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Cheap flights from Ontario to London Heathrow Airport from $338

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 Heathrow Airport departing on 5/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to London

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from Ontario to London.
Iberia Logo
10:54 am - 9:00 amONT-LHR
14h 06m1 stop
Iberia Logo
6:10 am - 9:58 pmLHR-ONT
23h 48m2 stops
$597Iberia
Find Deal
Wed, Apr 30 - Tue, May 6
Iberia Logo
7:00 am - 10:50 amONT-LHR
19h 50m1 stop
Iberia Logo
10:50 am - 11:43 pmLHR-ONT
20h 53m2 stops
$600Iberia
Find Deal
Sun, May 4 - Tue, May 13
American Airlines Logo
4:35 pm - 12:50 pmONT-LHR
12h 15m1 stop
American Airlines Logo
3:40 pm - 9:57 pmLHR-ONT
14h 17m1 stop
$628American Airlines
Find Deal
Fri, May 2 - Fri, May 16
Delta Logo
12:07 pm - 1:10 pmONT-LHR
17h 03m2 stops
Delta Logo
11:30 am - 10:43 pmLHR-ONT
19h 13m2 stops
$632Delta
Find Deal
Thu, Apr 17 - Tue, Apr 29
Delta Logo
11:45 am - 2:15 pmONT-LHR
18h 30m1 stop
Delta Logo
1:25 pm - 10:43 pmLHR-ONT
17h 18m1 stop
$636Delta
Find Deal
Fri, Apr 18 - Tue, Apr 29
British Airways Logo
4:35 pm - 12:50 pmONT-LHR
12h 15m1 stop
British Airways Logo
8:00 pm - 6:36 pmLHR-ONT
30h 36m2 stops
$655British Airways
Find Deal
Fri, May 2 - Sun, May 18
British Airways Logo
10:00 am - 2:50 pmONT-LHR
20h 50m1 stop
British Airways Logo
7:30 pm - 6:36 pmLHR-ONT
31h 06m2 stops
$658British Airways
Find Deal
Sat, May 10 - Sat, May 17
American Airlines Logo
4:45 pm - 12:50 pmONT-LHR
12h 05m1 stop
American Airlines Logo
3:40 pm - 9:35 pmLHR-ONT
13h 55m1 stop
$674American Airlines
Find Deal
Tue, Aug 5 - Wed, Aug 13
United Airlines Logo
6:00 am - 6:30 amONT-LHR
16h 30m2 stops
United Airlines Logo
9:30 am - 12:38 pmLHR-ONT
35h 08m2 stops
$685United Airlines
Find Deal
Tue, Apr 22 - Mon, May 12
United Airlines Logo
4:15 pm - 12:20 pmONT-LHR
12h 05m1 stop
United Airlines Logo
9:30 am - 8:53 pmLHR-ONT
19h 23m2 stops
$694United Airlines
Find Deal
Thu, May 1 - Wed, May 7

United Airlines flights from Ontario to London Heathrow Airport

Our best United Airlines deals on Ontario to London Heathrow Airport flight tickets
United Airlines
Apr 22
ONT6:00 amOntario
16h 30m
2 stops
LHR6:30 amLondon Heathrow
May 12
LHR9:30 amLondon Heathrow
35h 08m
2 stops
ONT12:38 pmOntario
United Airlines
May 1
ONT4:15 pmOntario
12h 05m
1 stop
LHR12:20 pmLondon Heathrow
May 7
LHR9:30 amLondon Heathrow
19h 23m
2 stops
ONT8:53 pmOntario
United Airlines
Apr 16
ONT1:35 pmOntario
12h 05m
1 stop
LHR9:40 amLondon Heathrow
Apr 23
LHR1:30 pmLondon Heathrow
17h 25m
2 stops
ONT10:55 pmOntario

Air Canada flights from Ontario to London Heathrow Airport

Our best Air Canada deals on Ontario to London Heathrow Airport flight tickets
Air Canada
Jul 11
ONT6:38 pmOntario
55h 22m
2 stops
LHR10:00 amLondon Heathrow
Oct 11
LHR3:50 pmLondon Heathrow
60h 27m
2 stops
ONT8:17 pmOntario
Air Canada
Apr 17
ONT4:17 pmOntario
33h 43m
2 stops
LHR10:00 amLondon Heathrow
Apr 29
LHR2:05 pmLondon Heathrow
30h 33m
2 stops
ONT12:38 pmOntario

See travel insights to London from

How to get the cheapest flight ticket from Ontario to London Heathrow Airport

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 Heathrow Airport?

The month of April is, on average, the cheapest month to fly to London Heathrow Airport from Ontario, with most prices found around $653. If you’re not able to fly to London Heathrow Airport in April, then March is your next best option. Flight prices from Ontario to London Heathrow Airport during March average around $663.

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

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $820. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $955.

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

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from Ontario to London Heathrow Airport in the morning for as low as $755. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $900.

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

You are more likely to see cheaper flights to London Heathrow Airport from Ontario when booking 16 weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $802 when searching 16 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Ontario for as low as $731 on momondo.

When to book flights from Ontario to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to London Heathrow Airport (ONT to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to London Heathrow Airport

Best Price Found

$338

Fastest flight time

12h 00m

Direct flights

None
The best one-way flight to London Heathrow Airport from Ontario in the past 72 hours is $338. The best round-trip flight deal from Ontario to London Heathrow Airport found on momondo in the last 72 hours is $597.
The fastest flight from Ontario to London Heathrow Airport takes 12h 00m
There are no direct flights from Ontario to London Heathrow Airport. Popular non-direct route for this connection is Ontario Airport - London Heathrow Airport.

  • How far is Ontario to London Heathrow by plane?

    The straight-line distance from Ontario to London Heathrow is 5408.1 mi. Typically, this will take 12h 05m by plane in normal conditions.

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

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

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

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

    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 Heathrow Airport.

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

    The necessary travel and health documents for your London Heathrow Airport 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 Heathrow Airport?


Best airlines flying from Ontario to London Heathrow Airport

Compare and see reviews for airlines that fly from Ontario to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
Virgin AtlanticPriceFrom $454Free CancellationRating
7.4
637 reviews
Search Virgin Atlantic flights
IberiaPriceFrom $582Free CancellationRating
7.0
2,658 reviews
Search Iberia flights
DeltaPriceFrom $598Free CancellationRating
8.0
7,897 reviews
Search Delta flights
United AirlinesPriceFrom $629Free CancellationRating
7.4
8,619 reviews
Search United Airlines flights
American AirlinesPriceFrom $629Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
British AirwaysPriceFrom $648Free CancellationRating
6.6
6,718 reviews
Search British Airways flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Croydon
Luton
Guildford
Hayes
Slough
Dartford
Stansted
Ilford
Salisbury
Swindon
Dover
Canterbury
Colchester
Milton Keynes
Horley
Wembley
Chelmsford
Eastbourne

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?

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 offers price alerts on flights to London from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.


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