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Cheap flights from Ontario to London from £235

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Ontario to London

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:01 - 21:40ONT  Ontario-LHR London Heathrow
25h 39m2 stops San Francisco Kastrup Copenhagen
Multiple Airlines Logo
21:05 - 19:28LHR  London Heathrow-ONT Ontario
30h 23m3 stops Stockholm Arlanda Kastrup Copenhagen San Francisco
£412Multiple Airlines
Mon, 2 Nov - Wed, 11 Nov
Multiple Airlines Logo
12:01 - 18:30ONT  Ontario-LHR London Heathrow
22h 29m2 stops San Francisco Kastrup Copenhagen
Multiple Airlines Logo
06:40 - 09:40LHR  London Heathrow-ONT Ontario
35h 00m3 stops Kastrup Copenhagen San Francisco Las Vegas Harry Reid Intl
£437Multiple Airlines
Thu, 5 Nov - Tue, 10 Nov
Multiple Airlines Logo
12:01 - 18:50ONT  Ontario-LHR London Heathrow
22h 49m3 stops San Francisco Kastrup Copenhagen Oslo Gardermoen
Multiple Airlines Logo
06:40 - 19:28LHR  London Heathrow-ONT Ontario
20h 48m2 stops Kastrup Copenhagen San Francisco
£439Multiple Airlines
Mon, 9 Nov - Fri, 13 Nov
Multiple Airlines Logo
12:01 - 16:00ONT  Ontario-LHR London Heathrow
19h 59m2 stops San Francisco Kastrup Copenhagen
Multiple Airlines Logo
06:40 - 19:28LHR  London Heathrow-ONT Ontario
20h 48m2 stops Kastrup Copenhagen San Francisco
£442Multiple Airlines
Mon, 9 Nov - Fri, 13 Nov
Multiple Airlines Logo
12:01 - 16:00ONT  Ontario-LHR London Heathrow
19h 59m2 stops San Francisco Kastrup Copenhagen
Multiple Airlines Logo
18:40 - 19:28LHR  London Heathrow-ONT Ontario
32h 48m2 stops Kastrup Copenhagen San Francisco
£448Multiple Airlines
Mon, 9 Nov - Wed, 18 Nov
Multiple Airlines Logo
12:01 - 18:50ONT  Ontario-LHR London Heathrow
22h 49m3 stops San Francisco Kastrup Copenhagen Oslo Gardermoen
Multiple Airlines Logo
17:00 - 19:28LHR  London Heathrow-ONT Ontario
34h 28m2 stops Kastrup Copenhagen San Francisco
£448Multiple Airlines
Mon, 9 Nov - Wed, 18 Nov
Multiple Airlines Logo
12:01 - 18:50ONT  Ontario-LHR London Heathrow
22h 49m3 stops San Francisco Kastrup Copenhagen Oslo Gardermoen
Multiple Airlines Logo
06:40 - 19:28LHR  London Heathrow-ONT Ontario
20h 48m2 stops Kastrup Copenhagen San Francisco
£449Multiple Airlines
Sun, 8 Nov - Thu, 12 Nov
Multiple Airlines Logo
12:01 - 21:40ONT  Ontario-LHR London Heathrow
25h 39m2 stops San Francisco Kastrup Copenhagen
Multiple Airlines Logo
06:40 - 19:28LHR  London Heathrow-ONT Ontario
20h 48m2 stops Kastrup Copenhagen San Francisco
£452Multiple Airlines
Sun, 8 Nov - Thu, 12 Nov
Multiple Airlines Logo
12:01 - 21:40ONT  Ontario-LHR London Heathrow
25h 39m2 stops San Francisco Kastrup Copenhagen
Multiple Airlines Logo
06:40 - 19:28LHR  London Heathrow-ONT Ontario
20h 48m2 stops Kastrup Copenhagen San Francisco
£454Multiple Airlines
Sun, 8 Nov - Thu, 12 Nov
Multiple Airlines Logo
12:01 - 18:50ONT  Ontario-LHR London Heathrow
22h 49m3 stops San Francisco Kastrup Copenhagen Oslo Gardermoen
Multiple Airlines Logo
06:40 - 19:28LHR  London Heathrow-ONT Ontario
20h 48m2 stops Kastrup Copenhagen San Francisco
£454Multiple Airlines
Sun, 8 Nov - Thu, 12 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
4 Oct
ONT06:02Ontario
25h 03m
1 stop
LHR15:05London Heathrow
14 Oct
LHR17:00London Heathrow
25h 17m
1 stop
ONT10:17Ontario
£541
Alaska Airlines
4 Oct
ONT06:02Ontario
25h 03m
1 stop
LHR15:05London Heathrow
14 Oct
LHR17:00London Heathrow
28h 16m
1 stop
ONT13:16Ontario
£544
Alaska Airlines
28 Sept
ONT15:14Ontario
15h 51m
1 stop
LHR15:05London Heathrow
13 Oct
LHR17:00London Heathrow
33h 00m
1 stop
ONT18:00Ontario
£545

Virgin Atlantic flights from Ontario to London

Our best Virgin Atlantic deals on Ontario to London flight tickets
Virgin Atlantic
4 Nov
ONT06:00Ontario
17h 05m
2 stops
LHR07:05London Heathrow
11 Nov
LHR12:20London Heathrow
18h 40m
1 stop
ONT23:00Ontario
£540
Virgin Atlantic
4 Nov
ONT13:35Ontario
12h 25m
1 stop
LHR10:00London Heathrow
11 Nov
LHR12:20London Heathrow
18h 40m
1 stop
ONT23:00Ontario
£542
Virgin Atlantic
3 Nov
ONT07:07Ontario
15h 18m
1 stop
LHR06:25London Heathrow
24 Nov
LHR12:20London Heathrow
18h 40m
1 stop
ONT23:00Ontario
£553

momondo Fare Finder

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

Fly from

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Route

Depart

Return

Price

Cheapest return flight

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 2/11

12:01-21:40

2 stops25h 39m

London Heathrow

Wed 11/11

21:05-19:28

3 stops30h 23m

£412

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Thu 5/11

12:01-18:30

2 stops22h 29m

London Heathrow

Tue 10/11

06:40-09:40

3 stops35h 00m

£437

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 9/11

12:01-18:50

3 stops22h 49m

London Heathrow

Fri 13/11

06:40-19:28

2 stops20h 48m

£439
Fastest return journey

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 9/11

12:01-16:00

2 stops19h 59m

London Heathrow

Fri 13/11

06:40-19:28

2 stops20h 48m

£442

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 9/11

12:01-16:00

2 stops19h 59m

London Heathrow

Wed 18/11

18:40-19:28

2 stops32h 48m

£448

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 9/11

12:01-18:50

3 stops22h 49m

London Heathrow

Wed 18/11

17:00-19:28

2 stops34h 28m

£448

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 8/11

12:01-18:50

3 stops22h 49m

London Heathrow

Thu 12/11

06:40-19:28

2 stops20h 48m

£449

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 8/11

12:01-21:40

2 stops25h 39m

London Heathrow

Thu 12/11

06:40-19:28

2 stops20h 48m

£452

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 8/11

12:01-21:40

2 stops25h 39m

London Heathrow

Thu 12/11

06:40-19:28

2 stops20h 48m

£454

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 8/11

12:01-18:50

3 stops22h 49m

London Heathrow

Thu 12/11

06:40-19:28

2 stops20h 48m

£454

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

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

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 £708 to £866.
The lowest price recently found on this route was £412.

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 £514, 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 £524.

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 £703. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to London for around £893.

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 £639. Flights in the afternoon are often more expensive, with an average ticket price of £793.

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 25m

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 £412.
The fastest flight from Ontario to London takes 12h 25m
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 25m 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.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Wembley
Gatwick
Milton Keynes
Southend-on-Sea
Luton
Slough
Ipswich
Maidstone
Folkestone
Hastings
Ilford
Canterbury
Chichester
Hayes
Bedford
Guildford
Colchester
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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Find better results for your trip to the United Kingdom

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