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

Alaska Airlines, Delta, and United Airlines 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 49% 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.

£239 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 low for flights on this route. Typical prices usually range from £1,158 to £977. The lowest price recently found on this route was £618.

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.

12:35 - 14:25

ONT

LHR

17h 50m

1 stop

11:30 - 23:06

LHR

ONT

19h 36m

2 stops

£618Iberia

Wed, 7 Oct - Tue, 13 Oct

13:05 - 15:05

ONT

LHR

18h 00m

1 stop

10:50 - 23:06

LHR

ONT

20h 16m

2 stops

£619Multiple Airlines

Sun, 27 Sep - Wed, 7 Oct

10:25 - 14:25

ONT

LHR

20h 00m

1 stop

10:50 - 23:06

LHR

ONT

20h 16m

2 stops

£620Multiple Airlines

Tue, 6 Oct - Thu, 15 Oct

10:25 - 09:05

ONT

LHR

14h 40m

1 stop

08:55 - 20:09

LHR

ONT

19h 14m

1 stop

£621British Airways

Mon, 21 Sep - Tue, 29 Sep

14:22 - 12:50

ONT

LHR

14h 28m

1 stop

08:55 - 22:37

LHR

ONT

21h 42m

1 stop

£621British Airways

Wed, 9 Sep - Sat, 19 Sep

10:47 - 12:15

ONT

LHR

17h 28m

1 stop

19:40 - 22:23

LHR

ONT

34h 43m

2 stops

£623Multiple Airlines

Wed, 11 Nov - Wed, 18 Nov

05:00 - 09:40

ONT

LHR

20h 40m

1 stop

07:30 - 20:31

LHR

ONT

21h 01m

2 stops

£624United Airlines

Sun, 11 Oct - Tue, 13 Oct

07:05 - 09:25

ONT

LGW

18h 20m

2 stops

10:25 - 22:40

LGW

ONT

20h 15m

2 stops

£680Delta

Wed, 23 Sep - Mon, 28 Sep

07:05 - 09:25

ONT

LGW

18h 20m

2 stops

10:25 - 22:40

LGW

ONT

20h 15m

2 stops

£696Delta

Wed, 23 Sep - Mon, 28 Sep

07:00 - 10:40

ONT

LGW

19h 40m

2 stops

14:30 - 11:43

LGW

ONT

29h 13m

2 stops

£847American Airlines

Sat, 1 Aug - Sun, 9 Aug

Iberia flights from Ontario to London

Our best Iberia deals on Ontario to London flight tickets

Iberia

7 Oct

ONT12:35Ontario

17h 50m

1 stop

LHR14:25London Heathrow

13 Oct

LHR11:30London Heathrow

19h 36m

2 stops

ONT23:06Ontario

£618

Iberia

5 Sept

ONT14:43Ontario

31h 37m

1 stop

LHR06:20London Heathrow

3 Oct

LHR20:00London Heathrow

35h 36m

2 stops

ONT23:36Ontario

£636

Iberia

1 Oct

ONT14:22Ontario

14h 28m

1 stop

LHR12:50London Heathrow

31 Oct

LHR19:05London Heathrow

22h 52m

2 stops

ONT10:57Ontario

£656

British Airways flights from Ontario to London

Our best British Airways deals on Ontario to London flight tickets

British Airways

21 Sept

ONT10:25Ontario

14h 40m

1 stop

LHR09:05London Heathrow

29 Sept

LHR08:55London Heathrow

19h 14m

1 stop

ONT20:09Ontario

£621

British Airways

9 Sept

ONT14:22Ontario

14h 28m

1 stop

LHR12:50London Heathrow

19 Sept

LHR08:55London Heathrow

21h 42m

1 stop

ONT22:37Ontario

£621

British Airways

1 Nov

ONT16:47Ontario

12h 28m

1 stop

LHR13:15London Heathrow

14 Nov

LHR15:00London Heathrow

15h 23m

1 stop

ONT22:23Ontario

£632

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 7/10

12:35-14:25

1 stop17h 50m

London Heathrow

Tue 13/10

11:30-23:06

2 stops19h 36m

£618

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 27/9

13:05-15:05

1 stop18h 00m

London Heathrow

Wed 7/10

10:50-23:06

2 stops20h 16m

£619

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 6/10

10:25-14:25

1 stop20h 00m

London Heathrow

Thu 15/10

10:50-23:06

2 stops20h 16m

£620

Fastest return journey

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 21/9

10:25-09:05

1 stop14h 40m

London Heathrow

Tue 29/9

08:55-20:09

1 stop19h 14m

£621

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 9/9

14:22-12:50

1 stop14h 28m

London Heathrow

Sat 19/9

08:55-22:37

1 stop21h 42m

£621

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 11/11

10:47-12:15

1 stop17h 28m

London Heathrow

Wed 18/11

19:40-22:23

2 stops34h 43m

£623

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 11/10

05:00-09:40

1 stop20h 40m

London Heathrow

Tue 13/10

07:30-20:31

2 stops21h 01m

£624

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 23/9

07:05-09:25

2 stops18h 20m

London Gatwick

Mon 28/9

10:25-22:40

2 stops20h 15m

£680

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 23/9

07:05-09:25

2 stops18h 20m

London Gatwick

Mon 28/9

10:25-22:40

2 stops20h 15m

£696

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Sat 1/8

07:00-10:40

2 stops19h 40m

London Gatwick

Sun 9/8

14:30-11:43

2 stops29h 13m

£847

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 £188, 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 £211.

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 £540. 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 £668.

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 £576. Flights in the evening are often more expensive, with an average ticket price of £614.

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 22m
Direct flights	None

The fastest flight from Ontario to London takes 12h 22m

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

Search flight deals

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 22m 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

Gatwick

Luton

Wembley

Slough

Maidstone

Southend-on-Sea

Ipswich

Ilford

Canterbury

Guildford

Hayes

Folkestone

Chelmsford

Dover

Bedford

Chichester

Harlow

Colchester

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.

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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Tue 7/7

Tue 14/7

Email me momondo's favourite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United Kingdom

Nearby airports

Airlines

Cabin classes

Other United Kingdom destinations

Complete your trip

Feeling lucky

Fly into one of these airports located in London

London City Airport

London Gatwick Airport

London Heathrow Airport

London Luton Airport

London Southend Airport

London Stansted Airport

Cheap flights from Ontario to London from £239

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 11/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Ontario to London

Cheap return flights

Cheap one-way flights

Cheap last-minute flights

Iberia flights from Ontario to London

Our best Iberia 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

momondo Fare Finder

Use the filters below to find and compare flights from Ontario to London that are best for you.

See travel insights to London from

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

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.

Popular Cities in the United Kingdom

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

Complete your trip to London

Explore popular destinations other users love

According to popular flight searches on momondo this year