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Cheap flights from Ontario to London from $316

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 2/28. 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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Find the cheapest flights from Ontario to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
7:30 am - 9:25 am
ONT
-
LGW
17h 55m
2 stops
Delta Logo
10:25 am - 8:58 pm
LGW
-
ONT
18h 33m
2 stops
$819Delta
Thu, Apr 23 - Mon, May 4
Delta Logo
7:30 am - 9:25 am
ONT
-
LGW
17h 55m
2 stops
Delta Logo
10:25 am - 8:58 pm
LGW
-
ONT
18h 33m
2 stops
$894Delta
Thu, Apr 23 - Mon, May 4
Multiple Airlines Logo
12:02 pm - 10:35 pm
ONT
-
LGW
26h 33m
2 stops
Multiple Airlines Logo
5:05 pm - 11:32 pm
LGW
-
ONT
37h 27m
2 stops
$1,043Multiple Airlines
Thu, Mar 5 - Thu, Mar 12
Multiple Airlines Logo
12:02 pm - 10:35 pm
ONT
-
LGW
26h 33m
2 stops
Multiple Airlines Logo
5:05 pm - 11:32 pm
LGW
-
ONT
37h 27m
2 stops
$1,044Multiple Airlines
Thu, Mar 5 - Thu, Mar 12
Multiple Airlines Logo
10:33 am - 10:35 pm
ONT
-
LGW
29h 02m
2 stops
Multiple Airlines Logo
7:00 am - 9:39 am
LGW
-
ONT
34h 39m
2 stops
$1,060Multiple Airlines
Tue, Mar 24 - Thu, Apr 16
Multiple Airlines Logo
10:33 am - 10:35 pm
ONT
-
LGW
29h 02m
2 stops
Multiple Airlines Logo
7:00 am - 9:39 am
LGW
-
ONT
34h 39m
2 stops
$1,061Multiple Airlines
Tue, Mar 24 - Tue, Apr 14
Multiple Airlines Logo
6:14 am - 10:35 pm
ONT
-
LGW
32h 21m
2 stops
Multiple Airlines Logo
6:20 am - 9:39 am
LGW
-
ONT
34h 19m
2 stops
$1,062Multiple Airlines
Sun, Mar 1 - Sun, Mar 22
Multiple Airlines Logo
10:39 am - 10:25 pm
ONT
-
LGW
27h 46m
2 stops
Multiple Airlines Logo
7:00 am - 11:59 pm
LGW
-
ONT
24h 59m
2 stops
$1,072Multiple Airlines
Mon, Apr 27 - Thu, May 7
Multiple Airlines Logo
10:39 am - 10:25 pm
ONT
-
LGW
27h 46m
2 stops
Multiple Airlines Logo
7:00 am - 9:45 am
LGW
-
ONT
34h 45m
2 stops
$1,080Multiple Airlines
Fri, May 1 - Mon, May 11
Multiple Airlines Logo
10:39 am - 10:25 pm
ONT
-
LGW
27h 46m
2 stops
Multiple Airlines Logo
5:35 pm - 10:32 pm
LGW
-
ONT
36h 57m
2 stops
$1,081Multiple Airlines
Fri, May 1 - Mon, May 11

Iberia flights from Ontario to London Gatwick Airport

Our best Iberia deals on Ontario to London Gatwick Airport flight tickets
Iberia
May 7
ONT2:08 pmOntario
21h 52m
2 stops
LGW8:00 pmLondon Gatwick
May 28
LGW11:30 amLondon Gatwick
20h 29m
2 stops
ONT11:59 pmOntario
$1,085
Iberia
May 7
ONT2:08 pmOntario
21h 52m
2 stops
LGW8:00 pmLondon Gatwick
May 21
LGW11:30 amLondon Gatwick
20h 29m
2 stops
ONT11:59 pmOntario
$1,181
Iberia
Jun 7
ONT2:22 pmOntario
21h 38m
2 stops
LGW8:00 pmLondon Gatwick
Jun 19
LGW11:30 amLondon Gatwick
20h 29m
2 stops
ONT11:59 pmOntario
$3,995

Turkish Airlines flights from Ontario to London Gatwick Airport

Our best Turkish Airlines deals on Ontario to London Gatwick Airport flight tickets
Turkish Airlines
Jul 4
ONT11:25 pmOntario
33h 15m
2 stops
LGW4:40 pmLondon Gatwick
Jul 26
LGW5:35 pmLondon Gatwick
36h 34m
2 stops
ONT10:09 pmOntario
$1,739
Turkish Airlines
Jul 4
ONT11:25 pmOntario
26h 30m
2 stops
LGW9:55 amLondon Gatwick
Jul 22
LGW7:00 amLondon Gatwick
47h 09m
2 stops
ONT10:09 pmOntario
$1,799
Turkish Airlines
Jul 1
ONT11:25 pmOntario
33h 15m
2 stops
LGW4:40 pmLondon Gatwick
Jul 20
LGW2:05 pmLondon Gatwick
64h 04m
2 stops
ONT10:09 pmOntario
$1,822

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 January 20, 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

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Thu 4/23

7:30 am-9:25 am

2 stops17h 55m

London Gatwick

Mon 5/4

10:25 am-8:58 pm

2 stops18h 33m

$819

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Thu 4/23

7:30 am-9:25 am

2 stops17h 55m

London Gatwick

Mon 5/4

10:25 am-8:58 pm

2 stops18h 33m

$894

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Thu 3/5

12:02 pm-10:35 pm

2 stops26h 33m

London Gatwick

Thu 3/12

5:05 pm-11:32 pm

2 stops37h 27m

$1,043

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Thu 3/5

12:02 pm-10:35 pm

2 stops26h 33m

London Gatwick

Thu 3/12

5:05 pm-11:32 pm

2 stops37h 27m

$1,044

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Tue 3/24

10:33 am-10:35 pm

2 stops29h 02m

London Gatwick

Thu 4/16

7:00 am-9:39 am

2 stops34h 39m

$1,060

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Tue 3/24

10:33 am-10:35 pm

2 stops29h 02m

London Gatwick

Tue 4/14

7:00 am-9:39 am

2 stops34h 39m

$1,061

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Sun 3/1

6:14 am-10:35 pm

2 stops32h 21m

London Gatwick

Sun 3/22

6:20 am-9:39 am

2 stops34h 19m

$1,062

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Mon 4/27

10:39 am-10:25 pm

2 stops27h 46m

London Gatwick

Thu 5/7

7:00 am-11:59 pm

2 stops24h 59m

$1,072

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Fri 5/1

10:39 am-10:25 pm

2 stops27h 46m

London Gatwick

Mon 5/11

7:00 am-9:45 am

2 stops34h 45m

$1,080

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Fri 5/1

10:39 am-10:25 pm

2 stops27h 46m

London Gatwick

Mon 5/11

5:35 pm-10:32 pm

2 stops36h 57m

$1,081

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 $563. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Gatwick Airport on Saturday is $706.

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

17h 55m

Direct flights

None
The fastest flight from Ontario to London Gatwick Airport takes 17h 55m
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

  • 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 17h 55m, 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
Gatwick
Hounslow
Luton
Milton Keynes
Dover
Slough
Guildford
Wembley
Crawley
Dartford
Hayes
Brentwood
Watford
Cobham
Folkestone
Romford
Stansted
Harrow
Croydon
Richmond

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.

An easier way to manage your London Gatwick Airport trip

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