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

KLM, Alaska Airlines, and Delta are the most popular carriers operating from Ontario to London

Which airlines fly to London?

Virgin Atlantic, British Airways and KLM 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.

£220 Cheap Flights from Ontario to London in 2026

Q: What is the typical price of a round-trip flight between Ontario and London?

Prices are currently typical for flights on this route. Typical prices usually range from £482 to £795. The lowest price recently found on this route was £496.

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Find the cheapest flights from Ontario to London

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One-way

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Enter your travel dates to find the best prices.

14:08 - 14:25

ONT

LHR

16h 17m

1 stop

11:30 - 23:46

LHR

ONT

20h 16m

2 stops

£496Iberia

Wed, 8 Apr - Wed, 29 Apr

06:00 - 10:30

ONT

LHR

21h 30m

1 stop

06:30 - 23:51

LHR

ONT

25h 21m

2 stops

£500Delta

Mon, 23 Mar - Thu, 2 Apr

06:00 - 12:10

ONT

LHR

22h 10m

1 stop

06:15 - 23:51

LHR

ONT

25h 36m

2 stops

£505Delta

Wed, 1 Apr - Fri, 10 Apr

11:53 - 15:35

ONT

LHR

19h 42m

1 stop

09:55 - 21:00

LHR

ONT

19h 05m

2 stops

£507Delta

Wed, 15 Apr - Tue, 5 May

13:40 - 12:00

ONT

LHR

15h 20m

1 stop

10:05 - 17:41

LHR

ONT

14h 36m

1 stop

£509United Airlines

Wed, 11 Mar - Tue, 24 Mar

13:33 - 07:25

ONT

LHR

33h 52m

1 stop

09:30 - 21:21

LHR

ONT

19h 51m

2 stops

£512United Airlines

Sat, 22 Aug - Tue, 8 Sep

06:00 - 10:30

ONT

LHR

21h 30m

1 stop

11:40 - 23:51

LHR

ONT

19h 11m

2 stops

£512Virgin Atlantic

Wed, 11 Mar - Wed, 25 Mar

10:56 - 07:55

ONT

LHR

12h 59m

1 stop

10:05 - 16:22

LHR

ONT

14h 17m

1 stop

£513British Airways

Wed, 1 Apr - Tue, 14 Apr

07:00 - 16:00

ONT

LGW

25h 00m

2 stops

10:25 - 16:14

LGW

ONT

37h 49m

2 stops

£628Air France

Wed, 12 Aug - Sun, 23 Aug

10:56 - 15:15

ONT

LCY

20h 19m

2 stops

09:50 - 23:46

LCY

ONT

21h 56m

2 stops

£884British Airways

Tue, 31 Mar - Wed, 29 Apr

Delta flights from Ontario to London

Our best Delta deals on Ontario to London flight tickets

Delta

15 Apr

ONT14:20Ontario

13h 50m

1 stop

LHR12:10London Heathrow

5 May

LHR09:55London Heathrow

19h 05m

2 stops

ONT21:00Ontario

£500

Delta

1 Apr

ONT06:00Ontario

22h 10m

1 stop

LHR12:10London Heathrow

10 Apr

LHR06:15London Heathrow

25h 36m

2 stops

ONT23:51Ontario

£505

Delta

15 Apr

ONT11:53Ontario

19h 42m

1 stop

LHR15:35London Heathrow

5 May

LHR09:55London Heathrow

19h 05m

2 stops

ONT21:00Ontario

£507

United Airlines flights from Ontario to London

Our best United Airlines deals on Ontario to London flight tickets

United Airlines

11 Mar

ONT13:40Ontario

15h 20m

1 stop

LHR12:00London Heathrow

24 Mar

LHR10:05London Heathrow

14h 36m

1 stop

ONT17:41Ontario

£509

United Airlines

15 Apr

ONT11:05Ontario

16h 40m

2 stops

LHR11:45London Heathrow

5 May

LHR09:30London Heathrow

20h 28m

2 stops

ONT21:58Ontario

£512

United Airlines

2 May

ONT13:30Ontario

24h 05m

2 stops

LHR21:35London Heathrow

11 May

LHR16:25London Heathrow

36h 11m

2 stops

ONT20:36Ontario

£518

Fly from

Fly to

Route

Depart

Return

Price

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 8/4

14:08-14:25

1 stop16h 17m

London Heathrow

Wed 29/4

11:30-23:46

2 stops20h 16m

£496

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 23/3

06:00-10:30

1 stop21h 30m

London Heathrow

Thu 2/4

06:30-23:51

2 stops25h 21m

£500

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 1/4

06:00-12:10

1 stop22h 10m

London Heathrow

Fri 10/4

06:15-23:51

2 stops25h 36m

£505

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 15/4

11:53-15:35

1 stop19h 42m

London Heathrow

Tue 5/5

09:55-21:00

2 stops19h 05m

£507

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 11/3

13:40-12:00

1 stop15h 20m

London Heathrow

Tue 24/3

10:05-17:41

1 stop14h 36m

£509

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sat 22/8

13:33-07:25

1 stop33h 52m

London Heathrow

Tue 8/9

09:30-21:21

2 stops19h 51m

£512

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 11/3

06:00-10:30

1 stop21h 30m

London Heathrow

Wed 25/3

11:40-23:51

2 stops19h 11m

£512

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 1/4

10:56-07:55

1 stop12h 59m

London Heathrow

Tue 14/4

10:05-16:22

1 stop14h 17m

£513

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 12/8

07:00-16:00

2 stops25h 00m

London Gatwick

Sun 23/8

10:25-16:14

2 stops37h 49m

£628

OntarioLondon

ONT - LCY

ONTLCY

Ontario

Tue 31/3

10:56-15:15

2 stops20h 19m

London City

Wed 29/4

09:50-23:46

2 stops21h 56m

£884

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 February. Flight prices, which tend to average around £484, are often lower during this time because this is during the off-season. The month of March is another great option to travel to London, with average flight prices from Ontario averaging around £505.

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 £489. When flying out on a Sunday, 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 £506. Flights at midday are often more expensive, with an average ticket price of £638.

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

Ipswich

Canterbury

Ilford

Guildford

Chelmsford

Wembley

Hayes

Dover

Folkestone

Worthing

Colchester

Bedford

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.

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Cheap flights from Ontario to London from £220

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 20/4. 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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Big names, great deals

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Delta flights from Ontario to London

Our best Delta deals on Ontario to London flight tickets

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Our best United Airlines 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 typical price of a round-trip flight between Ontario and 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

Find info about flight duration, direct flights, and airports for your flight from Ontario to London

Fastest flight time

Direct flights

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

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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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