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Cheap flights from Ontario to London from $290

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 1/17. 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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Find the cheapest flights from Ontario to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Iberia Logo
10:58 am - 7:00 pmONT-LGW
24h 02m2 stops
Iberia Logo
7:40 pm - 10:08 amLGW-ONT
22h 28m2 stops
$650Iberia
Find Deal
Tue, Feb 3 - Mon, Feb 9
Iberia Logo
6:00 am - 10:50 amONT-LGW
20h 50m2 stops
Iberia Logo
7:40 pm - 2:18 pmLGW-ONT
26h 38m2 stops
$787Iberia
Find Deal
Thu, Feb 5 - Mon, Feb 9
American Airlines Logo
6:22 am - 9:00 amONT-LGW
18h 38m2 stops
American Airlines Logo
11:20 am - 12:03 pmLGW-ONT
56h 43m2 stops
$807American Airlines
Find Deal
Wed, Jan 28 - Sun, Feb 1
Iberia Logo
6:00 am - 10:50 amONT-LGW
20h 50m2 stops
Iberia Logo
11:45 am - 1:57 pmLGW-ONT
34h 12m2 stops
$924Iberia
Find Deal
Thu, Feb 5 - Fri, Feb 20
Multiple Airlines Logo
7:00 am - 10:55 amONT-LGW
20h 55m2 stops
Multiple Airlines Logo
11:55 am - 10:44 pmLGW-ONT
17h 49m2 stops
$926Multiple Airlines
Find Deal
Tue, Mar 10 - Tue, Mar 17
Multiple Airlines Logo
6:00 am - 2:40 pmONT-LGW
24h 40m2 stops
Multiple Airlines Logo
1:00 pm - 10:38 pmLGW-ONT
17h 38m2 stops
$979Multiple Airlines
Find Deal
Wed, Apr 15 - Tue, May 5
Multiple Airlines Logo
6:14 am - 10:55 amONT-LGW
20h 41m2 stops
Multiple Airlines Logo
11:55 am - 11:32 pmLGW-ONT
18h 37m2 stops
$1,006Multiple Airlines
Find Deal
Wed, Mar 4 - Sun, Mar 8
Multiple Airlines Logo
6:14 am - 10:55 amONT-LGW
20h 41m2 stops
Multiple Airlines Logo
11:55 am - 11:32 pmLGW-ONT
18h 37m2 stops
$1,007Multiple Airlines
Find Deal
Wed, Mar 4 - Sun, Mar 8
Multiple Airlines Logo
11:30 am - 2:40 pmONT-LGW
19h 10m2 stops
Multiple Airlines Logo
1:00 pm - 10:38 pmLGW-ONT
17h 38m2 stops
$1,009Multiple Airlines
Find Deal
Wed, Apr 15 - Tue, May 5
Multiple Airlines Logo
6:30 am - 10:55 amONT-LGW
20h 25m2 stops
Multiple Airlines Logo
11:55 am - 11:56 pmLGW-ONT
20h 01m2 stops
$1,010Multiple Airlines
Find Deal
Wed, Jan 21 - Thu, Jan 29

Iberia flights from Ontario to London Gatwick Airport

Our best Iberia deals on Ontario to London Gatwick Airport flight tickets
Iberia
Feb 3
ONT10:58 amOntario
24h 02m
2 stops
LGW7:00 pmLondon Gatwick
Feb 9
LGW7:40 pmLondon Gatwick
22h 28m
2 stops
ONT10:08 amOntario
$650
Find similar
Iberia
Feb 5
ONT6:00 amOntario
20h 50m
2 stops
LGW10:50 amLondon Gatwick
Feb 9
LGW7:40 pmLondon Gatwick
26h 38m
2 stops
ONT2:18 pmOntario
$787
Find similar
Iberia
Feb 5
ONT6:00 amOntario
20h 50m
2 stops
LGW10:50 amLondon Gatwick
Feb 20
LGW11:45 amLondon Gatwick
34h 12m
2 stops
ONT1:57 pmOntario
$924
Find similar

British Airways flights from Ontario to London Gatwick Airport

Our best British Airways deals on Ontario to London Gatwick Airport flight tickets
British Airways
Dec 8
ONT10:47 amOntario
24h 13m
2 stops
LGW7:00 pmLondon Gatwick
Dec 13
LGW7:40 pmLondon Gatwick
30h 38m
2 stops
ONT6:18 pmOntario
$1,108
Find similar
British Airways
Dec 8
ONT6:00 amOntario
29h 00m
2 stops
LGW7:00 pmLondon Gatwick
Apr 15
LGW11:35 amLondon Gatwick
20h 05m
2 stops
ONT11:40 pmOntario
$1,152
Find similar
British Airways
Dec 7
ONT11:59 pmOntario
35h 01m
2 stops
LGW7:00 pmLondon Gatwick
Apr 15
LGW11:35 amLondon Gatwick
20h 05m
2 stops
ONT11:40 pmOntario
$1,161
Find similar

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 December 3, 2025.
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

Tue 2/3

10:58 am-7:00 pm

2 stops24h 02m

London Gatwick

Mon 2/9

7:40 pm-10:08 am

2 stops22h 28m

$650

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Thu 2/5

6:00 am-10:50 am

2 stops20h 50m

London Gatwick

Mon 2/9

7:40 pm-2:18 pm

2 stops26h 38m

$787

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 1/28

6:22 am-9:00 am

2 stops18h 38m

London Gatwick

Sun 2/1

11:20 am-12:03 pm

2 stops56h 43m

$807

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Thu 2/5

6:00 am-10:50 am

2 stops20h 50m

London Gatwick

Fri 2/20

11:45 am-1:57 pm

2 stops34h 12m

$924

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Tue 3/10

7:00 am-10:55 am

2 stops20h 55m

London Gatwick

Tue 3/17

11:55 am-10:44 pm

2 stops17h 49m

$926

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 4/15

6:00 am-2:40 pm

2 stops24h 40m

London Gatwick

Tue 5/5

1:00 pm-10:38 pm

2 stops17h 38m

$979

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 3/4

6:14 am-10:55 am

2 stops20h 41m

London Gatwick

Sun 3/8

11:55 am-11:32 pm

2 stops18h 37m

$1,006

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 3/4

6:14 am-10:55 am

2 stops20h 41m

London Gatwick

Sun 3/8

11:55 am-11:32 pm

2 stops18h 37m

$1,007

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 4/15

11:30 am-2:40 pm

2 stops19h 10m

London Gatwick

Tue 5/5

1:00 pm-10:38 pm

2 stops17h 38m

$1,009

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 1/21

6:30 am-10:55 am

2 stops20h 25m

London Gatwick

Thu 1/29

11:55 am-11:56 pm

2 stops20h 01m

$1,010

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 $718.

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

Flying to London Gatwick Airport from Ontario in the evening is the least expensive time of day to depart. momondo users have found prices as low as $639 when looking at flights departing in the evening. In the morning is when there is more demand to fly to London Gatwick Airport, so prices are often more expensive at around $820 per ticket.

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

16h 11m

Direct flights

None
The fastest flight from Ontario to London Gatwick Airport takes 16h 11m
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 16h 05m, 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
Milton Keynes
Dover
Luton
Slough
Guildford
Hayes
Dartford
Crawley
Brentwood
Wembley
Romford
Watford
Ilford
Cobham
Folkestone
Uxbridge
Stansted
Chelmsford

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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