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Cheap flights from Ontario to London from £219

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
06:00 - 09:20ONT  Ontario-LHR London Heathrow
19h 20m2 stops San Francisco Calgary
Multiple Airlines Logo
14:45 - 15:20LHR  London Heathrow-ONT Ontario
32h 35m1 stop Seattle/Tacoma Intl
£586Multiple Airlines
Sun, 10 Jan - Sat, 16 Jan
Multiple Airlines Logo
06:00 - 11:50ONT  Ontario-LHR London Heathrow
21h 50m2 stops San Francisco Vancouver Intl
Multiple Airlines Logo
14:45 - 22:41LHR  London Heathrow-ONT Ontario
15h 56m1 stop Seattle/Tacoma Intl
£588Multiple Airlines
Mon, 11 Jan - Wed, 20 Jan
Alaska Airlines Logo
06:00 - 12:20ONT  Ontario-LHR London Heathrow
22h 20m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
14:45 - 23:04LHR  London Heathrow-ONT Ontario
16h 19m1 stop Seattle/Tacoma Intl
£591Alaska Airlines
Sun, 15 Nov - Sun, 22 Nov
Alaska Airlines Logo
06:00 - 12:20ONT  Ontario-LHR London Heathrow
22h 20m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
14:45 - 22:39LHR  London Heathrow-ONT Ontario
15h 54m1 stop Seattle/Tacoma Intl
£592Alaska Airlines
Mon, 23 Nov - Fri, 4 Dec
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
£593Multiple Airlines
Wed, 17 Feb - Thu, 11 Mar
Multiple Airlines Logo
23:05 - 20:45ONT  Ontario-LHR London Heathrow
13h 40m1 stop New York John F Kennedy Intl
Multiple Airlines Logo
14:45 - 13:16LHR  London Heathrow-ONT Ontario
29h 31m1 stop Seattle/Tacoma Intl
£596Multiple Airlines
Fri, 16 Oct - Sun, 25 Oct
Alaska Airlines Logo
12:02 - 12:20ONT  Ontario-LHR London Heathrow
16h 18m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
14:45 - 15:05LHR  London Heathrow-ONT Ontario
32h 20m1 stop Seattle/Tacoma Intl
£596Alaska Airlines
Tue, 17 Nov - Tue, 24 Nov
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 - 10:17LHR  London Heathrow-ONT Ontario
25h 17m1 stop Seattle/Tacoma Intl
£597Multiple Airlines
Tue, 13 Oct - Tue, 20 Oct
Alaska Airlines Logo
16:16 - 12:20ONT  Ontario-LHR London Heathrow
36h 04m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
14:45 - 22:41LHR  London Heathrow-ONT Ontario
15h 56m1 stop Seattle/Tacoma Intl
£602Alaska Airlines
Sat, 16 Jan - Sun, 24 Jan
Multiple Airlines Logo
10:30 - 08:15ONT  Ontario-LHR London Heathrow
13h 45m1 stop Dallas/Fort Worth
Multiple Airlines Logo
12:05 - 21:59LHR  London Heathrow-ONT Ontario
17h 54m1 stop Houston George Bush Intcntl
£610Multiple Airlines
Tue, 24 Nov - Tue, 1 Dec

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British Airways flights from Ontario to London

Our best British Airways deals on Ontario to London flight tickets
British Airways
2 Dec
ONT14:22Ontario
13h 38m
1 stop
LHR12:00London Heathrow
15 Dec
LHR14:45London Heathrow
16h 12m
1 stop
ONT22:57Ontario
£616
British Airways
13 Dec
ONT12:42Ontario
13h 18m
1 stop
LHR10:00London Heathrow
26 Dec
LHR14:45London Heathrow
15h 17m
1 stop
ONT22:02Ontario
£636
British Airways
22 Nov
ONT12:42Ontario
13h 18m
1 stop
LHR10:00London Heathrow
30 Nov
LHR13:15London Heathrow
13h 50m
1 stop
ONT19:05Ontario
£637

JetBlue flights from Ontario to London

Our best JetBlue deals on Ontario to London flight tickets
JetBlue
6 Oct
ONT22:42Ontario
14h 03m
1 stop
LHR20:45London Heathrow
17 Oct
LHR11:55London Heathrow
18h 14m
1 stop
ONT22:09Ontario
£651
JetBlue
5 Sept
ONT23:13Ontario
13h 32m
1 stop
LHR20:45London Heathrow
11 Sept
LHR11:55London Heathrow
17h 02m
1 stop
ONT20:57Ontario
£657
JetBlue
5 Sept
ONT23:13Ontario
13h 32m
1 stop
LHR20:45London Heathrow
19 Sept
LHR08:15London Heathrow
20h 42m
1 stop
ONT20:57Ontario
£657

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

Sun 10/1

06:00-09:20

2 stops19h 20m

London Heathrow

Sat 16/1

14:45-15:20

1 stop32h 35m

£586

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 11/1

06:00-11:50

2 stops21h 50m

London Heathrow

Wed 20/1

14:45-22:41

1 stop15h 56m

£588

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 15/11

06:00-12:20

1 stop22h 20m

London Heathrow

Sun 22/11

14:45-23:04

1 stop16h 19m

£591

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 23/11

06:00-12:20

1 stop22h 20m

London Heathrow

Fri 4/12

14:45-22:39

1 stop15h 54m

£592
Fastest return journey

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 17/2

14:22-12:00

1 stop13h 38m

London Heathrow

Thu 11/3

14:45-22:39

1 stop15h 54m

£593

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Fri 16/10

23:05-20:45

1 stop13h 40m

London Heathrow

Sun 25/10

14:45-13:16

1 stop29h 31m

£596

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 17/11

12:02-12:20

1 stop16h 18m

London Heathrow

Tue 24/11

14:45-15:05

1 stop32h 20m

£596

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 13/10

23:05-20:45

1 stop13h 40m

London Heathrow

Tue 20/10

17:00-10:17

1 stop25h 17m

£597

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sat 16/1

16:16-12:20

1 stop36h 04m

London Heathrow

Sun 24/1

14:45-22:41

1 stop15h 56m

£602

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 24/11

10:30-08:15

1 stop13h 45m

London Heathrow

Tue 1/12

12:05-21:59

1 stop17h 54m

£610

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 £676 to £736.
The lowest price recently found on this route was £586.

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 £478, 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 £479.

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 £646. 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 £778.

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 £507. Flights in the afternoon are often more expensive, with an average ticket price of £712.

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

£219

Fastest flight time

13h 17m

Direct flights

None
The best one-way flight to London from Ontario in the past 72 hours is £219. The best return flight deal from Ontario to London found on momondo in the last 72 hours is £586.
The fastest flight from Ontario to London takes 13h 17m
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 17m 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
Luton
Southend-on-Sea
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