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Cheap flights from Ontario to London from $291

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 8/13. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Ontario to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
1:17 pm - 3:45 pm
ONT
-
LGW
19h 28m
2 stops
Delta Logo
10:00 am - 10:43 pm
LGW
-
ONT
20h 43m
2 stops
$877Delta
Tue, Oct 27 - Wed, Nov 4
Delta Logo
7:05 am - 9:40 am
ONT
-
LGW
18h 35m
2 stops
Delta Logo
10:35 am - 10:43 pm
LGW
-
ONT
20h 08m
2 stops
$917Delta
Mon, Oct 12 - Tue, Oct 20
Delta Logo
6:00 pm - 9:25 am
ONT
-
LGW
31h 25m
2 stops
Delta Logo
10:35 am - 11:16 am
LGW
-
ONT
32h 41m
2 stops
$927Delta
Sat, Oct 3 - Tue, Oct 13
American Airlines Logo
6:00 am - 8:40 am
ONT
-
LGW
18h 40m
2 stops
American Airlines Logo
2:30 pm - 11:43 am
LGW
-
ONT
29h 13m
2 stops
$936American Airlines
Mon, Aug 17 - Wed, Sep 2
American Airlines Logo
7:05 am - 8:40 am
ONT
-
LGW
17h 35m
2 stops
American Airlines Logo
10:30 am - 10:59 pm
LGW
-
ONT
20h 29m
2 stops
$937American Airlines
Tue, Sep 1 - Tue, Sep 8
Delta Logo
6:20 am - 9:25 am
ONT
-
LGW
19h 05m
2 stops
Delta Logo
10:25 am - 10:40 pm
LGW
-
ONT
20h 15m
2 stops
$951Delta
Tue, Sep 1 - Thu, Sep 10
Delta Logo
11:56 am - 4:00 pm
ONT
-
LGW
20h 04m
2 stops
Delta Logo
10:35 am - 10:40 pm
LGW
-
ONT
20h 05m
2 stops
$980Delta
Mon, Aug 31 - Tue, Sep 15
Delta Logo
11:56 am - 4:00 pm
ONT
-
LGW
20h 04m
2 stops
Delta Logo
10:25 am - 9:52 pm
LGW
-
ONT
19h 27m
2 stops
$1,031Delta
Mon, Aug 31 - Mon, Sep 7
Multiple Airlines Logo
11:20 am - 10:55 am
ONT
-
LGW
15h 35m
2 stops
Multiple Airlines Logo
11:55 am - 10:40 pm
LGW
-
ONT
18h 45m
2 stops
$1,040Multiple Airlines
Sat, Dec 5 - Fri, Dec 11
Multiple Airlines Logo
10:25 am - 10:55 am
ONT
-
LGW
17h 30m
2 stops
Multiple Airlines Logo
11:55 am - 10:40 pm
LGW
-
ONT
18h 45m
2 stops
$1,041Multiple Airlines
Wed, Oct 28 - Mon, Nov 2

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Delta flights from Ontario to London Gatwick Airport

Our best Delta deals on Ontario to London Gatwick Airport flight tickets
Delta
Oct 27
ONT1:17 pmOntario
19h 28m
2 stops
LGW3:45 pmLondon Gatwick
Nov 4
LGW10:00 amLondon Gatwick
20h 43m
2 stops
ONT10:43 pmOntario
$877
Delta
Oct 12
ONT7:05 amOntario
18h 35m
2 stops
LGW9:40 amLondon Gatwick
Oct 20
LGW10:35 amLondon Gatwick
20h 08m
2 stops
ONT10:43 pmOntario
$917
Delta
Oct 3
ONT6:00 pmOntario
31h 25m
2 stops
LGW9:25 amLondon Gatwick
Oct 13
LGW10:35 amLondon Gatwick
32h 41m
2 stops
ONT11:16 amOntario
$927

Turkish Airlines flights from Ontario to London Gatwick Airport

Our best Turkish Airlines deals on Ontario to London Gatwick Airport flight tickets
Turkish Airlines
Sep 8
ONT11:50 pmOntario
50h 05m
2 stops
LGW9:55 amLondon Gatwick
Sep 16
LGW5:35 pmLondon Gatwick
34h 38m
2 stops
ONT8:13 pmOntario
$1,085
Turkish Airlines
Sep 14
ONT9:10 pmOntario
35h 25m
2 stops
LGW4:35 pmLondon Gatwick
Sep 20
LGW5:35 pmLondon Gatwick
58h 38m
2 stops
ONT8:13 pmOntario
$1,093
Turkish Airlines
Sep 15
ONT9:10 pmOntario
28h 45m
2 stops
LGW9:55 amLondon Gatwick
Sep 20
LGW5:35 pmLondon Gatwick
58h 38m
2 stops
ONT8:13 pmOntario
$1,170

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to London Gatwick Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated July 22, 2026.
Use the filters below to find and compare flights from Ontario to London Gatwick Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Tue 10/27

1:17 pm-3:45 pm

2 stops19h 28m

London Gatwick

Wed 11/4

10:00 am-10:43 pm

2 stops20h 43m

$877

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Mon 10/12

7:05 am-9:40 am

2 stops18h 35m

London Gatwick

Tue 10/20

10:35 am-10:43 pm

2 stops20h 08m

$917

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Sat 10/3

6:00 pm-9:25 am

2 stops31h 25m

London Gatwick

Tue 10/13

10:35 am-11:16 am

2 stops32h 41m

$927

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Mon 8/17

6:00 am-8:40 am

2 stops18h 40m

London Gatwick

Wed 9/2

2:30 pm-11:43 am

2 stops29h 13m

$936

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Tue 9/1

7:05 am-8:40 am

2 stops17h 35m

London Gatwick

Tue 9/8

10:30 am-10:59 pm

2 stops20h 29m

$937

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Tue 9/1

6:20 am-9:25 am

2 stops19h 05m

London Gatwick

Thu 9/10

10:25 am-10:40 pm

2 stops20h 15m

$951

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Mon 8/31

11:56 am-4:00 pm

2 stops20h 04m

London Gatwick

Tue 9/15

10:35 am-10:40 pm

2 stops20h 05m

$980

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Mon 8/31

11:56 am-4:00 pm

2 stops20h 04m

London Gatwick

Mon 9/7

10:25 am-9:52 pm

2 stops19h 27m

$1,031
Quickest round-trip

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Sat 12/5

11:20 am-10:55 am

2 stops15h 35m

London Gatwick

Fri 12/11

11:55 am-10:40 pm

2 stops18h 45m

$1,040

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 10/28

10:25 am-10:55 am

2 stops17h 30m

London Gatwick

Mon 11/2

11:55 am-10:40 pm

2 stops18h 45m

$1,041

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 Gatwick 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 day to depart on your flight to London Gatwick Airport?

The cheapest day to depart from Ontario to London Gatwick Airport is on a Tuesday when prices can be found for as low as $628. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to London Gatwick Airport on Thursday is $751.

When to book flights from Ontario to London Gatwick Airport

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

Cheap Ontario to London Gatwick Airport (ONT to LGW) flight deals and tips

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

Fastest flight time

15h 35m

Direct flights

None
The fastest flight from Ontario to London Gatwick Airport takes 15h 35m
There are no direct flights from Ontario to London Gatwick Airport. There are no popular flight routes from Ontario to London Gatwick Airport.
Search flight deals

Frequently asked questions about flying from Ontario to London Gatwick Airport

  • How far is Ontario to London Gatwick by plane?

    The straight-line distance from Ontario to London Gatwick is 5431.4 mi. Flights usually cover this in 15h 35m, depending on flying conditions and air traffic around both airports.

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

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

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

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

    The necessary travel and health documents for your London Gatwick 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.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Milton Keynes
Luton
Hayes
Dover
Crawley
Wembley
Croydon
Stansted
Kingston upon Thames
Watford
Slough
Harrow
Brentwood
Cobham
Romford
Uxbridge
Guildford
Worthing

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Ontario.

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

momondo does allow users to show only those flights to London from Ontario which offer a flexible booking policy as well as other useful filters and features.

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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