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

JetBlue, British Airways, and United Airlines 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.

€419 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 €654 to €477. The lowest price recently found on this route was €548.

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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.

15:00 - 23:06

LHR

ONT

15h 06m

1 stop

14:59 - 12:00

ONT

LHR

13h 01m

1 stop

€548British Airways

Wed, 28 Oct - Sat, 7 Nov

11:55 - 22:23

LHR

ONT

18h 28m

1 stop

10:47 - 08:15

ONT

LHR

13h 28m

1 stop

€567British Airways

Thu, 5 Nov - Mon, 9 Nov

17:45 - 22:45

LHR

ONT

37h 00m

1 stop

06:20 - 15:35

ONT

LHR

25h 15m

1 stop

€599KLM

Wed, 5 Aug - Thu, 13 Aug

14:25 - 21:59

LHR

ONT

15h 34m

1 stop

14:59 - 12:00

ONT

LHR

13h 01m

1 stop

€607British Airways

Mon, 2 Nov - Mon, 9 Nov

14:25 - 21:59

LHR

ONT

15h 34m

1 stop

16:47 - 13:15

ONT

LHR

12h 28m

1 stop

€608British Airways

Mon, 2 Nov - Wed, 25 Nov

14:25 - 09:34

LHR

ONT

27h 09m

1 stop

12:33 - 12:50

ONT

LHR

16h 17m

1 stop

€611British Airways

Fri, 21 Aug - Sat, 29 Aug

09:15 - 22:34

LHR

ONT

21h 19m

1 stop

05:34 - 09:00

ONT

LHR

19h 26m

1 stop

€622British Airways

Wed, 8 Jul - Mon, 13 Jul

11:00 - 18:18

LHR

ONT

15h 18m

1 stop

16:07 - 15:05

ONT

LHR

14h 58m

1 stop

€623British Airways

Mon, 3 Aug - Mon, 24 Aug

14:25 - 22:32

LHR

ONT

16h 07m

1 stop

16:07 - 15:05

ONT

LHR

14h 58m

1 stop

€623British Airways

Wed, 15 Jul - Thu, 6 Aug

11:45 - 22:41

LHR

ONT

18h 56m

2 stops

06:00 - 11:00

ONT

LHR

21h 00m

1 stop

€633Delta

Tue, 16 Jun - Tue, 30 Jun

British Airways flights from London Heathrow Airport to Ontario

Our best British Airways deals on London Heathrow Airport to Ontario flight tickets

British Airways

28 Oct

LHR15:00London Heathrow

15h 06m

1 stop

ONT23:06Ontario

7 Nov

ONT14:59Ontario

13h 01m

1 stop

LHR12:00London Heathrow

€548

British Airways

5 Nov

LHR11:55London Heathrow

18h 28m

1 stop

ONT22:23Ontario

9 Nov

ONT10:47Ontario

13h 28m

1 stop

LHR08:15London Heathrow

€567

British Airways

2 Nov

LHR14:25London Heathrow

15h 34m

1 stop

ONT21:59Ontario

9 Nov

ONT14:59Ontario

13h 01m

1 stop

LHR12:00London Heathrow

€607

Alaska Airlines flights from London Heathrow Airport to Ontario

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

Alaska Airlines

28 Oct

LHR14:45London Heathrow

15h 57m

1 stop

ONT23:42Ontario

13 Nov

ONT12:00Ontario

16h 20m

1 stop

LHR12:20London Heathrow

€656

Alaska Airlines

7 Jun

LHR17:00London Heathrow

14h 58m

1 stop

ONT23:58Ontario

21 Nov

ONT12:00Ontario

16h 20m

1 stop

LHR12:20London Heathrow

€665

Alaska Airlines

7 Jun

LHR17:00London Heathrow

14h 58m

1 stop

ONT23:58Ontario

19 Nov

ONT06:00Ontario

22h 20m

1 stop

LHR12:20London Heathrow

€667

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 28/10

15:00-23:06

1 stop15h 06m

Ontario

Sat 7/11

14:59-12:00

1 stop13h 01m

€548

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 5/11

11:55-22:23

1 stop18h 28m

Ontario

Mon 9/11

10:47-08:15

1 stop13h 28m

€567

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 5/8

17:45-22:45

1 stop37h 00m

Ontario

Thu 13/8

06:20-15:35

1 stop25h 15m

€599

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 2/11

14:25-21:59

1 stop15h 34m

Ontario

Mon 9/11

14:59-12:00

1 stop13h 01m

€607

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 2/11

14:25-21:59

1 stop15h 34m

Ontario

Wed 25/11

16:47-13:15

1 stop12h 28m

€608

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 21/8

14:25-09:34

1 stop27h 09m

Ontario

Sat 29/8

12:33-12:50

1 stop16h 17m

€611

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 8/7

09:15-22:34

1 stop21h 19m

Ontario

Mon 13/7

05:34-09:00

1 stop19h 26m

€622

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 3/8

11:00-18:18

1 stop15h 18m

Ontario

Mon 24/8

16:07-15:05

1 stop14h 58m

€623

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 15/7

14:25-22:32

1 stop16h 07m

Ontario

Thu 6/8

16:07-15:05

1 stop14h 58m

€623

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 16/6

11:45-22:41

2 stops18h 56m

Ontario

Tue 30/6

06:00-11:00

1 stop21h 00m

€633

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 €476.

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 €565 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 €427 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	14h 11m
Direct flights	None

The fastest flight from London Heathrow Airport to Ontario takes 14h 11m

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 14h 11m, 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.