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Cheap flights from Ontario to London from C$ 401

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 31/5. 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

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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.
TAP AIR PORTUGAL Logo
10:45 p.m. - 5:45 p.m.
YUL
-
LHR
14h 00m
1 stop
TAP AIR PORTUGAL Logo
7:50 p.m. - 8:45 p.m.
LHR
-
YUL
29h 55m
1 stop
C$ 684TAP AIR PORTUGAL
Mon, 20 Apr - Tue, 28 Apr
TAP AIR PORTUGAL Logo
10:45 p.m. - 5:45 p.m.
YUL
-
LHR
14h 00m
1 stop
TAP AIR PORTUGAL Logo
7:50 p.m. - 9:10 p.m.
LHR
-
YUL
30h 20m
1 stop
C$ 691TAP AIR PORTUGAL
Fri, 5 Jun - Sat, 20 Jun
Icelandair Logo
11:10 p.m. - 11:55 a.m.
YYZ
-
LHR
31h 45m
1 stop
Icelandair Logo
1:05 p.m. - 7:10 p.m.
LHR
-
YYZ
11h 05m
1 stop
C$ 706Icelandair
Wed, 1 Apr - Thu, 23 Apr
Icelandair Logo
8:45 p.m. - 8:20 p.m.
YYZ
-
LHR
18h 35m
1 stop
Icelandair Logo
9:25 p.m. - 10:05 p.m.
LHR
-
YYZ
29h 40m
1 stop
C$ 707Icelandair
Sun, 12 Apr - Sun, 26 Apr
Multiple Airlines Logo
11:10 p.m. - 9:40 p.m.
YYZ
-
LHR
17h 30m
2 stops
Multiple Airlines Logo
10:30 a.m. - 7:10 p.m.
LHR
-
YYZ
13h 40m
2 stops
C$ 718Multiple Airlines
Mon, 1 Jun - Tue, 9 Jun
Air Canada Logo
3:40 p.m. - 6:30 a.m.
YTZ
-
LHR
9h 50m
1 stop
Air Canada Logo
1:50 p.m. - 5:52 p.m.
LHR
-
YTZ
33h 02m
2 stops
C$ 739Air Canada
Thu, 16 Apr - Thu, 23 Apr
Multiple Airlines Logo
3:40 p.m. - 6:30 a.m.
YTZ
-
LHR
9h 50m
1 stop
Multiple Airlines Logo
1:50 p.m. - 10:07 a.m.
LHR
-
YTZ
49h 17m
2 stops
C$ 742Multiple Airlines
Thu, 16 Apr - Mon, 20 Apr
Air Canada Logo
8:55 p.m. - 6:30 a.m.
YTZ
-
LHR
28h 35m
1 stop
Air Canada Logo
1:50 p.m. - 8:52 a.m.
LHR
-
YTZ
48h 02m
2 stops
C$ 746Air Canada
Wed, 15 Apr - Wed, 22 Apr
United Airlines Logo
9:25 a.m. - 10:40 a.m.
YXU
-
LHR
20h 15m
2 stops
United Airlines Logo
11:05 a.m. - 8:44 a.m.
LHR
-
YXU
26h 39m
2 stops
C$ 982United Airlines
Wed, 15 Apr - Wed, 22 Apr
United Airlines Logo
5:40 p.m. - 10:40 a.m.
YXU
-
LHR
12h 00m
2 stops
United Airlines Logo
11:05 a.m. - 8:44 a.m.
LHR
-
YXU
26h 39m
2 stops
C$ 984United Airlines
Mon, 13 Apr - Mon, 20 Apr

United Airlines flights from Region of Ontario to London Heathrow Airport

Our best United Airlines deals on Region of Ontario to London Heathrow Airport flight tickets
United Airlines
24 May
YOW7:30 p.m.Ottawa
10h 10m
1 stop
LHR10:40 a.m.London Heathrow
31 May
LHR8:45 a.m.London Heathrow
20h 09m
2 stops
YOW11:54 p.m.Ottawa
C$ 843
United Airlines
23 May
YOW7:30 p.m.Ottawa
21h 05m
2 stops
LHR9:35 p.m.London Heathrow
7 Jun
LHR6:50 a.m.London Heathrow
22h 04m
2 stops
YOW11:54 p.m.Ottawa
C$ 852
United Airlines
22 May
YOW12:00 p.m.Ottawa
41h 40m
2 stops
LHR10:40 a.m.London Heathrow
31 May
LHR8:45 a.m.London Heathrow
20h 09m
2 stops
YOW11:54 p.m.Ottawa
C$ 866

Icelandair flights from Region of Ontario to London Heathrow Airport

Our best Icelandair deals on Region of Ontario to London Heathrow Airport flight tickets
Icelandair
1 Apr
YYZ11:10 p.m.Toronto Pearson Intl
31h 45m
1 stop
LHR11:55 a.m.London Heathrow
23 Apr
LHR1:05 p.m.London Heathrow
11h 05m
1 stop
YYZ7:10 p.m.Toronto Pearson Intl
C$ 706
Icelandair
12 Apr
YYZ8:45 p.m.Toronto Pearson Intl
18h 35m
1 stop
LHR8:20 p.m.London Heathrow
26 Apr
LHR9:25 p.m.London Heathrow
29h 40m
1 stop
YYZ10:05 p.m.Toronto Pearson Intl
C$ 707
Icelandair
1 Apr
YYZ11:10 p.m.Toronto Pearson Intl
31h 45m
1 stop
LHR11:55 a.m.London Heathrow
25 Apr
LHR9:25 p.m.London Heathrow
26h 45m
1 stop
YYZ7:10 p.m.Toronto Pearson Intl
C$ 709

momondo Fare Finder

 
Customize your flight search to find flights from Region of Ontario to London Heathrow 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 96,600 searches. Data last updated 4 March 2026.
Use the filters below to find and compare flights from Ontario to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 20/4

10:45 p.m.-5:45 p.m.

1 stop14h 00m

London Heathrow

Tue 28/4

7:50 p.m.-8:45 p.m.

1 stop29h 55m

C$ 684

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 5/6

10:45 p.m.-5:45 p.m.

1 stop14h 00m

London Heathrow

Sat 20/6

7:50 p.m.-9:10 p.m.

1 stop30h 20m

C$ 691

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 1/4

11:10 p.m.-11:55 a.m.

1 stop31h 45m

London Heathrow

Thu 23/4

1:05 p.m.-7:10 p.m.

1 stop11h 05m

C$ 706

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 12/4

8:45 p.m.-8:20 p.m.

1 stop18h 35m

London Heathrow

Sun 26/4

9:25 p.m.-10:05 p.m.

1 stop29h 40m

C$ 707

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 1/6

11:10 p.m.-9:40 p.m.

2 stops17h 30m

London Heathrow

Tue 9/6

10:30 a.m.-7:10 p.m.

2 stops13h 40m

C$ 718

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Thu 16/4

3:40 p.m.-6:30 a.m.

1 stop9h 50m

London Heathrow

Thu 23/4

1:50 p.m.-5:52 p.m.

2 stops33h 02m

C$ 739

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Thu 16/4

3:40 p.m.-6:30 a.m.

1 stop9h 50m

London Heathrow

Mon 20/4

1:50 p.m.-10:07 a.m.

2 stops49h 17m

C$ 742

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Wed 15/4

8:55 p.m.-6:30 a.m.

1 stop28h 35m

London Heathrow

Wed 22/4

1:50 p.m.-8:52 a.m.

2 stops48h 02m

C$ 746

LondonLondon

YXU - LHR

YXULHR

London

Wed 15/4

9:25 a.m.-10:40 a.m.

2 stops20h 15m

London Heathrow

Wed 22/4

11:05 a.m.-8:44 a.m.

2 stops26h 39m

C$ 982

LondonLondon

YXU - LHR

YXULHR

London

Mon 13/4

5:40 p.m.-10:40 a.m.

2 stops12h 00m

London Heathrow

Mon 20/4

11:05 a.m.-8:44 a.m.

2 stops26h 39m

C$ 984

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 Region of Ontario to London Heathrow 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 month to fly to London Heathrow Airport?

The month of May is, on average, the cheapest month to fly to London Heathrow Airport from Region of Ontario, with most prices found around C$ 784. If you aren’t able to travel to London Heathrow Airport during the month of May, then flying in October is also cheap. Prices for this month can be found on momondo for an average of C$ 796.

What is the cheapest day to depart on your flight to London Heathrow Airport?

According to our data, Sunday is the cheapest day to fly to London Heathrow Airport from Region of Ontario. The lowest ticket price found for a Sunday departure recently was C$ 1,226. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Region of Ontario to London Heathrow Airport for around C$ 1,340.

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

Our data shows that the cheapest Region of Ontario to London Heathrow Airport flights are usually those with departure times in the evening. Our users have found flights to London Heathrow Airport in the evening for as low as C$ 1,284. In the afternoon is when there is more demand to fly to London Heathrow Airport, so prices are often more expensive at around C$ 1,308 per ticket.

What is the cheapest Ontario to London Heathrow flight route?

Fly from Toronto Pearson Intl to London Heathrow for the best Ontario - London Heathrow flight prices

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around C$ 926 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Region of Ontario for as low as C$ 847 on momondo.

What cabin class options are available on Ontario to London Heathrow flights?

There are 4 cabin classes available to choose from on Ontario to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Region of Ontario to London Heathrow Airport flights?

You could potentially save up to 5% on your flight if you consider stops on a Region of Ontario to London Heathrow Airport flight.

Cheap Region of Ontario to London Heathrow Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to London Heathrow Airport

Best price found

C$ 625

Fastest flight time

6h 25m

Direct flights

Mon, Tue, Thu, Fri, Sat and Sun
The best one-way flight to London Heathrow Airport from Region of Ontario in the past 72 hours is C$ 625. The best round-trip flight deal from Region of Ontario to London Heathrow Airport found on momondo in the last 72 hours is C$ 921.
The fastest flight from Region of Ontario to London Heathrow Airport takes 6h 25m
Direct flights go from Region of Ontario to London Heathrow Airport on Monday, Tuesday, Thursday, Friday, Saturday and Sunday. There are no airlines offering direct flights.
Search flight deals

  • When did momondo last update prices for flights from Ontario to London Heathrow Airport?

    Prices for flights from Ontario to London Heathrow Airport are updated daily.

  • How many operators does momondo search for flights from Ontario to London Heathrow Airport?

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario to London Heathrow Airport.

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

    The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Region of Ontario to London Heathrow Airport?

Best airlines flying from Region of Ontario to London Heathrow Airport

Compare and see reviews for airlines that fly from Region of Ontario to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom C$ 217Free CancellationRating
7.2
3,281 reviews
Search WestJet flights
WestJet EncorePriceFrom C$ 546Free CancellationRating
0.0
Search WestJet Encore flights
TAP AIR PORTUGALPriceFrom C$ 594Free CancellationRating
7.1
2,155 reviews
Search TAP AIR PORTUGAL flights
Porter AirlinesPriceFrom C$ 614Free CancellationRating
8.0
421 reviews
Search Porter Airlines flights
IcelandairPriceFrom C$ 651Free CancellationRating
7.1
617 reviews
Search Icelandair flights
Air TransatPriceFrom C$ 660Free CancellationRating
7.7
517 reviews
Search Air Transat flights
American AirlinesPriceFrom C$ 701Free CancellationRating
7.1
11,378 reviews
Search American Airlines flights
British AirwaysPriceFrom C$ 704Free CancellationRating
6.7
7,774 reviews
Search British Airways flights
Aer LingusPriceFrom C$ 707Free CancellationRating
7.2
1,467 reviews
Search Aer Lingus flights
Air CanadaPriceFrom C$ 710Free CancellationRating
7.1
10,775 reviews
Search Air Canada flights

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Poole
Wembley
Ilford
Slough
Salisbury
Swindon
Gatwick
Wokingham
Stratford-upon-Avon
Crawley
Feltham
Hayes
Waterlooville
Newport
Chelmsford
Basingstoke
Milton Keynes
Dover
Worthing

Why use momondo?

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

It is quick and easy to find Ontario to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

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?

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?

If you are not ready to book a flight from Ontario to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

An easier way to manage your London Heathrow Airport trip

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