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Cheap flights from Ontario to London from £221

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.
Alaska Airlines Logo
11:36 - 12:20ONT  Ontario-LHR London Heathrow
16h 44m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
14:45 - 10:38LHR  London Heathrow-ONT Ontario
27h 53m1 stop Seattle/Tacoma Intl
£589Alaska Airlines
Wed, 20 Jan - Mon, 25 Jan
Multiple Airlines Logo
14:22 - 12:00ONT  Ontario-LHR London Heathrow
13h 38m1 stop Dallas/Fort Worth
Multiple Airlines Logo
14:45 - 22:39LHR  London Heathrow-ONT Ontario
15h 54m1 stop Seattle/Tacoma Intl
£595Multiple Airlines
Wed, 9 Dec - Mon, 14 Dec
Alaska Airlines Logo
11:36 - 12:20ONT  Ontario-LHR London Heathrow
16h 44m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
14:45 - 22:41LHR  London Heathrow-ONT Ontario
15h 56m1 stop Seattle/Tacoma Intl
£596Alaska Airlines
Tue, 12 Jan - Tue, 26 Jan
Multiple Airlines Logo
23:05 - 20:45ONT  Ontario-LHR London Heathrow
13h 40m1 stop New York John F Kennedy Intl
Multiple Airlines Logo
17:00 - 23:42LHR  London Heathrow-ONT Ontario
14h 42m1 stop Seattle/Tacoma Intl
£596Multiple Airlines
Mon, 12 Oct - Mon, 19 Oct
Multiple Airlines Logo
12:42 - 10:00ONT  Ontario-LHR London Heathrow
13h 18m1 stop Dallas/Fort Worth
Multiple Airlines Logo
14:45 - 22:39LHR  London Heathrow-ONT Ontario
15h 54m1 stop Seattle/Tacoma Intl
£597Multiple Airlines
Mon, 7 Dec - Wed, 16 Dec
Multiple Airlines Logo
07:00 - 06:50ONT  Ontario-LHR London Heathrow
15h 50m1 stop Dallas/Fort Worth
Multiple Airlines Logo
14:45 - 22:39LHR  London Heathrow-ONT Ontario
15h 54m1 stop Seattle/Tacoma Intl
£597Multiple Airlines
Tue, 1 Dec - Wed, 16 Dec
Alaska Airlines Logo
06:00 - 12:20ONT  Ontario-LHR London Heathrow
22h 20m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
14:45 - 22:41LHR  London Heathrow-ONT Ontario
15h 56m1 stop Seattle/Tacoma Intl
£597Alaska Airlines
Mon, 4 Jan - Sun, 10 Jan
Alaska Airlines Logo
11:36 - 12:20ONT  Ontario-LHR London Heathrow
16h 44m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
14:45 - 22:41LHR  London Heathrow-ONT Ontario
15h 56m1 stop Seattle/Tacoma Intl
£597Alaska Airlines
Sun, 17 Jan - Mon, 25 Jan
Alaska Airlines Logo
11:36 - 12:20ONT  Ontario-LHR London Heathrow
16h 44m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
14:45 - 22:41LHR  London Heathrow-ONT Ontario
15h 56m1 stop Seattle/Tacoma Intl
£597Alaska Airlines
Sun, 17 Jan - Sat, 23 Jan
Multiple Airlines Logo
11:26 - 11:50ONT  Ontario-LHR London Heathrow
16h 24m2 stops San Francisco Vancouver Intl
Multiple Airlines Logo
14:45 - 22:39LHR  London Heathrow-ONT Ontario
15h 54m1 stop Seattle/Tacoma Intl
£597Multiple Airlines
Tue, 1 Dec - Wed, 16 Dec

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JetBlue flights from Ontario to London

Our best JetBlue deals on Ontario to London flight tickets
JetBlue
15 Sept
ONT22:39Ontario
14h 06m
1 stop
LHR20:45London Heathrow
25 Sept
LHR08:15London Heathrow
20h 42m
1 stop
ONT20:57Ontario
£647
JetBlue
20 Sept
ONT22:39Ontario
14h 06m
1 stop
LHR20:45London Heathrow
3 Oct
LHR08:15London Heathrow
20h 42m
1 stop
ONT20:57Ontario
£661
JetBlue
21 Sept
ONT22:39Ontario
14h 06m
1 stop
LHR20:45London Heathrow
1 Oct
LHR11:55London Heathrow
17h 02m
1 stop
ONT20:57Ontario
£662

United Airlines flights from Ontario to London

Our best United Airlines deals on Ontario to London flight tickets
United Airlines
6 Sept
ONT13:18Ontario
15h 17m
1 stop
LHR12:35London Heathrow
15 Sept
LHR09:30London Heathrow
35h 20m
2 stops
ONT12:50Ontario
£790
United Airlines
8 Sept
ONT13:56Ontario
13h 14m
1 stop
LHR11:10London Heathrow
17 Sept
LHR17:40London Heathrow
37h 19m
2 stops
ONT22:59Ontario
£792
United Airlines
9 Sept
ONT13:56Ontario
13h 14m
1 stop
LHR11:10London Heathrow
23 Sept
LHR13:00London Heathrow
15h 01m
1 stop
ONT20:01Ontario
£804

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 20/1

11:36-12:20

1 stop16h 44m

London Heathrow

Mon 25/1

14:45-10:38

1 stop27h 53m

£589

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 9/12

14:22-12:00

1 stop13h 38m

London Heathrow

Mon 14/12

14:45-22:39

1 stop15h 54m

£595

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 12/1

11:36-12:20

1 stop16h 44m

London Heathrow

Tue 26/1

14:45-22:41

1 stop15h 56m

£596
Fastest return journey

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 12/10

23:05-20:45

1 stop13h 40m

London Heathrow

Mon 19/10

17:00-23:42

1 stop14h 42m

£596

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 7/12

12:42-10:00

1 stop13h 18m

London Heathrow

Wed 16/12

14:45-22:39

1 stop15h 54m

£597

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 1/12

07:00-06:50

1 stop15h 50m

London Heathrow

Wed 16/12

14:45-22:39

1 stop15h 54m

£597

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 4/1

06:00-12:20

1 stop22h 20m

London Heathrow

Sun 10/1

14:45-22:41

1 stop15h 56m

£597

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 17/1

11:36-12:20

1 stop16h 44m

London Heathrow

Mon 25/1

14:45-22:41

1 stop15h 56m

£597

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 17/1

11:36-12:20

1 stop16h 44m

London Heathrow

Sat 23/1

14:45-22:41

1 stop15h 56m

£597

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 1/12

11:26-11:50

2 stops16h 24m

London Heathrow

Wed 16/12

14:45-22:39

1 stop15h 54m

£597

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 £678 to £679.
The lowest price recently found on this route was £589.

What is the cheapest month to fly to London?

The cheapest month to fly to London from Ontario is in March. Flight prices, which tend to average around £480, are often lower during this time because this is during the off-season. The month of February is another great option to travel to London, with average flight prices from Ontario averaging around £481.

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 £651. 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 £808.

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 £509. Flights in the afternoon are often more expensive, with an average ticket price of £738.

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

£221

Fastest flight time

13h 00m

Direct flights

None
The best one-way flight to London from Ontario in the past 72 hours is £221. The best return flight deal from Ontario to London found on momondo in the last 72 hours is £589.
The fastest flight from Ontario to London takes 13h 00m
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 13h 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.

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
Guildford
Bedford
Harlow
Colchester
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