Which airlines fly to London?

Virgin Atlantic, British Airways and American Airlines 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 43% of people opting to fly with this airline when travelling to London. Keep in mind that there are 11 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?

British Airways, JetBlue, and Virgin Atlantic 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.

£235 Cheap Flights from Ontario to London in 2026/27

Find the cheapest flights from Ontario to London

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One-way

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Cheap return flights

Enter your travel dates to find the best prices.

18:35 - 07:25ONT Ontario-LHR London Heathrow

28h 50m1 stop San Francisco

06:50 - 18:44LHR London Heathrow-ONT Ontario

19h 54m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

£568United Airlines

Tue, 2 Mar - Fri, 5 Mar

13:00 - 10:15ONT Ontario-LHR London Heathrow

37h 15m2 stops Denver Intl Houston George Bush Intcntl

06:50 - 18:44LHR London Heathrow-ONT Ontario

19h 54m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

£579United Airlines

Tue, 2 Mar - Fri, 5 Mar

06:30 - 19:30ONT Ontario-LHR London Heathrow

29h 00m2 stops Denver Intl Reykjavik Keflavik Intl

12:15 - 23:51LHR London Heathrow-ONT Ontario

19h 36m2 stops Reykjavik Keflavik Intl Denver Intl

£603Multiple Airlines

Wed, 4 Nov - Mon, 9 Nov

14:21 - 12:15ONT Ontario-LHR London Heathrow

13h 54m1 stop Dallas/Fort Worth

14:45 - 22:41LHR London Heathrow-ONT Ontario

15h 56m1 stop Seattle/Tacoma Intl

£606Multiple Airlines

Sun, 10 Jan - Tue, 26 Jan

14:21 - 12:00ONT Ontario-LHR London Heathrow

13h 39m1 stop Dallas/Fort Worth

14:45 - 22:41LHR London Heathrow-ONT Ontario

15h 56m1 stop Seattle/Tacoma Intl

£606Multiple Airlines

Tue, 12 Jan - Sat, 16 Jan

14:21 - 12:00ONT Ontario-LHR London Heathrow

13h 39m1 stop Dallas/Fort Worth

14:45 - 22:41LHR London Heathrow-ONT Ontario

15h 56m1 stop Seattle/Tacoma Intl

£607Multiple Airlines

Wed, 6 Jan - Tue, 12 Jan

16:19 - 13:35ONT Ontario-LHR London Heathrow

13h 16m1 stop Phoenix Sky Harbor Intl

14:45 - 10:38LHR London Heathrow-ONT Ontario

27h 53m1 stop Seattle/Tacoma Intl

£610Multiple Airlines

Mon, 11 Jan - Mon, 18 Jan

06:25 - 19:30ONT Ontario-LHR London Heathrow

29h 05m2 stops Denver Intl Reykjavik Keflavik Intl

12:15 - 00:14LHR London Heathrow-ONT Ontario

19h 59m2 stops Reykjavik Keflavik Intl Denver Intl

£612Multiple Airlines

Sat, 14 Nov - Sat, 21 Nov

06:25 - 10:50ONT Ontario-LHR London Heathrow

20h 25m2 stops Denver Intl Reykjavik Keflavik Intl

12:15 - 23:51LHR London Heathrow-ONT Ontario

19h 36m2 stops Reykjavik Keflavik Intl Denver Intl

£612Multiple Airlines

Wed, 11 Nov - Tue, 17 Nov

16:16 - 12:20ONT Ontario-LHR London Heathrow

36h 04m1 stop Seattle/Tacoma Intl

14:45 - 10:38LHR London Heathrow-ONT Ontario

27h 53m1 stop Seattle/Tacoma Intl

£618Alaska Airlines

Sat, 23 Jan - Sun, 31 Jan

Cheap last-minute flights

Enter your travel dates to find the best prices.

22:42 - 09:30ONT Ontario-LHR London Heathrow

26h 48m1 stop New York John F Kennedy Intl

11:55 - 22:14LHR London Heathrow-ONT Ontario

18h 19m1 stop New York John F Kennedy Intl

£715JetBlue

Mon, 5 Oct - Fri, 16 Oct

23:05 - 09:30ONT Ontario-LHR London Heathrow

26h 25m1 stop New York John F Kennedy Intl

11:55 - 22:12LHR London Heathrow-ONT Ontario

18h 17m1 stop New York John F Kennedy Intl

£735JetBlue

Fri, 9 Oct - Wed, 14 Oct

22:42 - 09:30ONT Ontario-LHR London Heathrow

26h 48m1 stop New York John F Kennedy Intl

11:55 - 22:12LHR London Heathrow-ONT Ontario

18h 17m1 stop New York John F Kennedy Intl

£747JetBlue

Mon, 5 Oct - Wed, 14 Oct

13:05 - 10:30ONT Ontario-LHR London Heathrow

13h 25m1 stop Phoenix Sky Harbor Intl

10:05 - 15:16LHR London Heathrow-ONT Ontario

13h 11m1 stop Phoenix Sky Harbor Intl

£774British Airways

Tue, 6 Oct - Wed, 14 Oct

23:05 - 20:45ONT Ontario-LHR London Heathrow

13h 40m1 stop New York John F Kennedy Intl

08:15 - 22:12LHR London Heathrow-ONT Ontario

21h 57m1 stop New York John F Kennedy Intl

£781JetBlue

Fri, 9 Oct - Tue, 13 Oct

07:07 - 11:20ONT Ontario-LHR London Heathrow

20h 13m1 stop Atlanta Hartsfield-Jackson

06:30 - 17:12LHR London Heathrow-ONT Ontario

18h 42m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

£798Multiple Airlines

Tue, 6 Oct - Thu, 15 Oct

22:42 - 09:30ONT Ontario-LHR London Heathrow

26h 48m1 stop New York John F Kennedy Intl

08:15 - 22:12LHR London Heathrow-ONT Ontario

21h 57m1 stop New York John F Kennedy Intl

£799JetBlue

Tue, 6 Oct - Thu, 15 Oct

22:42 - 09:30ONT Ontario-LHR London Heathrow

26h 48m1 stop New York John F Kennedy Intl

08:15 - 22:12LHR London Heathrow-ONT Ontario

21h 57m1 stop New York John F Kennedy Intl

£800JetBlue

Tue, 6 Oct - Wed, 14 Oct

09:45 - 10:20ONT Ontario-LHR London Heathrow

16h 35m2 stops Salt Lake City Minneapolis St Paul

11:45 - 22:43LHR London Heathrow-ONT Ontario

18h 58m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

£802Delta

Tue, 6 Oct - Thu, 15 Oct

13:24 - 09:40ONT Ontario-LHR London Heathrow

12h 16m1 stop Denver Intl

11:05 - 18:47LHR London Heathrow-ONT Ontario

39h 42m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

£808United Airlines

Sun, 4 Oct - Mon, 2 Nov

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Alaska Airlines flights from Ontario to London

Our best Alaska Airlines deals on Ontario to London flight tickets

Alaska Airlines

23 Jan

ONT16:16Ontario

36h 04m

1 stop

LHR12:20London Heathrow

31 Jan

LHR14:45London Heathrow

27h 53m

1 stop

ONT10:38Ontario

£618

Alaska Airlines

6 Jan

ONT07:00Ontario

21h 20m

1 stop

LHR12:20London Heathrow

15 Jan

LHR14:45London Heathrow

27h 53m

1 stop

ONT10:38Ontario

£625

Alaska Airlines

9 Jan

ONT16:16Ontario

36h 04m

1 stop

LHR12:20London Heathrow

22 Jan

LHR14:45London Heathrow

15h 56m

1 stop

ONT22:41Ontario

£630

British Airways flights from Ontario to London

Our best British Airways deals on Ontario to London flight tickets

British Airways

13 Jan

ONT16:19Ontario

13h 16m

1 stop

LHR13:35London Heathrow

23 Jan

LHR11:15London Heathrow

15h 36m

1 stop

ONT18:51Ontario

£636

British Airways

24 Mar

ONT17:02Ontario

13h 33m

1 stop

LHR13:35London Heathrow

3 Apr

LHR16:10London Heathrow

13h 57m

1 stop

ONT22:07Ontario

£639

British Airways

18 Feb

ONT16:59Ontario

12h 36m

1 stop

LHR13:35London Heathrow

25 Feb

LHR14:35London Heathrow

15h 33m

1 stop

ONT22:08Ontario

£673

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 2/3

18:35-07:25

1 stop28h 50m

London Heathrow

Fri 5/3

06:50-18:44

2 stops19h 54m

£568

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 2/3

13:00-10:15

2 stops37h 15m

London Heathrow

Fri 5/3

06:50-18:44

2 stops19h 54m

£579

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 4/11

06:30-19:30

2 stops29h 00m

London Heathrow

Mon 9/11

12:15-23:51

2 stops19h 36m

£603

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 10/1

14:21-12:15

1 stop13h 54m

London Heathrow

Tue 26/1

14:45-22:41

1 stop15h 56m

£606

Fastest return journey

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 12/1

14:21-12:00

1 stop13h 39m

London Heathrow

Sat 16/1

14:45-22:41

1 stop15h 56m

£606

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 6/1

14:21-12:00

1 stop13h 39m

London Heathrow

Tue 12/1

14:45-22:41

1 stop15h 56m

£607

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 11/1

16:19-13:35

1 stop13h 16m

London Heathrow

Mon 18/1

14:45-10:38

1 stop27h 53m

£610

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sat 14/11

06:25-19:30

2 stops29h 05m

London Heathrow

Sat 21/11

12:15-00:14

2 stops19h 59m

£612

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 11/11

06:25-10:50

2 stops20h 25m

London Heathrow

Tue 17/11

12:15-23:51

2 stops19h 36m

£612

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sat 23/1

16:16-12:20

1 stop36h 04m

London Heathrow

Sun 31/1

14:45-10:38

1 stop27h 53m

£618

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 January. Flight prices, which tend to average around £519, are often lower during this time because this is during the off-season. The month of December is another great option to travel to London, with average flight prices from Ontario averaging around £558.

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

Our data shows that Tuesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £724. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to London for around £930.

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

The cheapest time of day to fly to London is at midday when flights can be purchased for as low as £651. Flights in the afternoon are often more expensive, with an average ticket price of £828.

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

Best price found	£235
Fastest flight time	12h 00m
Direct flights	None

The best one-way flight to London from Ontario in the past 72 hours is £235. The best return flight deal from Ontario to London found on momondo in the last 72 hours is £568.

The fastest flight from Ontario to London takes 12h 00m

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

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Frequently asked questions about flying from Ontario to London

How far is Ontario to London by plane?
Ontario and London are 5417.5 mi apart from one another. Typically, this will take 12h 00m 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

Wembley

Gatwick

Milton Keynes

Southend-on-Sea

Luton

Slough

Ipswich

Maidstone

Folkestone

Hastings

Ilford

Canterbury

Chichester

Hayes

Bedford

Colchester

Guildford

Harlow

Chelmsford

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.

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Cheap flights from Ontario to London from £235

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to London departing on 7/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Alaska Airlines flights from Ontario to London

Our best Alaska Airlines deals on Ontario to London flight tickets

British Airways flights from Ontario to London

Our best British Airways deals on Ontario to London flight tickets

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How to get the cheapest flight ticket from Ontario to London

What is the cheapest month to fly to London?

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

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

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

Which airlines fly to London?

When to book flights from Ontario to London

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

Best price found

Fastest flight time

Direct flights

Frequently asked questions about flying from Ontario to London

Travelling to a place near London?

Why use momondo?

An easier way to manage your London trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London

Fly your favourite airline to London

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to London

List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

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Popular flights according to clicks in the last 7 days on momondo

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