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

Alaska Airlines is the most popular carrier 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.

€409 Cheap Flights from London Heathrow Airport to Ontario in 2026

Find the cheapest flights from London Heathrow Airport to Los Angeles

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One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

09:00 - 20:15LHR London Heathrow-ONT Ontario

19h 15m2 stops Zurich San Francisco

06:00 - 11:05ONT Ontario-LHR London Heathrow

21h 05m2 stops Houston George Bush Intcntl Newark

€482United Airlines

Wed, 18 Nov - Thu, 19 Nov

08:45 - 20:01LHR London Heathrow-ONT Ontario

19h 16m2 stops Zurich San Francisco

05:00 - 07:15ONT Ontario-LHR London Heathrow

18h 15m2 stops Denver Intl Newark

€483United Airlines

Thu, 3 Sep - Wed, 16 Sep

07:25 - 18:11LHR London Heathrow-ONT Ontario

18h 46m2 stops Munich Franz Josef Strauss San Francisco

08:00 - 07:25ONT Ontario-LHR London Heathrow

15h 25m1 stop San Francisco

€486United Airlines

Sun, 6 Sep - Sat, 12 Sep

09:30 - 20:15LHR London Heathrow-ONT Ontario

18h 45m2 stops Frankfurt am Main San Francisco

06:45 - 09:10ONT Ontario-LHR London Heathrow

18h 25m2 stops Chicago O'Hare Intl Newark

€495United Airlines

Fri, 20 Nov - Sat, 5 Dec

09:00 - 20:15LHR London Heathrow-ONT Ontario

19h 15m2 stops Zurich San Francisco

06:00 - 07:40ONT Ontario-LHR London Heathrow

17h 40m1 stop Houston George Bush Intcntl

€496United Airlines

Wed, 18 Nov - Thu, 19 Nov

08:40 - 20:01LHR London Heathrow-ONT Ontario

19h 21m2 stops Zurich San Francisco

07:00 - 06:55ONT Ontario-LHR London Heathrow

15h 55m2 stops Chicago O'Hare Intl Washington, D.C. Dulles Intl

€501United Airlines

Wed, 2 Sep - Wed, 9 Sep

08:40 - 22:59LHR London Heathrow-ONT Ontario

22h 19m2 stops Zurich San Francisco

05:00 - 06:45ONT Ontario-LHR London Heathrow

17h 45m2 stops Denver Intl Chicago O'Hare Intl

€502United Airlines

Fri, 4 Sep - Mon, 7 Sep

08:40 - 20:01LHR London Heathrow-ONT Ontario

19h 21m2 stops Zurich San Francisco

09:01 - 11:10ONT Ontario-LHR London Heathrow

18h 09m1 stop San Francisco

€503United Airlines

Fri, 4 Sep - Mon, 7 Sep

07:25 - 18:11LHR London Heathrow-ONT Ontario

18h 46m2 stops Munich Franz Josef Strauss San Francisco

07:00 - 08:35ONT Ontario-LHR London Heathrow

17h 35m2 stops Chicago O'Hare Intl Ottawa

€505United Airlines

Sun, 6 Sep - Sat, 12 Sep

07:25 - 18:11LHR London Heathrow-ONT Ontario

18h 46m2 stops Munich Franz Josef Strauss San Francisco

13:18 - 12:25ONT Ontario-LHR London Heathrow

15h 07m1 stop Denver Intl

€508United Airlines

Fri, 11 Sep - Sat, 19 Sep

Cheap last-minute flights

Enter your travel dates to find the best prices.

14:50 - 20:53LHR London Heathrow-ONT Ontario

14h 03m1 stop Denver Intl

13:18 - 12:25ONT Ontario-LHR London Heathrow

15h 07m1 stop Denver Intl

€614United Airlines

Tue, 11 Aug - Fri, 28 Aug

14:50 - 20:53LHR London Heathrow-ONT Ontario

14h 03m1 stop Denver Intl

08:03 - 11:35ONT Ontario-LHR London Heathrow

19h 32m2 stops San Francisco Houston George Bush Intcntl

€624United Airlines

Tue, 11 Aug - Sat, 26 Sep

14:10 - 22:51LHR London Heathrow-ONT Ontario

16h 41m1 stop Chicago O'Hare Intl

13:18 - 09:40ONT Ontario-LHR London Heathrow

12h 22m1 stop Denver Intl

€625United Airlines

Mon, 10 Aug - Mon, 17 Aug

13:40 - 21:55LHR London Heathrow-ONT Ontario

16h 15m1 stop Houston George Bush Intcntl

13:18 - 12:25ONT Ontario-LHR London Heathrow

15h 07m1 stop Denver Intl

€636United Airlines

Mon, 10 Aug - Sat, 5 Sep

14:50 - 20:53LHR London Heathrow-ONT Ontario

14h 03m1 stop Denver Intl

13:56 - 11:10ONT Ontario-LHR London Heathrow

13h 14m1 stop San Francisco

€638United Airlines

Tue, 11 Aug - Sun, 16 Aug

13:40 - 21:55LHR London Heathrow-ONT Ontario

16h 15m1 stop Houston George Bush Intcntl

13:18 - 09:40ONT Ontario-LHR London Heathrow

12h 22m1 stop Denver Intl

€643United Airlines

Sat, 8 Aug - Sat, 29 Aug

13:00 - 20:01LHR London Heathrow-ONT Ontario

15h 01m1 stop San Francisco

13:18 - 12:35ONT Ontario-LHR London Heathrow

15h 17m1 stop Denver Intl

€645United Airlines

Tue, 11 Aug - Wed, 26 Aug

13:40 - 21:55LHR London Heathrow-ONT Ontario

16h 15m1 stop Houston George Bush Intcntl

09:01 - 07:25ONT Ontario-LHR London Heathrow

14h 24m1 stop San Francisco

€655United Airlines

Fri, 7 Aug - Mon, 17 Aug

13:40 - 21:55LHR London Heathrow-ONT Ontario

16h 15m1 stop Houston George Bush Intcntl

13:18 - 09:40ONT Ontario-LHR London Heathrow

12h 22m1 stop Denver Intl

€656United Airlines

Fri, 7 Aug - Thu, 13 Aug

10:00 - 21:55LHR London Heathrow-ONT Ontario

19h 55m1 stop Houston George Bush Intcntl

05:00 - 07:15ONT Ontario-LHR London Heathrow

18h 15m2 stops Denver Intl Newark

€657United Airlines

Fri, 7 Aug - Thu, 13 Aug

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Delta flights from London Heathrow Airport to Ontario

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

Delta

12 Dec

LHR12:20London Heathrow

18h 40m

1 stop

ONT23:00Ontario

9 Jan

ONT13:00Ontario

13h 00m

1 stop

LHR10:00London Heathrow

€534

Delta

2 Nov

LHR12:20London Heathrow

18h 23m

1 stop

ONT22:43Ontario

9 Nov

ONT11:57Ontario

14h 43m

1 stop

LHR10:40London Heathrow

€534

Delta

14 Jan

LHR10:50London Heathrow

19h 24m

1 stop

ONT22:14Ontario

21 Jan

ONT12:00Ontario

13h 00m

1 stop

LHR09:00London Heathrow

€542

United Airlines flights from London Heathrow Airport to Ontario

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

United Airlines

18 Nov

LHR09:00London Heathrow

19h 15m

2 stops

ONT20:15Ontario

19 Nov

ONT06:00Ontario

21h 05m

2 stops

LHR11:05London Heathrow

€482

United Airlines

3 Sept

LHR08:45London Heathrow

19h 16m

2 stops

ONT20:01Ontario

16 Sept

ONT05:00Ontario

18h 15m

2 stops

LHR07:15London Heathrow

€483

United Airlines

6 Sept

LHR07:25London Heathrow

18h 46m

2 stops

ONT18:11Ontario

12 Sept

ONT08:00Ontario

15h 25m

1 stop

LHR07:25London Heathrow

€486

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 London Heathrow - ONT Ontario

LHRONT

London Heathrow

Wed 18/11

09:00-20:15

2 stops19h 15m

Ontario

Thu 19/11

06:00-11:05

2 stops21h 05m

€482

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 3/9

08:45-20:01

2 stops19h 16m

Ontario

Wed 16/9

05:00-07:15

2 stops18h 15m

€483

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Sun 6/9

07:25-18:11

2 stops18h 46m

Ontario

Sat 12/9

08:00-07:25

1 stop15h 25m

€486

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Fri 20/11

09:30-20:15

2 stops18h 45m

Ontario

Sat 5/12

06:45-09:10

2 stops18h 25m

€495

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Wed 18/11

09:00-20:15

2 stops19h 15m

Ontario

Thu 19/11

06:00-07:40

1 stop17h 40m

€496

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Wed 2/9

08:40-20:01

2 stops19h 21m

Ontario

Wed 9/9

07:00-06:55

2 stops15h 55m

€501

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Fri 4/9

08:40-22:59

2 stops22h 19m

Ontario

Mon 7/9

05:00-06:45

2 stops17h 45m

€502

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Fri 4/9

08:40-20:01

2 stops19h 21m

Ontario

Mon 7/9

09:01-11:10

1 stop18h 09m

€503

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Sun 6/9

07:25-18:11

2 stops18h 46m

Ontario

Sat 12/9

07:00-08:35

2 stops17h 35m

€505

Fastest return journey

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Fri 11/9

07:25-18:11

2 stops18h 46m

Ontario

Sat 19/9

13:18-12:25

1 stop15h 07m

€508

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?

Prices are currently low for flights on this route.

Typical prices usually range from €612 to €777.
The lowest price recently found on this route was €482.

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.

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	27h 05m
Direct flights	None

The fastest flight from London Heathrow Airport to Ontario takes 27h 05m

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 27h 05m, 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.