What is the cheapest airline that flies from London Heathrow to Ontario?

British Airways, United Airlines, and JetBlue are the most popular carriers operating from London Heathrow to Ontario

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

Prices for flights from London Heathrow Airport to Ontario Airport are refreshed on a daily basis.

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

What documentation or ID do you need to fly to Ontario Airport?

The necessary travel and health documents for your Ontario 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 licence 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.

€417 Cheap Flights from London Heathrow Airport to Ontario in 2026

Q: What is the typical price of a round-trip flight between London Heathrow Airport and Ontario?

Prices are currently low for flights on this route. Typical prices usually range from €785 to €590. The lowest price recently found on this route was €484.

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Find the cheapest flights from London Heathrow Airport to Los Angeles

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

07:25 - 18:16

LHR

ONT

18h 51m

2 stops

07:00 - 07:15

ONT

LHR

16h 15m

2 stops

€484United Airlines

Wed, 2 Sep - Wed, 23 Sep

07:30 - 20:20

LHR

ONT

20h 50m

2 stops

06:00 - 07:25

ONT

LHR

17h 25m

1 stop

€484United Airlines

Fri, 13 Nov - Tue, 17 Nov

13:40 - 21:59

LHR

ONT

16h 19m

1 stop

13:00 - 09:40

ONT

LHR

13h 40m

1 stop

€511United Airlines

Fri, 23 Oct - Thu, 29 Oct

13:40 - 21:55

LHR

ONT

16h 15m

1 stop

13:18 - 12:25

ONT

LHR

15h 07m

1 stop

€512United Airlines

Thu, 2 Jul - Tue, 4 Aug

11:25 - 20:53

LHR

ONT

17h 28m

1 stop

13:18 - 09:40

ONT

LHR

12h 22m

1 stop

€514United Airlines

Fri, 28 Aug - Sat, 5 Sep

08:30 - 22:51

LHR

ONT

22h 21m

2 stops

13:18 - 09:40

ONT

LHR

12h 22m

1 stop

€519United Airlines

Thu, 2 Jul - Sun, 5 Jul

06:30 - 16:30

LHR

ONT

18h 00m

2 stops

09:40 - 13:05

ONT

LHR

19h 25m

2 stops

€548Delta

Tue, 14 Jul - Tue, 21 Jul

08:40 - 23:48

LHR

ONT

23h 08m

2 stops

22:00 - 06:25

ONT

LHR

24h 25m

1 stop

€562Delta

Wed, 15 Jul - Wed, 22 Jul

08:40 - 22:41

LHR

ONT

22h 01m

2 stops

06:20 - 15:35

ONT

LHR

25h 15m

1 stop

€563Delta

Wed, 1 Jul - Thu, 30 Jul

09:00 - 22:51

LHR

ONT

21h 51m

2 stops

05:00 - 08:30

ONT

LHR

19h 30m

2 stops

€565United Airlines

Wed, 15 Jul - Wed, 22 Jul

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Alaska Airlines flights from London Heathrow Airport to Ontario

Our best Alaska Airlines deals on London Heathrow Airport to Ontario flight tickets

Alaska Airlines

17 Nov

LHR14:45London Heathrow

16h 09m

1 stop

ONT22:54Ontario

1 Dec

ONT12:00Ontario

16h 20m

1 stop

LHR12:20London Heathrow

€653

Alaska Airlines

18 Aug

LHR17:00London Heathrow

14h 11m

1 stop

ONT23:11Ontario

24 Aug

ONT12:00Ontario

19h 05m

1 stop

LHR15:05London Heathrow

€654

Alaska Airlines

13 Aug

LHR17:00London Heathrow

14h 11m

1 stop

ONT23:11Ontario

24 Nov

ONT12:00Ontario

16h 20m

1 stop

LHR12:20London Heathrow

€656

United Airlines flights from London Heathrow Airport to Ontario

Our best United Airlines deals on London Heathrow Airport to Ontario flight tickets

United Airlines

2 Sept

LHR07:25London Heathrow

18h 51m

2 stops

ONT18:16Ontario

23 Sept

ONT07:00Ontario

16h 15m

2 stops

LHR07:15London Heathrow

€484

United Airlines

13 Nov

LHR07:30London Heathrow

20h 50m

2 stops

ONT20:20Ontario

17 Nov

ONT06:00Ontario

17h 25m

1 stop

LHR07:25London Heathrow

€484

United Airlines

22 Jun

LHR14:50London Heathrow

13h 56m

1 stop

ONT20:46Ontario

5 Jul

ONT13:18Ontario

12h 22m

1 stop

LHR09:40London Heathrow

€509

momondo Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 2/9

07:25-18:16

2 stops18h 51m

Ontario

Wed 23/9

07:00-07:15

2 stops16h 15m

€484

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 13/11

07:30-20:20

2 stops20h 50m

Ontario

Tue 17/11

06:00-07:25

1 stop17h 25m

€484

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 23/10

13:40-21:59

1 stop16h 19m

Ontario

Thu 29/10

13:00-09:40

1 stop13h 40m

€511

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 2/7

13:40-21:55

1 stop16h 15m

Ontario

Tue 4/8

13:18-12:25

1 stop15h 07m

€512

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 28/8

11:25-20:53

1 stop17h 28m

Ontario

Sat 5/9

13:18-09:40

1 stop12h 22m

€514

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 2/7

08:30-22:51

2 stops22h 21m

Ontario

Sun 5/7

13:18-09:40

1 stop12h 22m

€519

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 14/7

06:30-16:30

2 stops18h 00m

Ontario

Tue 21/7

09:40-13:05

2 stops19h 25m

€548

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 15/7

08:40-23:48

2 stops23h 08m

Ontario

Wed 22/7

22:00-06:25

1 stop24h 25m

€562

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 1/7

08:40-22:41

2 stops22h 01m

Ontario

Thu 30/7

06:20-15:35

1 stop25h 15m

€563

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 15/7

09:00-22:51

2 stops21h 51m

Ontario

Wed 22/7

05:00-08:30

2 stops19h 30m

€565

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London Heathrow Airport to Ontario

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

Prices

Airlines

What is the typical price of a round-trip flight between London Heathrow Airport and Ontario?

What is the cheapest month to fly to Ontario?

If you don’t want to visit Ontario in February, then you should wait until January to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of €477.

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

You are more likely to see cheaper flights to Ontario from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around €576 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from London Heathrow Airport for as low as €428 on momondo.

When to book flights from London Heathrow Airport to Ontario

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

Estimated return price

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

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

Fastest flight time	13h 52m
Direct flights	None

The fastest flight from London Heathrow Airport to Ontario takes 13h 52m

There are no direct flights from London Heathrow Airport to Ontario. There are no popular flight routes from London Heathrow Airport to Ontario.

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Frequently asked questions about flying from London Heathrow Airport to Ontario

How far is London Heathrow to Ontario by plane?
There are 8703.4 km between London Heathrow and Ontario. Flights usually cover this in 13h 52m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from London Heathrow Airport to Ontario Airport?
Prices for flights from London Heathrow Airport to Ontario Airport are refreshed on a daily basis.
How old do you have to be to fly from London Heathrow Airport to Ontario 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 London Heathrow Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The necessary travel and health documents for your Ontario 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 licence 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.

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Ontario for you.

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

momondo does allow users to show only those flights to Ontario from London which offer a flexible booking policy as well as other useful filters and features.

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

momondo helps you find the best flight between London and Ontario by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to Ontario from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.