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

United Airlines, British Airways, 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 €789 to €592. The lowest price recently found on this route was €483.

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Find the cheapest flights from London Heathrow Airport to Los Angeles

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

06:55 - 20:53

LHR

ONT

21h 58m

2 stops

13:56 - 11:10

ONT

LHR

13h 14m

1 stop

€483United Airlines

Fri, 4 Sep - Tue, 8 Sep

07:30 - 21:55

LHR

ONT

22h 25m

2 stops

06:00 - 07:25

ONT

LHR

17h 25m

1 stop

€484United Airlines

Wed, 8 Jul - Mon, 13 Jul

06:55 - 12:47

LHR

ONT

37h 52m

2 stops

13:18 - 12:25

ONT

LHR

15h 07m

1 stop

€485United Airlines

Wed, 8 Jul - Mon, 13 Jul

07:30 - 20:20

LHR

ONT

20h 50m

2 stops

06:00 - 07:25

ONT

LHR

17h 25m

1 stop

€486United Airlines

Fri, 13 Nov - Tue, 17 Nov

09:30 - 23:06

LHR

ONT

21h 36m

2 stops

05:00 - 09:40

ONT

LHR

20h 40m

1 stop

€487United Airlines

Fri, 20 Nov - Sat, 28 Nov

15:30 - 21:59

LHR

ONT

38h 29m

2 stops

13:52 - 07:25

ONT

LHR

33h 33m

1 stop

€501United Airlines

Fri, 2 Oct - Fri, 9 Oct

13:00 - 22:37

LHR

ONT

17h 37m

1 stop

13:18 - 09:40

ONT

LHR

12h 22m

1 stop

€511United Airlines

Wed, 1 Jul - Mon, 6 Jul

16:15 - 22:37

LHR

ONT

14h 22m

1 stop

13:18 - 12:35

ONT

LHR

15h 17m

1 stop

€513United Airlines

Tue, 30 Jun - Wed, 5 Aug

13:00 - 22:50

LHR

ONT

17h 50m

1 stop

05:00 - 08:20

ONT

LHR

19h 20m

2 stops

€514United Airlines

Sat, 27 Jun - Tue, 30 Jun

09:30 - 21:55

LHR

ONT

20h 25m

2 stops

06:00 - 06:35

ONT

LHR

16h 35m

2 stops

€519United Airlines

Thu, 9 Jul - Thu, 16 Jul

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United Airlines flights from London Heathrow Airport to Ontario

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

United Airlines

4 Sept

LHR06:55London Heathrow

21h 58m

2 stops

ONT20:53Ontario

8 Sept

ONT13:56Ontario

13h 14m

1 stop

LHR11:10London Heathrow

€483

United Airlines

8 Jul

LHR07:30London Heathrow

22h 25m

2 stops

ONT21:55Ontario

13 Jul

ONT06:00Ontario

17h 25m

1 stop

LHR07:25London Heathrow

€484

United Airlines

8 Jul

LHR06:55London Heathrow

37h 52m

2 stops

ONT12:47Ontario

13 Jul

ONT13:18Ontario

15h 07m

1 stop

LHR12:25London Heathrow

€485

Delta flights from London Heathrow Airport to Ontario

Our best Delta deals on London Heathrow Airport to Ontario flight tickets

Delta

12 Aug

LHR11:40London Heathrow

19h 05m

1 stop

ONT22:45Ontario

25 Aug

ONT18:01Ontario

13h 34m

1 stop

LHR15:35London Heathrow

€578

Delta

20 Aug

LHR17:55London Heathrow

24h 47m

2 stops

ONT10:42Ontario

30 Aug

ONT11:56Ontario

19h 39m

1 stop

LHR15:35London Heathrow

€579

Delta

7 Aug

LHR12:50London Heathrow

29h 52m

2 stops

ONT10:42Ontario

28 Aug

ONT22:00Ontario

24h 20m

2 stops

LHR06:20London Heathrow

€583

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

Fri 4/9

06:55-20:53

2 stops21h 58m

Ontario

Tue 8/9

13:56-11:10

1 stop13h 14m

€483

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 8/7

07:30-21:55

2 stops22h 25m

Ontario

Mon 13/7

06:00-07:25

1 stop17h 25m

€484

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 8/7

06:55-12:47

2 stops37h 52m

Ontario

Mon 13/7

13:18-12:25

1 stop15h 07m

€485

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

€486

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 20/11

09:30-23:06

2 stops21h 36m

Ontario

Sat 28/11

05:00-09:40

1 stop20h 40m

€487

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 2/10

15:30-21:59

2 stops38h 29m

Ontario

Fri 9/10

13:52-07:25

1 stop33h 33m

€501

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 1/7

13:00-22:37

1 stop17h 37m

Ontario

Mon 6/7

13:18-09:40

1 stop12h 22m

€511

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 30/6

16:15-22:37

1 stop14h 22m

Ontario

Wed 5/8

13:18-12:35

1 stop15h 17m

€513

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 27/6

13:00-22:50

1 stop17h 50m

Ontario

Tue 30/6

05:00-08:20

2 stops19h 20m

€514

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 9/7

09:30-21:55

2 stops20h 25m

Ontario

Thu 16/7

06:00-06:35

2 stops16h 35m

€519

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 €479.

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 €577 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 €430 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.

Search flight deals

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.