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Cheap flights from Ontario to London from £218

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

Cheap return flights

Enter your travel dates to find the best prices.
Iberia Logo
06:00 - 10:50ONT-LGW
20h 50m2 stops
Iberia Logo
19:40 - 14:18LGW-ONT
26h 38m2 stops
£592Iberia
Find Deal
Thu, 5 Feb - Mon, 9 Feb
American Airlines Logo
06:22 - 09:00ONT-LGW
18h 38m2 stops
American Airlines Logo
11:20 - 12:03LGW-ONT
56h 43m2 stops
£607American Airlines
Find Deal
Wed, 28 Jan - Sun, 1 Feb
Multiple Airlines Logo
07:00 - 10:55ONT-LGW
20h 55m2 stops
Multiple Airlines Logo
11:55 - 22:44LGW-ONT
17h 49m2 stops
£697Multiple Airlines
Find Deal
Tue, 10 Mar - Tue, 17 Mar
Multiple Airlines Logo
06:00 - 14:40ONT-LGW
24h 40m2 stops
Multiple Airlines Logo
13:00 - 22:38LGW-ONT
17h 38m2 stops
£737Multiple Airlines
Find Deal
Wed, 15 Apr - Tue, 5 May
Multiple Airlines Logo
06:14 - 10:55ONT-LGW
20h 41m2 stops
Multiple Airlines Logo
11:55 - 23:32LGW-ONT
18h 37m2 stops
£757Multiple Airlines
Find Deal
Wed, 4 Mar - Sun, 8 Mar
Multiple Airlines Logo
06:14 - 10:55ONT-LGW
20h 41m2 stops
Multiple Airlines Logo
11:55 - 23:32LGW-ONT
18h 37m2 stops
£758Multiple Airlines
Find Deal
Wed, 4 Mar - Sun, 8 Mar
Multiple Airlines Logo
06:30 - 10:55ONT-LGW
20h 25m2 stops
Multiple Airlines Logo
11:55 - 23:56LGW-ONT
20h 01m2 stops
£760Multiple Airlines
Find Deal
Wed, 21 Jan - Thu, 29 Jan
Multiple Airlines Logo
06:14 - 10:55ONT-LGW
20h 41m2 stops
Multiple Airlines Logo
11:55 - 23:32LGW-ONT
18h 37m2 stops
£780Multiple Airlines
Find Deal
Thu, 5 Mar - Thu, 12 Mar
Multiple Airlines Logo
06:14 - 10:55ONT-LGW
20h 41m2 stops
Multiple Airlines Logo
11:55 - 23:32LGW-ONT
18h 37m2 stops
£780Multiple Airlines
Find Deal
Thu, 5 Mar - Thu, 12 Mar
Multiple Airlines Logo
08:25 - 10:55ONT-LGW
19h 30m2 stops
Multiple Airlines Logo
11:55 - 23:32LGW-ONT
18h 37m2 stops
£783Multiple Airlines
Find Deal
Mon, 9 Mar - Fri, 13 Mar

Iberia flights from Ontario to London Gatwick Airport

Our best Iberia deals on Ontario to London Gatwick Airport flight tickets
Iberia
5 Feb
ONT06:00Ontario
20h 50m
2 stops
LGW10:50London Gatwick
9 Feb
LGW19:40London Gatwick
26h 38m
2 stops
ONT14:18Ontario
£592
Find similar
Iberia
9 Dec
ONT07:00Ontario
19h 50m
2 stops
LGW10:50London Gatwick
15 Apr
LGW20:40London Gatwick
35h 00m
2 stops
ONT23:40Ontario
£728
Find similar
Iberia
11 Dec
ONT07:03Ontario
19h 47m
2 stops
LGW10:50London Gatwick
15 Apr
LGW20:40London Gatwick
35h 00m
2 stops
ONT23:40Ontario
£765
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
8 Dec
ONT06:00Ontario
29h 00m
2 stops
LGW19:00London Gatwick
15 Apr
LGW11:35London Gatwick
20h 05m
2 stops
ONT23:40Ontario
£867
Find similar
British Airways
7 Dec
ONT23:59Ontario
35h 01m
2 stops
LGW19:00London Gatwick
15 Apr
LGW11:35London Gatwick
20h 05m
2 stops
ONT23:40Ontario
£874
Find similar
British Airways
8 Dec
ONT06:00Ontario
29h 00m
2 stops
LGW19:00London Gatwick
13 Apr
LGW20:40London Gatwick
33h 16m
2 stops
ONT21:56Ontario
£924
Find similar

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 4 December 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

Thu 5/2

06:00-10:50

2 stops20h 50m

London Gatwick

Mon 9/2

19:40-14:18

2 stops26h 38m

£592

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 28/1

06:22-09:00

2 stops18h 38m

London Gatwick

Sun 1/2

11:20-12:03

2 stops56h 43m

£607

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Tue 10/3

07:00-10:55

2 stops20h 55m

London Gatwick

Tue 17/3

11:55-22:44

2 stops17h 49m

£697

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 15/4

06:00-14:40

2 stops24h 40m

London Gatwick

Tue 5/5

13:00-22:38

2 stops17h 38m

£737

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 4/3

06:14-10:55

2 stops20h 41m

London Gatwick

Sun 8/3

11:55-23:32

2 stops18h 37m

£757

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 4/3

06:14-10:55

2 stops20h 41m

London Gatwick

Sun 8/3

11:55-23:32

2 stops18h 37m

£758

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Wed 21/1

06:30-10:55

2 stops20h 25m

London Gatwick

Thu 29/1

11:55-23:56

2 stops20h 01m

£760

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Thu 5/3

06:14-10:55

2 stops20h 41m

London Gatwick

Thu 12/3

11:55-23:32

2 stops18h 37m

£780

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Thu 5/3

06:14-10:55

2 stops20h 41m

London Gatwick

Thu 12/3

11:55-23:32

2 stops18h 37m

£780

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Mon 9/3

08:25-10:55

2 stops19h 30m

London Gatwick

Fri 13/3

11:55-23:32

2 stops18h 37m

£783

Flights are sorted by cheapest return 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?

According to our data, Tuesday is the cheapest day to fly to London Gatwick Airport from Ontario. The lowest ticket price found for a Tuesday departure recently was £303. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Ontario to London Gatwick Airport on a Saturday will generally be more expensive and average around £546. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our data shows that the cheapest Ontario to London Gatwick Airport flights are usually those with departure times in the afternoon. Our users have found flights to London Gatwick Airport in the afternoon for as low as £441. In contrast, the most expensive time of day to depart to London Gatwick Airport is in the morning when prices are around £551.

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 return 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 distance between Ontario and London Gatwick is about 5431.4 mi. In terms of flight time, this usually takes a little over 16h 05m.

  • 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 refresh daily.

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to London Gatwick Airport.

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

    The travel and health documents you'll need for your trip to London Gatwick Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Gatwick Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Gatwick
Maidstone
Slough
Canterbury
Southend-on-Sea
Ipswich
Ilford
Guildford
Hayes
Dover
Chelmsford
Colchester
Worthing
Bedford
Ramsgate
Hounslow
Stansted

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to London . Millions of users trust and use momondo every year so you are in good hands.

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

Flights from Ontario to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to London.

I’m not ready to book a flight from Ontario to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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