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

United Airlines and British Airways 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.

€372 Cheap Flights from London Heathrow Airport to Ontario in 2026

1 adult

0 bags

Voted the Winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

08:30 - 22:57

LHR

ONT

22h 27m

2 stops

13:40 - 12:00

ONT

LHR

15h 20m

1 stop

€400United Airlines

Wed, 4 Mar - Wed, 11 Mar

09:30 - 21:50

LHR

ONT

20h 20m

2 stops

06:00 - 09:40

ONT

LHR

43h 40m

2 stops

€414United Airlines

Mon, 27 Apr - Sat, 9 May

10:05 - 17:41

LHR

ONT

15h 36m

1 stop

13:50 - 12:00

ONT

LHR

14h 10m

1 stop

€427United Airlines

Thu, 12 Feb - Sun, 22 Feb

10:05 - 17:41

LHR

ONT

15h 36m

1 stop

13:43 - 12:20

ONT

LHR

14h 37m

1 stop

€434United Airlines

Sun, 1 Mar - Fri, 17 Apr

14:50 - 20:36

LHR

ONT

13h 46m

1 stop

13:27 - 11:10

ONT

LHR

13h 43m

1 stop

€441United Airlines

Mon, 13 Apr - Fri, 24 Apr

14:30 - 22:34

LHR

ONT

15h 04m

1 stop

12:50 - 09:00

ONT

LHR

13h 10m

1 stop

€441Multiple Airlines

Tue, 17 Mar - Tue, 24 Mar

10:05 - 17:41

LHR

ONT

15h 36m

1 stop

13:50 - 12:00

ONT

LHR

14h 10m

1 stop

€442United Airlines

Fri, 13 Feb - Mon, 16 Feb

13:45 - 20:07

LHR

ONT

14h 22m

1 stop

13:50 - 12:00

ONT

LHR

14h 10m

1 stop

€443United Airlines

Fri, 13 Feb - Sun, 15 Feb

12:30 - 21:05

LHR

ONT

16h 35m

1 stop

13:11 - 10:00

ONT

LHR

12h 49m

1 stop

€444Delta

Fri, 6 Feb - Mon, 9 Feb

10:45 - 21:44

LHR

ONT

18h 59m

1 stop

13:10 - 10:00

ONT

LHR

12h 50m

1 stop

€446Delta

Sat, 14 Feb - Fri, 20 Feb

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 Mar

LHR08:30London Heathrow

22h 27m

2 stops

ONT22:57Ontario

11 Mar

ONT13:40Ontario

15h 20m

1 stop

LHR12:00London Heathrow

€400

United Airlines

27 Apr

LHR09:30London Heathrow

20h 20m

2 stops

ONT21:50Ontario

9 May

ONT06:00Ontario

43h 40m

2 stops

LHR09:40London Heathrow

€414

United Airlines

25 Jan

LHR11:35London Heathrow

17h 23m

1 stop

ONT20:58Ontario

7 Feb

ONT13:24Ontario

12h 16m

1 stop

LHR09:40London Heathrow

€426

KLM flights from London Heathrow Airport to Ontario

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

KLM

1 Apr

LHR10:55London Heathrow

13h 33m

1 stop

ONT16:28Ontario

15 Apr

ONT13:20Ontario

12h 40m

1 stop

LHR10:00London Heathrow

€464

KLM

23 Mar

LHR14:30London Heathrow

15h 04m

1 stop

ONT22:34Ontario

8 Apr

ONT13:20Ontario

12h 40m

1 stop

LHR10:00London Heathrow

€545

KLM

16 Jul

LHR10:55London Heathrow

13h 19m

1 stop

ONT16:14Ontario

25 Jul

ONT13:00Ontario

13h 00m

1 stop

LHR10:00London Heathrow

€554

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

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 4/3

08:30-22:57

2 stops22h 27m

Ontario

Wed 11/3

13:40-12:00

1 stop15h 20m

€400

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 27/4

09:30-21:50

2 stops20h 20m

Ontario

Sat 9/5

06:00-09:40

2 stops43h 40m

€414

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 12/2

10:05-17:41

1 stop15h 36m

Ontario

Sun 22/2

13:50-12:00

1 stop14h 10m

€427

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 1/3

10:05-17:41

1 stop15h 36m

Ontario

Fri 17/4

13:43-12:20

1 stop14h 37m

€434

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 13/4

14:50-20:36

1 stop13h 46m

Ontario

Fri 24/4

13:27-11:10

1 stop13h 43m

€441

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 17/3

14:30-22:34

1 stop15h 04m

Ontario

Tue 24/3

12:50-09:00

1 stop13h 10m

€441

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 13/2

10:05-17:41

1 stop15h 36m

Ontario

Mon 16/2

13:50-12:00

1 stop14h 10m

€442

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 13/2

13:45-20:07

1 stop14h 22m

Ontario

Sun 15/2

13:50-12:00

1 stop14h 10m

€443

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 6/2

12:30-21:05

1 stop16h 35m

Ontario

Mon 9/2

13:11-10:00

1 stop12h 49m

€444

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 14/2

10:45-21:44

1 stop18h 59m

Ontario

Fri 20/2

13:10-10:00

1 stop12h 50m

€446

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 cheapest month to fly to Ontario?

If you don’t want to visit Ontario in January, then you should wait until September to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of €493.

How far in advance should I book a flight 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 €587 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 €454 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	15h 53m
Direct flights	None

The fastest flight from London Heathrow Airport to Ontario takes 15h 53m

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

How far is London Heathrow to Ontario by plane?
There are 8703.4 km between London Heathrow and Ontario. Flights usually cover this in 15h 53m, 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.