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Cheap flights from Ontario to London Heathrow Airport from £296

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 Heathrow Airport departing on 9/10. 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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Cheap return flights

KAYAK's recommended return flight deals from the most popular airlines that fly from Ontario to London.
Lufthansa Logo
13:15 - 09:40ONT-LHR
12h 25m1 stop
Lufthansa Logo
11:25 - 17:17LHR-ONT
13h 52m1 stop
£500Lufthansa
Find Deal
Wed, 1 Oct - Wed, 15 Oct
Lufthansa Logo
13:15 - 09:40ONT-LHR
12h 25m1 stop
Lufthansa Logo
11:25 - 17:17LHR-ONT
13h 52m1 stop
£502Lufthansa
Find Deal
Tue, 23 Sep - Tue, 21 Oct
Iberia Logo
14:59 - 14:25ONT-LHR
15h 26m1 stop
Iberia Logo
10:50 - 23:36LHR-ONT
20h 46m2 stops
£525Iberia
Find Deal
Wed, 27 Aug - Wed, 10 Sep
Air Canada Logo
05:10 - 06:35ONT-LHR
17h 25m2 stops
Air Canada Logo
14:10 - 17:37LHR-ONT
35h 27m2 stops
£528Air Canada
Find Deal
Sun, 24 Aug - Thu, 11 Sep
United Airlines Logo
13:20 - 09:40ONT-LHR
12h 20m1 stop
United Airlines Logo
09:30 - 20:34LHR-ONT
19h 04m2 stops
£531United Airlines
Find Deal
Wed, 7 May - Wed, 14 May
Iberia Logo
12:51 - 14:25ONT-LHR
17h 34m1 stop
Iberia Logo
20:00 - 00:02LHR-ONT
36h 02m2 stops
£532Iberia
Find Deal
Mon, 6 Oct - Mon, 13 Oct
Delta Logo
12:00 - 11:10ONT-LHR
15h 10m1 stop
Delta Logo
11:20 - 19:42LHR-ONT
16h 22m1 stop
£540Delta
Find Deal
Sun, 24 Aug - Wed, 10 Sep
United Airlines Logo
16:15 - 12:20ONT-LHR
12h 05m1 stop
United Airlines Logo
14:50 - 21:04LHR-ONT
14h 14m1 stop
£540United Airlines
Find Deal
Wed, 7 May - Thu, 22 May
Air Canada Logo
05:05 - 11:50ONT-LHR
22h 45m2 stops
Air Canada Logo
14:05 - 20:53LHR-ONT
38h 48m2 stops
£603Air Canada
Find Deal
Sat, 10 May - Sat, 17 May
Delta Logo
07:05 - 13:30ONT-LHR
22h 25m1 stop
Delta Logo
08:40 - 22:35LHR-ONT
21h 55m2 stops
£605Delta
Find Deal
Sat, 10 May - Sat, 17 May

United Airlines flights from Ontario to London Heathrow Airport

Our best United Airlines deals on Ontario to London Heathrow Airport flight tickets
United Airlines
7 May
ONT13:20Ontario
12h 20m
1 stop
LHR09:40London Heathrow
14 May
LHR09:30London Heathrow
19h 04m
2 stops
ONT20:34Ontario
United Airlines
7 May
ONT16:15Ontario
12h 05m
1 stop
LHR12:20London Heathrow
22 May
LHR14:50London Heathrow
14h 14m
1 stop
ONT21:04Ontario
United Airlines
23 Aug
ONT18:36Ontario
28h 49m
1 stop
LHR07:25London Heathrow
4 Sept
LHR14:50London Heathrow
13h 43m
1 stop
ONT20:33Ontario

British Airways flights from Ontario to London Heathrow Airport

Our best British Airways deals on Ontario to London Heathrow Airport flight tickets
British Airways
28 Jul
ONT16:45Ontario
12h 05m
1 stop
LHR12:50London Heathrow
7 Sept
LHR15:40London Heathrow
14h 00m
1 stop
ONT21:40Ontario
British Airways
25 Sept
ONT12:49Ontario
14h 01m
1 stop
LHR10:50London Heathrow
24 Oct
LHR15:40London Heathrow
32h 56m
1 stop
ONT16:36Ontario
British Airways
8 May
ONT16:35Ontario
12h 15m
1 stop
LHR12:50London Heathrow
15 May
LHR15:40London Heathrow
14h 17m
1 stop
ONT21:57Ontario

See travel insights to London from

How to get the cheapest flight ticket from 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?

In general, March is the cheapest month to fly from Ontario to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £503. The month of February is another great option to travel to London Heathrow Airport, with average flight prices from Ontario averaging around £507.

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

On average, the least expensive day to fly to London Heathrow Airport from Ontario is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as £540. However, this price may fluctuate depending on the airline, the season, and holidays. 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 Heathrow Airport on Saturday is £657.

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

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from Ontario to London Heathrow Airport in the morning for as low as £548. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying at midday when prices are £664 on average. Flights to London Heathrow Airport from Ontario at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

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 Ontario when booking 16 weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £623 when searching 16 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Ontario for as low as £549 on momondo.

When to book flights from Ontario to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Ontario to London Heathrow Airport (ONT to LHR) flight deals and tips

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

Best price found

£296

Fastest flight time

12h 00m

Direct flights

None
The best one-way flight to London Heathrow Airport from Ontario in the past 72 hours is £296. The best return flight deal from Ontario to London Heathrow Airport found on momondo in the last 72 hours is £500.
The fastest flight from Ontario to London Heathrow Airport takes 12h 00m
There are no direct flights from Ontario to London Heathrow Airport. Popular non-direct route for this connection is Ontario Airport - London Heathrow Airport.

  • How far is Ontario to London Heathrow by plane?

    London Heathrow is 5408.1 mi away from Ontario. In terms of flight time, this usually takes a little over 12h 05m.

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

    Prices for flights from Ontario Airport to London Heathrow Airport refresh daily.

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

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

    The travel and health documents you'll need for your trip to London Heathrow 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 Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.


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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?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Ontario.

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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