 00m

1 stop

11:45 - 17:13

LHR

ONT

37h 28m

2 stops

£475Delta

Tue, 17 Mar - Tue, 31 Mar

14:39 - 11:40

ONT

LHR

13h 01m

1 stop

14:25 - 22:07

LHR

ONT

14h 42m

1 stop

£478British Airways

Mon, 2 Mar - Mon, 9 Mar

14:39 - 11:40

ONT

LHR

13h 01m

1 stop

14:20 - 22:07

LHR

ONT

14h 47m

1 stop

£478British Airways

Tue, 3 Mar - Tue, 10 Mar

05:10 - 10:00

ONT

LHR

20h 50m

2 stops

15:05 - 17:47

LHR

ONT

34h 42m

2 stops

£482Air Canada

Mon, 6 Apr - Tue, 21 Apr

13:27 - 14:10

ONT

LHR

16h 43m

1 stop

07:30 - 21:50

LHR

ONT

22h 20m

2 stops

£484United Airlines

Tue, 31 Mar - Fri, 10 Apr

06:00 - 10:50

ONT

LGW

20h 50m

2 stops

19:40 - 13:49

LGW

ONT

26h 09m

2 stops

£603Iberia

Thu, 26 Feb - Wed, 4 Mar

07:00 - 10:50

ONT

LGW

19h 50m

2 stops

19:40 - 22:49

LGW

ONT

34h 09m

2 stops

£668Iberia

Tue, 24 Feb - Mon, 9 Mar

KLM flights from Ontario to London

Our best KLM deals on Ontario to London flight tickets

KLM

5 Mar

ONT07:30Ontario

19h 00m

1 stop

LHR10:30London Heathrow

12 Mar

LHR06:30London Heathrow

21h 30m

2 stops

ONT21:00Ontario

£464

KLM

5 Mar

ONT07:30Ontario

19h 00m

1 stop

LHR10:30London Heathrow

12 Mar

LHR14:30London Heathrow

15h 03m

1 stop

ONT22:33Ontario

£485

KLM

30 Mar

ONT12:57Ontario

14h 23m

1 stop

LHR11:20London Heathrow

7 Apr

LHR10:55London Heathrow

13h 33m

1 stop

ONT16:28Ontario

£497

United Airlines flights from Ontario to London

Our best United Airlines deals on Ontario to London flight tickets

United Airlines

18 Mar

ONT13:40Ontario

15h 20m

1 stop

LHR12:00London Heathrow

25 Mar

LHR09:30London Heathrow

20h 06m

2 stops

ONT22:36Ontario

£472

United Airlines

31 Mar

ONT13:27Ontario

16h 43m

1 stop

LHR14:10London Heathrow

10 Apr

LHR07:30London Heathrow

22h 20m

2 stops

ONT21:50Ontario

£484

United Airlines

8 Apr

ONT05:10Ontario

20h 30m

1 stop

LHR09:40London Heathrow

21 Apr

LHR17:40London Heathrow

36h 46m

2 stops

ONT22:26Ontario

£486

Fly from

Fly to

Route

Depart

Return

Price

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 5/3

07:30-10:30

1 stop19h 00m

London Heathrow

Thu 12/3

06:30-17:12

2 stops17h 42m

£464

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 5/3

06:00-07:05

2 stops17h 05m

London Heathrow

Thu 12/3

06:30-22:33

2 stops23h 03m

£467

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 18/3

13:40-12:00

1 stop15h 20m

London Heathrow

Wed 25/3

09:30-22:36

2 stops20h 06m

£472

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 17/3

06:00-10:00

1 stop21h 00m

London Heathrow

Tue 31/3

11:45-17:13

2 stops37h 28m

£475

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 2/3

14:39-11:40

1 stop13h 01m

London Heathrow

Mon 9/3

14:25-22:07

1 stop14h 42m

£478

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 3/3

14:39-11:40

1 stop13h 01m

London Heathrow

Tue 10/3

14:20-22:07

1 stop14h 47m

£478

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 6/4

05:10-10:00

2 stops20h 50m

London Heathrow

Tue 21/4

15:05-17:47

2 stops34h 42m

£482

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 31/3

13:27-14:10

1 stop16h 43m

London Heathrow

Fri 10/4

07:30-21:50

2 stops22h 20m

£484

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Thu 26/2

06:00-10:50

2 stops20h 50m

London Gatwick

Wed 4/3

19:40-13:49

2 stops26h 09m

£603

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Tue 24/2

07:00-10:50

2 stops19h 50m

London Gatwick

Mon 9/3

19:40-22:49

2 stops34h 09m

£668

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 £478, 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 £496.

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

Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £492. 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 £579.

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 £500. Flights at midday are often more expensive, with an average ticket price of £630.

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 £618 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 £443 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 13m
Direct flights	None

The fastest flight from Ontario to London takes 12h 13m

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

Search flight deals

How far is Ontario to London by plane?
Ontario and London are 5417.5 mi apart from one another. Typically, this will take 12h 13m 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

Chelmsford

Hayes

Dover

Folkestone

Bedford

Colchester

Wembley

Worthing

Ramsgate

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.