Cheap flights from Ontario to London from $315

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 9/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Virgin Atlantic Logo
9:50 am - 9:50 amONT-LHR
16h 00m1 stop
Virgin Atlantic Logo
10:55 am - 10:40 pmLHR-ONT
19h 45m1 stop
$497Virgin Atlantic
Find Deal
Tue, Aug 19 - Thu, Sep 4
Virgin Atlantic Logo
1:15 pm - 9:50 amONT-LHR
12h 35m1 stop
Virgin Atlantic Logo
10:55 am - 10:40 pmLHR-ONT
19h 45m1 stop
$499Virgin Atlantic
Find Deal
Tue, Aug 19 - Thu, Sep 4
Delta Logo
11:29 am - 3:45 pmONT-LHR
21h 16m1 stop
Delta Logo
6:20 am - 10:42 pmLHR-ONT
24h 22m2 stops
$524Delta
Find Deal
Mon, Oct 27 - Wed, Nov 5
Delta Logo
6:00 am - 10:00 amONT-LHR
21h 00m1 stop
Delta Logo
6:20 am - 5:17 pmLHR-ONT
18h 57m2 stops
$525Delta
Find Deal
Tue, Oct 28 - Tue, Nov 4
British Airways Logo
4:49 pm - 12:50 pmONT-LHR
12h 01m1 stop
British Airways Logo
2:55 pm - 10:00 pmLHR-ONT
15h 05m1 stop
$650British Airways
Find Deal
Wed, Oct 15 - Tue, Nov 4
United Airlines Logo
1:34 pm - 12:20 pmONT-LHR
14h 46m1 stop
United Airlines Logo
2:50 pm - 8:43 pmLHR-ONT
13h 53m1 stop
$652United Airlines
Find Deal
Sun, Aug 3 - Tue, Aug 19
Iberia Logo
2:57 pm - 2:25 pmONT-LHR
15h 28m1 stop
Iberia Logo
10:30 am - 6:54 pmLHR-ONT
16h 24m1 stop
$657Iberia
Find Deal
Tue, Aug 19 - Thu, Sep 4
Iberia Logo
2:57 pm - 2:25 pmONT-LHR
15h 28m1 stop
Iberia Logo
10:30 am - 6:54 pmLHR-ONT
16h 24m1 stop
$658Iberia
Find Deal
Tue, Aug 19 - Fri, Sep 5
British Airways Logo
4:49 pm - 12:50 pmONT-LHR
12h 01m1 stop
British Airways Logo
2:55 pm - 10:42 pmLHR-ONT
14h 47m1 stop
$660British Airways
Find Deal
Sun, Oct 19 - Tue, Oct 28
United Airlines Logo
1:19 pm - 10:25 amONT-LHR
13h 06m1 stop
United Airlines Logo
10:35 am - 5:37 pmLHR-ONT
15h 02m1 stop
$662United Airlines
Find Deal
Tue, Aug 12 - Tue, Aug 19

United Airlines flights from Ontario to London

Our best United Airlines deals on Ontario to London flight tickets
United Airlines
Aug 3
ONT1:34 pmOntario
14h 46m
1 stop
LHR12:20 pmLondon Heathrow
Aug 19
LHR2:50 pmLondon Heathrow
13h 53m
1 stop
ONT8:43 pmOntario
United Airlines
Aug 12
ONT1:19 pmOntario
13h 06m
1 stop
LHR10:25 amLondon Heathrow
Aug 19
LHR10:35 amLondon Heathrow
15h 02m
1 stop
ONT5:37 pmOntario
United Airlines
Oct 29
ONT1:33 pmOntario
14h 42m
2 stops
LHR11:15 amLondon Heathrow
Nov 7
LHR1:45 pmLondon Heathrow
17h 00m
1 stop
ONT10:45 pmOntario

Virgin Atlantic flights from Ontario to London

Our best Virgin Atlantic deals on Ontario to London flight tickets
Virgin Atlantic
Aug 19
ONT9:50 amOntario
16h 00m
1 stop
LHR9:50 amLondon Heathrow
Sep 4
LHR10:55 amLondon Heathrow
19h 45m
1 stop
ONT10:40 pmOntario
Virgin Atlantic
Aug 19
ONT1:15 pmOntario
12h 35m
1 stop
LHR9:50 amLondon Heathrow
Sep 4
LHR10:55 amLondon Heathrow
19h 45m
1 stop
ONT10:40 pmOntario
Virgin Atlantic
Aug 27
ONT11:40 amOntario
15h 40m
1 stop
LHR11:20 amLondon Heathrow
Sep 3
LHR8:40 amLondon Heathrow
22h 02m
2 stops
ONT10:42 pmOntario

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?

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 $654, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from Ontario averaging around $676.

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

The cheapest day to depart from Ontario to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $769. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $888. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

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

Flying to London from Ontario in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $787 when looking at flights departing in the afternoon. Flights to London are more costly in the evening, with an average ticket price of $847. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $846 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Ontario for as low as $674 on momondo.

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 round-trip 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

$315

Fastest flight time

12h 01m

Direct flights

None

Airports in London

3 airports
The best one-way flight to London from Ontario in the past 72 hours is $315. The best round-trip flight deal from Ontario to London found on momondo in the last 72 hours is $497.
The fastest flight from Ontario to London takes 12h 01m
There are no direct flights from Ontario to London. Popular non-direct routes for this connection are Ontario Airport - London Gatwick Airport, Ontario Airport - London Heathrow Airport and Ontario Airport - London City Airport.
There are 3 airports near London: London City (LCY), London Heathrow (LHR), London Gatwick (LGW)

  • How far is Ontario to London by plane?

    The straight-line distance from Ontario to London is 5417.5 mi. A reasonable flight in good conditions will take 12h 01m.

  • When did momondo last update prices for flights from Ontario Airport to London?

    Prices for flights from Ontario Airport to London are updated daily.

  • How many operators does momondo search for flights from Ontario Airport to London?

  • How old do you have to be to fly from Ontario Airport to London?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to London.

  • What documentation or ID do you need to fly to London?

    The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Ontario to London?


Best airlines flying from Ontario to London

Compare and see reviews for airlines that fly from Ontario to London with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $572Free CancellationRating
8.0
7,953 reviews
Search Delta flights
KLMPriceFrom $580Free CancellationRating
7.8
1,372 reviews
Search KLM flights
IberiaPriceFrom $582Free CancellationRating
7.0
2,834 reviews
Search Iberia flights
Virgin AtlanticPriceFrom $629Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights
United AirlinesPriceFrom $633Free CancellationRating
7.4
8,856 reviews
Search United Airlines flights
British AirwaysPriceFrom $648Free CancellationRating
6.6
7,134 reviews
Search British Airways flights
American AirlinesPriceFrom $648Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Slough
Dover
Luton
Croydon
Dartford
Guildford
Stansted
Milton Keynes
Hayes
Ilford
Colchester
Chelmsford
Canterbury
Watford
Richmond
Wembley
Dagenham
St. Albans

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to London?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to London. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ontario to London with flexible booking policies on momondo?

All flight searches from Ontario to London on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to London.

I’m not ready to book a flight from Ontario to London right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Ontario to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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1 adult
Sat 7/19
Sat 7/26

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