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Cheap flights from Ontario to London from £234

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 - 16:00ONT  Ontario-LHR London Heathrow
19h 59m2 stops San Francisco Kastrup Copenhagen
Multiple Airlines Logo
06:40 - 00:24LHR  London Heathrow-ONT Ontario
25h 44m2 stops Kastrup Copenhagen San Francisco
£471Multiple Airlines
Mon, 16 Nov - Sat, 21 Nov
Multiple Airlines Logo
12:01 - 16:00ONT  Ontario-LHR London Heathrow
19h 59m2 stops San Francisco Kastrup Copenhagen
Multiple Airlines Logo
06:40 - 00:24LHR  London Heathrow-ONT Ontario
25h 44m2 stops Kastrup Copenhagen San Francisco
£473Multiple Airlines
Mon, 16 Nov - Tue, 24 Nov
Multiple Airlines Logo
08:05 - 18:30ONT  Ontario-LHR London Heathrow
26h 25m3 stops Las Vegas Harry Reid Intl San Francisco Kastrup Copenhagen
Multiple Airlines Logo
06:40 - 23:23LHR  London Heathrow-ONT Ontario
24h 43m2 stops Kastrup Copenhagen San Francisco
£492Multiple Airlines
Tue, 1 Dec - Mon, 7 Dec
Multiple Airlines Logo
12:01 - 16:00ONT  Ontario-LHR London Heathrow
19h 59m2 stops San Francisco Kastrup Copenhagen
Multiple Airlines Logo
06:40 - 07:20LHR  London Heathrow-ONT Ontario
32h 40m3 stops Kastrup Copenhagen San Francisco Las Vegas Harry Reid Intl
£503Multiple Airlines
Mon, 16 Nov - Tue, 24 Nov
Multiple Airlines Logo
10:35 - 21:40ONT  Ontario-LHR London Heathrow
27h 05m3 stops Las Vegas Harry Reid Intl San Francisco Kastrup Copenhagen
Multiple Airlines Logo
06:40 - 00:24LHR  London Heathrow-ONT Ontario
25h 44m2 stops Kastrup Copenhagen San Francisco
£513Multiple Airlines
Tue, 17 Nov - Tue, 24 Nov
Multiple Airlines Logo
22:40 - 16:00ONT  Ontario-LHR London Heathrow
33h 20m3 stops Las Vegas Harry Reid Intl San Francisco Kastrup Copenhagen
Multiple Airlines Logo
19:30 - 23:23LHR  London Heathrow-ONT Ontario
35h 53m2 stops Kastrup Copenhagen San Francisco
£518Multiple Airlines
Thu, 26 Nov - Wed, 9 Dec
Multiple Airlines Logo
22:40 - 16:00ONT  Ontario-LHR London Heathrow
33h 20m3 stops Las Vegas Harry Reid Intl San Francisco Kastrup Copenhagen
Multiple Airlines Logo
19:30 - 23:23LHR  London Heathrow-ONT Ontario
35h 53m2 stops Kastrup Copenhagen San Francisco
£547Multiple Airlines
Thu, 26 Nov - Wed, 9 Dec
Multiple Airlines Logo
12:01 - 16:00ONT  Ontario-LHR London Heathrow
19h 59m2 stops San Francisco Kastrup Copenhagen
Multiple Airlines Logo
06:40 - 08:30LHR  London Heathrow-ONT Ontario
33h 50m3 stops Kastrup Copenhagen San Francisco Las Vegas Harry Reid Intl
£557Multiple Airlines
Mon, 16 Nov - Sat, 21 Nov
Multiple Airlines Logo
20:35 - 16:00ONT  Ontario-LHR London Heathrow
35h 25m3 stops Las Vegas Harry Reid Intl San Francisco Kastrup Copenhagen
Multiple Airlines Logo
19:30 - 23:19LHR  London Heathrow-ONT Ontario
35h 49m2 stops Kastrup Copenhagen San Francisco
£563Multiple Airlines
Mon, 16 Nov - Tue, 1 Dec
United Airlines Logo
18:35 - 07:25ONT  Ontario-LHR London Heathrow
28h 50m1 stop San Francisco
United Airlines Logo
06:50 - 18:44LHR  London Heathrow-ONT Ontario
19h 54m2 stops Brussels Bruxelles-National Chicago O'Hare Intl
£568United Airlines
Tue, 2 Mar - Fri, 5 Mar

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United Airlines flights from Ontario to London

Our best United Airlines deals on Ontario to London flight tickets
United Airlines
2 Mar
ONT18:35Ontario
28h 50m
1 stop
LHR07:25London Heathrow
5 Mar
LHR06:50London Heathrow
19h 54m
2 stops
ONT18:44Ontario
£568
United Airlines
10 Jan
ONT13:42Ontario
22h 53m
2 stops
LHR20:35London Heathrow
12 Jan
LHR17:30London Heathrow
34h 31m
2 stops
ONT20:01Ontario
£576
United Airlines
2 Mar
ONT13:00Ontario
34h 40m
2 stops
LHR07:40London Heathrow
5 Mar
LHR06:50London Heathrow
19h 54m
2 stops
ONT18:44Ontario
£580

Delta flights from Ontario to London

Our best Delta deals on Ontario to London flight tickets
Delta
10 Jan
ONT07:00Ontario
15h 25m
1 stop
LHR06:25London Heathrow
12 Jan
LHR11:45London Heathrow
36h 27m
2 stops
ONT16:12Ontario
£661
Delta
9 Jan
ONT12:00Ontario
35h 50m
1 stop
LHR07:50London Heathrow
12 Jan
LHR11:45London Heathrow
36h 27m
2 stops
ONT16:12Ontario
£665
Delta
26 Oct
ONT06:00Ontario
18h 45m
2 stops
LHR07:45London Heathrow
3 Nov
LHR06:30London Heathrow
21h 00m
2 stops
ONT19:30Ontario
£749

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
Fastest return journey

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 16/11

12:01-16:00

2 stops19h 59m

London Heathrow

Sat 21/11

06:40-00:24

2 stops25h 44m

£471

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 16/11

12:01-16:00

2 stops19h 59m

London Heathrow

Tue 24/11

06:40-00:24

2 stops25h 44m

£473

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 1/12

08:05-18:30

3 stops26h 25m

London Heathrow

Mon 7/12

06:40-23:23

2 stops24h 43m

£492

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 16/11

12:01-16:00

2 stops19h 59m

London Heathrow

Tue 24/11

06:40-07:20

3 stops32h 40m

£503

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 17/11

10:35-21:40

3 stops27h 05m

London Heathrow

Tue 24/11

06:40-00:24

2 stops25h 44m

£513

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Thu 26/11

22:40-16:00

3 stops33h 20m

London Heathrow

Wed 9/12

19:30-23:23

2 stops35h 53m

£518

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Thu 26/11

22:40-16:00

3 stops33h 20m

London Heathrow

Wed 9/12

19:30-23:23

2 stops35h 53m

£547

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 16/11

12:01-16:00

2 stops19h 59m

London Heathrow

Sat 21/11

06:40-08:30

3 stops33h 50m

£557

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 16/11

20:35-16:00

3 stops35h 25m

London Heathrow

Tue 1/12

19:30-23:19

2 stops35h 49m

£563

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 2/3

18:35-07:25

1 stop28h 50m

London Heathrow

Fri 5/3

06:50-18:44

2 stops19h 54m

£568

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 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 £520, 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 £559.

What is the cheapest day to depart on your flight to London?

Our data shows that Tuesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £722. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to London for around £976.

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 £652. Flights in the afternoon are often more expensive, with an average ticket price of £843.

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

£234

Fastest flight time

12h 20m

Direct flights

None
The best one-way flight to London from Ontario in the past 72 hours is £234. The best return flight deal from Ontario to London found on momondo in the last 72 hours is £471.
The fastest flight from Ontario to London takes 12h 20m
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 20m 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
Ipswich
Slough
Maidstone
Folkestone
Hastings
Ilford
Canterbury
Chichester
Colchester
Hayes
Guildford
Bedford
Worthing
Harlow

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