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Cheap flights from Ontario to London from $243

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 11/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Ontario to London

Cheap round-trip flights

Iberia Logo
6:10 am - 10:50 amONT-LGW
20h 40m2 stops
Iberia Logo
7:40 pm - 11:30 amLGW-ONT
23h 50m2 stops
$691Iberia
Find Deal
Tue, Dec 2 - Wed, Dec 10
American Airlines Logo
11:59 pm - 7:30 amONT-LGW
23h 31m2 stops
American Airlines Logo
12:30 pm - 2:57 pmLGW-ONT
34h 27m2 stops
$789American Airlines
Find Deal
Mon, Dec 29 - Thu, Jan 15
Iberia Logo
6:38 am - 10:50 amONT-LGW
20h 12m2 stops
Iberia Logo
7:40 pm - 11:30 amLGW-ONT
23h 50m2 stops
$925Iberia
Find Deal
Thu, Nov 27 - Wed, Dec 3
Logo
11:15 am - 10:55 amONT-LGW
15h 40m2 stops
Logo
11:55 am - 10:05 pmLGW-ONT
18h 10m2 stops
$969
Find Deal
Wed, Nov 5 - Wed, Nov 12
Logo
11:15 am - 10:55 amONT-LGW
15h 40m2 stops
Logo
11:55 am - 10:05 pmLGW-ONT
18h 10m2 stops
$970
Find Deal
Wed, Dec 3 - Thu, Dec 11
Logo
9:00 am - 10:55 amONT-LGW
18h 55m2 stops
Logo
11:55 am - 11:32 pmLGW-ONT
19h 37m2 stops
$1,000
Find Deal
Mon, Oct 27 - Fri, Nov 7
Logo
9:00 am - 10:55 amONT-LGW
18h 55m2 stops
Logo
11:55 am - 11:32 pmLGW-ONT
19h 37m2 stops
$1,001
Find Deal
Mon, Oct 27 - Fri, Nov 7
Logo
10:50 am - 10:55 amONT-LGW
16h 05m2 stops
Logo
11:55 am - 10:05 pmLGW-ONT
18h 10m2 stops
$1,059
Find Deal
Fri, Nov 7 - Tue, Nov 11
British Airways Logo
6:00 am - 7:00 pmONT-LGW
29h 00m2 stops
British Airways Logo
11:45 am - 5:53 pmLGW-ONT
62h 08m2 stops
$1,101British Airways
Find Deal
Fri, Dec 12 - Wed, Jan 7
British Airways Logo
2:56 pm - 7:00 pmONT-LGW
44h 04m2 stops
British Airways Logo
11:45 am - 1:48 pmLGW-ONT
58h 03m2 stops
$1,110British Airways
Find Deal
Thu, Dec 11 - Wed, Jan 7

Iberia flights from Ontario to London Gatwick Airport

Our best Iberia deals on Ontario to London Gatwick Airport flight tickets
Iberia
Dec 2
ONT6:10 amOntario
20h 40m
2 stops
LGW10:50 amLondon Gatwick
Dec 10
LGW7:40 pmLondon Gatwick
23h 50m
2 stops
ONT11:30 amOntario
$691
Find similar
Iberia
Nov 27
ONT6:38 amOntario
20h 12m
2 stops
LGW10:50 amLondon Gatwick
Dec 3
LGW7:40 pmLondon Gatwick
23h 50m
2 stops
ONT11:30 amOntario
$925
Find similar
Iberia
Sep 24
ONT10:54 amOntario
25h 06m
2 stops
LGW8:00 pmLondon Gatwick
Oct 11
LGW11:35 amLondon Gatwick
19h 07m
2 stops
ONT10:42 pmOntario
$1,211
Find similar

American Airlines flights from Ontario to London Gatwick Airport

Our best American Airlines deals on Ontario to London Gatwick Airport flight tickets
American Airlines
Dec 29
ONT11:59 pmOntario
23h 31m
2 stops
LGW7:30 amLondon Gatwick
Jan 15
LGW12:30 pmLondon Gatwick
34h 27m
2 stops
ONT2:57 pmOntario
$789
Find similar
American Airlines
Sep 6
ONT6:10 amOntario
20h 30m
2 stops
LGW10:40 amLondon Gatwick
Sep 20
LGW3:05 pmLondon Gatwick
28h 51m
2 stops
ONT11:56 amOntario
$1,233
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 August 28, 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 12/2

6:10 am-10:50 am

2 stops20h 40m

London Gatwick

Wed 12/10

7:40 pm-11:30 am

2 stops23h 50m

$691

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Mon 12/29

11:59 pm-7:30 am

2 stops23h 31m

London Gatwick

Thu 1/15

12:30 pm-2:57 pm

2 stops34h 27m

$789

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Thu 11/27

6:38 am-10:50 am

2 stops20h 12m

London Gatwick

Wed 12/3

7:40 pm-11:30 am

2 stops23h 50m

$925

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 11/5

11:15 am-10:55 am

2 stops15h 40m

London Gatwick

Wed 11/12

11:55 am-10:05 pm

2 stops18h 10m

$969

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 12/3

11:15 am-10:55 am

2 stops15h 40m

London Gatwick

Thu 12/11

11:55 am-10:05 pm

2 stops18h 10m

$970

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Mon 10/27

9:00 am-10:55 am

2 stops18h 55m

London Gatwick

Fri 11/7

11:55 am-11:32 pm

2 stops19h 37m

$1,000

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Mon 10/27

9:00 am-10:55 am

2 stops18h 55m

London Gatwick

Fri 11/7

11:55 am-11:32 pm

2 stops19h 37m

$1,001

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Fri 11/7

10:50 am-10:55 am

2 stops16h 05m

London Gatwick

Tue 11/11

11:55 am-10:05 pm

2 stops18h 10m

$1,059

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Fri 12/12

6:00 am-7:00 pm

2 stops29h 00m

London Gatwick

Wed 1/7

11:45 am-5:53 pm

2 stops62h 08m

$1,101

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Thu 12/11

2:56 pm-7:00 pm

2 stops44h 04m

London Gatwick

Wed 1/7

11:45 am-1:48 pm

2 stops58h 03m

$1,110

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 $569. 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 $722.

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

Direct flights

None
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 15h 40m, 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
Luton
Dover
Slough
Milton Keynes
Guildford
Dartford
Crawley
Stansted
Hayes
Chelmsford
Brentwood
Ilford
Folkestone
Colchester
Watford
Canterbury
Richmond
Wembley

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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