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Cheap flights from Ontario to London from $317

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:25 am - 10:50 amONT  Ontario-LHR London Heathrow
20h 25m2 stops Denver Intl Reykjavik Keflavik Intl
Multiple Airlines Logo
8:35 pm - 11:51 pmLHR  London Heathrow-ONT Ontario
35h 16m2 stops Reykjavik Keflavik Intl Denver Intl
$695Multiple Airlines
Thu, Nov 12 - Mon, Nov 16
Multiple Airlines Logo
6:25 am - 7:30 pmONT  Ontario-LHR London Heathrow
29h 05m2 stops Denver Intl Reykjavik Keflavik Intl
Multiple Airlines Logo
12:15 pm - 11:51 pmLHR  London Heathrow-ONT Ontario
19h 36m2 stops Reykjavik Keflavik Intl Denver Intl
$699Multiple Airlines
Thu, Nov 5 - Thu, Nov 12
Virgin Atlantic Logo
6:00 pm - 3:35 pmONT  Ontario-LHR London Heathrow
13h 35m1 stop Seattle/Tacoma Intl
Virgin Atlantic Logo
12:20 pm - 10:43 pmLHR  London Heathrow-ONT Ontario
17h 23m1 stop Seattle/Tacoma Intl
$734Virgin Atlantic
Mon, Oct 19 - Tue, Oct 27
Delta Logo
12:16 pm - 11:40 amONT  Ontario-LHR London Heathrow
15h 24m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:20 am - 4:24 pmLHR  London Heathrow-ONT Ontario
18h 04m2 stops Paris Charles de Gaulle Salt Lake City
$737Delta
Wed, Nov 4 - Tue, Nov 10
Delta Logo
7:07 am - 6:25 amONT  Ontario-LHR London Heathrow
15h 18m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:30 am - 6:34 pmLHR  London Heathrow-ONT Ontario
20h 04m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson
$737Delta
Wed, Nov 4 - Thu, Nov 12
Alaska Airlines Logo
2:13 pm - 12:20 pmONT  Ontario-LHR London Heathrow
15h 07m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
2:45 pm - 11:31 pmLHR  London Heathrow-ONT Ontario
16h 46m1 stop Seattle/Tacoma Intl
$743Alaska Airlines
Tue, Oct 27 - Tue, Nov 24
Alaska Airlines Logo
11:13 am - 12:20 pmONT  Ontario-LHR London Heathrow
18h 07m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
2:45 pm - 11:31 pmLHR  London Heathrow-ONT Ontario
16h 46m1 stop Seattle/Tacoma Intl
$743Alaska Airlines
Tue, Oct 27 - Wed, Nov 25
Virgin Atlantic Logo
1:35 pm - 3:35 pmONT  Ontario-LHR London Heathrow
18h 00m2 stops Salt Lake City Seattle/Tacoma Intl
Virgin Atlantic Logo
12:20 pm - 11:55 pmLHR  London Heathrow-ONT Ontario
18h 35m2 stops Seattle/Tacoma Intl Salt Lake City
$748Virgin Atlantic
Wed, Oct 21 - Wed, Oct 28
British Airways Logo
10:31 am - 8:15 amONT  Ontario-LHR London Heathrow
13h 44m1 stop Dallas/Fort Worth
British Airways Logo
2:45 pm - 11:45 pmLHR  London Heathrow-ONT Ontario
16h 00m1 stop Dallas/Fort Worth
$842British Airways
Tue, Mar 9 - Wed, Mar 24
British Airways Logo
5:02 pm - 1:35 pmONT  Ontario-LHR London Heathrow
13h 33m1 stop Phoenix Sky Harbor Intl
British Airways Logo
2:25 pm - 9:28 pmLHR  London Heathrow-ONT Ontario
15h 03m1 stop Dallas/Fort Worth
$842British Airways
Wed, Mar 17 - Wed, Mar 31

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Alaska Airlines flights from Ontario to London Heathrow Airport

Our best Alaska Airlines deals on Ontario to London Heathrow Airport flight tickets
Alaska Airlines
Oct 27
ONT11:13 amOntario
18h 07m
1 stop
LHR12:20 pmLondon Heathrow
Nov 25
LHR2:45 pmLondon Heathrow
16h 46m
1 stop
ONT11:31 pmOntario
$743
Alaska Airlines
Nov 4
ONT12:02 pmOntario
16h 18m
1 stop
LHR12:20 pmLondon Heathrow
Nov 12
LHR2:45 pmLondon Heathrow
16h 21m
1 stop
ONT11:06 pmOntario
$744
Alaska Airlines
Oct 13
ONT2:13 pmOntario
16h 52m
1 stop
LHR3:05 pmLondon Heathrow
Oct 27
LHR2:45 pmLondon Heathrow
26h 32m
1 stop
ONT10:17 amOntario
$749

Delta flights from Ontario to London Heathrow Airport

Our best Delta deals on Ontario to London Heathrow Airport flight tickets
Delta
Nov 4
ONT12:16 pmOntario
15h 24m
1 stop
LHR11:40 amLondon Heathrow
Nov 10
LHR6:20 amLondon Heathrow
18h 04m
2 stops
ONT4:24 pmOntario
$737
Delta
Oct 26
ONT6:00 amOntario
18h 45m
2 stops
LHR7:45 amLondon Heathrow
Nov 3
LHR6:20 amLondon Heathrow
18h 03m
2 stops
ONT4:23 pmOntario
$741
Delta
Nov 5
ONT7:07 amOntario
16h 43m
1 stop
LHR7:50 amLondon Heathrow
Nov 12
LHR6:30 amLondon Heathrow
20h 04m
2 stops
ONT6:34 pmOntario
$787

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Thu 11/12

6:25 am-10:50 am

2 stops20h 25m

London Heathrow

Mon 11/16

8:35 pm-11:51 pm

2 stops35h 16m

$695

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Thu 11/5

6:25 am-7:30 pm

2 stops29h 05m

London Heathrow

Thu 11/12

12:15 pm-11:51 pm

2 stops19h 36m

$699

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 10/19

6:00 pm-3:35 pm

1 stop13h 35m

London Heathrow

Tue 10/27

12:20 pm-10:43 pm

1 stop17h 23m

$734

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 11/4

12:16 pm-11:40 am

1 stop15h 24m

London Heathrow

Tue 11/10

6:20 am-4:24 pm

2 stops18h 04m

$737

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 11/4

7:07 am-6:25 am

1 stop15h 18m

London Heathrow

Thu 11/12

6:30 am-6:34 pm

2 stops20h 04m

$737

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 10/27

2:13 pm-12:20 pm

1 stop15h 07m

London Heathrow

Tue 11/24

2:45 pm-11:31 pm

1 stop16h 46m

$743

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 10/27

11:13 am-12:20 pm

1 stop18h 07m

London Heathrow

Wed 11/25

2:45 pm-11:31 pm

1 stop16h 46m

$743

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 10/21

1:35 pm-3:35 pm

2 stops18h 00m

London Heathrow

Wed 10/28

12:20 pm-11:55 pm

2 stops18h 35m

$748

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 3/9

10:31 am-8:15 am

1 stop13h 44m

London Heathrow

Wed 3/24

2:45 pm-11:45 pm

1 stop16h 00m

$842
Quickest round-trip

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 3/17

5:02 pm-1:35 pm

1 stop13h 33m

London Heathrow

Wed 3/31

2:25 pm-9:28 pm

1 stop15h 03m

$842

Flights are sorted by cheapest round-trip 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 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 typical price of a round-trip flight between Ontario and London Heathrow Airport?

Prices are currently low for flights on this route.

Typical prices usually range from $852 to $949.
The lowest price recently found on this route was $695.

What is the cheapest month to fly to London Heathrow Airport?

The month of November is, on average, the cheapest month to fly to London Heathrow Airport from Ontario, with most prices found around $665. If you’re not able to fly to London Heathrow Airport in November, then December is your next best option. Flight prices from Ontario to London Heathrow Airport during December average around $743.

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

Our data shows that Tuesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $939. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $1,057.

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 at noon. momondo users have found flights departing from Ontario to London Heathrow Airport at noon for as low as $820. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $1,025.

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

$317

Fastest flight time

12h 36m

Direct flights

None
The best one-way flight to London Heathrow Airport from Ontario in the past 72 hours is $317. The best round-trip flight deal from Ontario to London Heathrow Airport found on momondo in the last 72 hours is $695.
The fastest flight from Ontario to London Heathrow Airport takes 12h 36m
There are no direct flights from Ontario to London Heathrow Airport. There are no popular flight routes from Ontario to London Heathrow Airport.
Search flight deals

Frequently asked questions about flying from Ontario to 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 36m 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 $488Free CancellationRating
7.4
694 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom $615Free CancellationRating
6.7
8,238 reviews
Search British Airways flights
United AirlinesPriceFrom $703Free CancellationRating
7.4
10,247 reviews
Search United Airlines flights
DeltaPriceFrom $710Free CancellationRating
7.8
8,606 reviews
Search Delta flights
Alaska AirlinesPriceFrom $806Free CancellationRating
7.9
12,985 reviews
Search Alaska Airlines flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Croydon
Hayes
Luton
Stratford-upon-Avon
Dover
Wembley
Milton Keynes
Kingston upon Thames
Richmond
Stansted
Watford
Harrow
Cobham
Worthing
Eastbourne
Slough
Hook
Ilford

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.

An easier way to manage your London Heathrow Airport trip

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