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

Virgin Atlantic, British Airways, and JetBlue 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 48% of people opting to fly with this airline when travelling to London. Keep in mind that there are 12 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.

£197 Cheap Flights from Ontario to London (ONT-LON) in 2025

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 £443 to £557. The lowest price recently found on this route was £325.

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Find the cheapest flights from Ontario to London (ONT-LON)

Round-trip

One-way

Last minute

Cheap return flights

06:00 - 11:20ONT-LHR

21h 20m1 stop

13:25 - 22:41LHR-ONT

17h 16m1 stop

£325Virgin Atlantic

Find Deal

Sun, 5 Oct - Tue, 21 Oct

06:00 - 14:15ONT-LHR

24h 15m1 stop

06:30 - 22:41LHR-ONT

24h 11m2 stops

£326Virgin Atlantic

Find Deal

Sun, 5 Oct - Tue, 21 Oct

11:55 - 13:30ONT-LHR

17h 35m1 stop

13:05 - 22:22LHR-ONT

17h 17m1 stop

£386KLM

Find Deal

Sun, 5 Oct - Tue, 21 Oct

11:50 - 14:15ONT-LHR

18h 25m1 stop

11:30 - 22:41LHR-ONT

19h 11m2 stops

£387Delta

Find Deal

Sun, 5 Oct - Tue, 21 Oct

11:50 - 14:15ONT-LHR

18h 25m1 stop

06:15 - 17:10LHR-ONT

18h 55m2 stops

£388Delta

Find Deal

Wed, 1 Oct - Fri, 10 Oct

09:50 - 21:25ONT-LHR

27h 35m2 stops

06:30 - 19:19LHR-ONT

20h 49m2 stops

£389

Find Deal

Sun, 5 Oct - Tue, 21 Oct

11:45 - 09:00ONT-LHR

13h 15m1 stop

10:45 - 16:19LHR-ONT

13h 34m1 stop

£393KLM

Find Deal

Tue, 25 Nov - Tue, 24 Feb

05:05 - 06:30ONT-LHR

17h 25m2 stops

14:10 - 12:13LHR-ONT

30h 03m2 stops

£443Air Canada

Find Deal

Sun, 5 Oct - Tue, 21 Oct

11:56 - 09:00ONT-LHR

13h 04m1 stop

10:45 - 16:19LHR-ONT

13h 34m1 stop

£486

Find Deal

Mon, 29 Dec - Tue, 13 Jan

05:05 - 11:50ONT-LHR

22h 45m2 stops

13:00 - 20:44LHR-ONT

38h 44m2 stops

£496Air Canada

Find Deal

Mon, 20 Oct - Fri, 31 Oct

KLM flights from Ontario to London

Our best KLM deals on Ontario to London flight tickets

KLM

5 Oct

ONT11:55Ontario

17h 35m

1 stop

LHR13:30London Heathrow

21 Oct

LHR13:05London Heathrow

17h 17m

1 stop

ONT22:22Ontario

£386

Find similar

KLM

25 Nov

ONT11:45Ontario

13h 15m

1 stop

LHR09:00London Heathrow

24 Feb

LHR10:45London Heathrow

13h 34m

1 stop

ONT16:19Ontario

£393

Find similar

KLM

15 Sept

ONT13:15Ontario

12h 35m

1 stop

LHR09:50London Heathrow

26 Sept

LHR09:20London Heathrow

17h 55m

1 stop

ONT19:15Ontario

£422

Find similar

Delta flights from Ontario to London

Our best Delta deals on Ontario to London flight tickets

Delta

5 Oct

ONT11:50Ontario

18h 25m

1 stop

LHR14:15London Heathrow

21 Oct

LHR11:30London Heathrow

19h 11m

2 stops

ONT22:41Ontario

£387

Find similar

Delta

1 Oct

ONT11:50Ontario

18h 25m

1 stop

LHR14:15London Heathrow

10 Oct

LHR06:15London Heathrow

18h 55m

2 stops

ONT17:10Ontario

£388

Find similar

Delta

1 Oct

ONT11:55Ontario

16h 10m

2 stops

LHR12:05London Heathrow

10 Oct

LHR06:15London Heathrow

18h 55m

2 stops

ONT17:10Ontario

£391

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 5/10

06:00-11:20

1 stop21h 20m

London Heathrow

Tue 21/10

13:25-22:41

1 stop17h 16m

£325

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 5/10

06:00-14:15

1 stop24h 15m

London Heathrow

Tue 21/10

06:30-22:41

2 stops24h 11m

£326

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 5/10

11:55-13:30

1 stop17h 35m

London Heathrow

Tue 21/10

13:05-22:22

1 stop17h 17m

£386

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 5/10

11:50-14:15

1 stop18h 25m

London Heathrow

Tue 21/10

11:30-22:41

2 stops19h 11m

£387

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 1/10

11:50-14:15

1 stop18h 25m

London Heathrow

Fri 10/10

06:15-17:10

2 stops18h 55m

£388

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 5/10

09:50-21:25

2 stops27h 35m

London Heathrow

Tue 21/10

06:30-19:19

2 stops20h 49m

£389

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 25/11

11:45-09:00

1 stop13h 15m

London Heathrow

Tue 24/2

10:45-16:19

1 stop13h 34m

£393

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 5/10

05:05-06:30

2 stops17h 25m

London Heathrow

Tue 21/10

14:10-12:13

2 stops30h 03m

£443

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 29/12

11:56-09:00

1 stop13h 04m

London Heathrow

Tue 13/1

10:45-16:19

1 stop13h 34m

£486

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 20/10

05:05-11:50

2 stops22h 45m

London Heathrow

Fri 31/10

13:00-20:44

2 stops38h 44m

£496

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 September. 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 £502.

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 £514. 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 £583.

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 £523. Flights at midday are often more expensive, with an average ticket price of £687.

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 £629 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 £499 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

Direct flights	None

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 05m 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

Maidstone

Slough

Gatwick

Canterbury

Southend-on-Sea

Ipswich

Ilford

Guildford

Colchester

Worthing

Dartford

Chelmsford

Dover

Hounslow

Hayes

Folkestone

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.