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Cheap flights from Ontario to London from $416

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 12/7. 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
6:10 am - 10:50 amONT-LGW
20h 40m2 stops
Iberia Logo
7:40 pm - 11:53 amLGW-ONT
24h 13m2 stops
$843Iberia
Find Deal
mar., dic. 2 - mié., dic. 10
American Airlines Logo
6:47 am - 7:30 amONT-LGW
16h 43m2 stops
American Airlines Logo
12:30 pm - 5:49 pmLGW-ONT
36h 19m2 stops
$849American Airlines
Find Deal
mié., mar. 4 - dom., mar. 8
Iberia Logo
10:58 am - 7:00 pmONT-LGW
48h 02m2 stops
Iberia Logo
11:45 am - 2:18 pmLGW-ONT
34h 33m2 stops
$852Iberia
Find Deal
lun., ene. 12 - mié., ene. 28
Multiple Airlines Logo
11:15 am - 10:55 amONT-LGW
15h 40m2 stops
Multiple Airlines Logo
11:55 am - 11:29 pmLGW-ONT
19h 34m2 stops
$948Multiple Airlines
Find Deal
mié., dic. 3 - jue., dic. 11
Multiple Airlines Logo
11:15 am - 10:55 amONT-LGW
15h 40m2 stops
Multiple Airlines Logo
11:55 am - 10:05 pmLGW-ONT
18h 10m2 stops
$960Multiple Airlines
Find Deal
mar., nov. 11 - mar., nov. 18
Multiple Airlines Logo
6:00 am - 10:55 amONT-LGW
20h 55m2 stops
Multiple Airlines Logo
11:55 am - 10:37 pmLGW-ONT
17h 42m2 stops
$978Multiple Airlines
Find Deal
mié., mar. 4 - dom., mar. 8
Iberia Logo
6:10 am - 10:50 amONT-LGW
20h 40m2 stops
Iberia Logo
7:40 pm - 11:53 amLGW-ONT
24h 13m2 stops
$988Iberia
Find Deal
jue., nov. 27 - mié., dic. 3
American Airlines Logo
9:59 am - 7:30 amONT-LGW
37h 31m2 stops
American Airlines Logo
12:30 pm - 6:17 pmLGW-ONT
37h 47m2 stops
$990American Airlines
Find Deal
sáb., nov. 29 - lun., dic. 15
British Airways Logo
3:09 pm - 8:00 pmONT-LGW
44h 51m2 stops
British Airways Logo
8:40 pm - 11:40 pmLGW-ONT
35h 00m2 stops
$1,373British Airways
Find Deal
dom., mar. 29 - mié., abr. 8
British Airways Logo
3:09 pm - 8:00 pmONT-LGW
44h 51m2 stops
British Airways Logo
8:40 pm - 11:40 pmLGW-ONT
35h 00m2 stops
$1,473British Airways
Find Deal
dom., mar. 29 - mar., abr. 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
24h 13m
2 stops
ONT11:53 amOntario
$843
Find similar
Iberia
Jan 12
ONT10:58 amOntario
48h 02m
2 stops
LGW7:00 pmLondon Gatwick
Jan 28
LGW11:45 amLondon Gatwick
34h 33m
2 stops
ONT2:18 pmOntario
$852
Find similar
Iberia
Nov 27
ONT6:10 amOntario
20h 40m
2 stops
LGW10:50 amLondon Gatwick
Dec 3
LGW7:40 pmLondon Gatwick
24h 13m
2 stops
ONT11:53 amOntario
$988
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
Mar 4
ONT6:47 amOntario
16h 43m
2 stops
LGW7:30 amLondon Gatwick
Mar 8
LGW12:30 pmLondon Gatwick
36h 19m
2 stops
ONT5:49 pmOntario
$849
Find similar
American Airlines
Nov 29
ONT9:59 amOntario
37h 31m
2 stops
LGW7:30 amLondon Gatwick
Dec 15
LGW12:30 pmLondon Gatwick
37h 47m
2 stops
ONT6:17 pmOntario
$990
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 octubre 14, 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

mar. 12/2

6:10 am-10:50 am

2 stops20h 40m

London Gatwick

mié. 12/10

7:40 pm-11:53 am

2 stops24h 13m

$843

OntarioLondon

ONT - LGW

ONTLGW

Ontario

mié. 3/4

6:47 am-7:30 am

2 stops16h 43m

London Gatwick

dom. 3/8

12:30 pm-5:49 pm

2 stops36h 19m

$849

OntarioLondon

ONT - LGW

ONTLGW

Ontario

lun. 1/12

10:58 am-7:00 pm

2 stops48h 02m

London Gatwick

mié. 1/28

11:45 am-2:18 pm

2 stops34h 33m

$852

OntarioLondon

ONT - LGW

ONTLGW

Ontario

mié. 12/3

11:15 am-10:55 am

2 stops15h 40m

London Gatwick

jue. 12/11

11:55 am-11:29 pm

2 stops19h 34m

$948

OntarioLondon

ONT - LGW

ONTLGW

Ontario

mar. 11/11

11:15 am-10:55 am

2 stops15h 40m

London Gatwick

mar. 11/18

11:55 am-10:05 pm

2 stops18h 10m

$960

OntarioLondon

ONT - LGW

ONTLGW

Ontario

mié. 3/4

6:00 am-10:55 am

2 stops20h 55m

London Gatwick

dom. 3/8

11:55 am-10:37 pm

2 stops17h 42m

$978

OntarioLondon

ONT - LGW

ONTLGW

Ontario

jue. 11/27

6:10 am-10:50 am

2 stops20h 40m

London Gatwick

mié. 12/3

7:40 pm-11:53 am

2 stops24h 13m

$988

OntarioLondon

ONT - LGW

ONTLGW

Ontario

sáb. 11/29

9:59 am-7:30 am

2 stops37h 31m

London Gatwick

lun. 12/15

12:30 pm-6:17 pm

2 stops37h 47m

$990

OntarioLondon

ONT - LGW

ONTLGW

Ontario

dom. 3/29

3:09 pm-8:00 pm

2 stops44h 51m

London Gatwick

mié. 4/8

8:40 pm-11:40 pm

2 stops35h 00m

$1,373

OntarioLondon

ONT - LGW

ONTLGW

Ontario

dom. 3/29

3:09 pm-8:00 pm

2 stops44h 51m

London Gatwick

mar. 4/7

8:40 pm-11:40 pm

2 stops35h 00m

$1,473

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 $721.

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
Gatwick
Hounslow
Milton Keynes
Luton
Dover
Slough
Guildford
Dartford
Hayes
Crawley
Chelmsford
Brentwood
Colchester
Ilford
Folkestone
Romford
Cobham
Stansted
Watford
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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