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

JetBlue 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.

€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.

07:25 - 20:01LHR London Heathrow-ONT Ontario

20h 36m2 stops Munich Franz Josef Strauss San Francisco

13:35 - 07:25ONT Ontario-LHR London Heathrow

33h 50m1 stop San Francisco

€445United Airlines

Tue, 15 Sep - Mon, 30 Nov

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

17h 45m2 stops Frankfurt am Main San Francisco

13:00 - 09:40ONT Ontario-LHR London Heathrow

12h 40m1 stop Denver Intl

€446United Airlines

Mon, 26 Oct - Fri, 8 Jan

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

14h 03m1 stop Denver Intl

13:24 - 09:40ONT Ontario-LHR London Heathrow

12h 16m1 stop Denver Intl

€473United Airlines

Wed, 16 Sep - Wed, 30 Sep

06:30 - 17:12LHR London Heathrow-ONT Ontario

18h 42m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

13:15 - 10:00ONT Ontario-LHR London Heathrow

12h 45m1 stop Salt Lake City

€477Delta

Mon, 12 Oct - Mon, 9 Nov

06:15 - 20:24LHR London Heathrow-ONT Ontario

22h 09m2 stops Paris Charles de Gaulle Atlanta Hartsfield-Jackson

23:10 - 06:25ONT Ontario-LHR London Heathrow

23h 15m1 stop Atlanta Hartsfield-Jackson

€484Delta

Tue, 15 Sep - Mon, 30 Nov

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

19h 15m2 stops Zurich San Francisco

07:00 - 05:55ONT Ontario-LHR London Heathrow

14h 55m1 stop Chicago O'Hare Intl

€491United Airlines

Wed, 4 Nov - Fri, 4 Dec

11:40 - 22:43LHR London Heathrow-ONT Ontario

19h 03m1 stop Seattle/Tacoma Intl

13:15 - 10:00ONT Ontario-LHR London Heathrow

12h 45m1 stop Salt Lake City

€493Delta

Mon, 12 Oct - Mon, 9 Nov

07:25 - 17:41LHR London Heathrow-ONT Ontario

18h 16m2 stops Munich Franz Josef Strauss San Francisco

13:29 - 09:40ONT Ontario-LHR London Heathrow

13h 11m1 stop Denver Intl

€495United Airlines

Tue, 20 Oct - Sun, 25 Oct

09:30 - 20:29LHR London Heathrow-ONT Ontario

18h 59m2 stops Frankfurt am Main San Francisco

06:45 - 06:40ONT Ontario-LHR London Heathrow

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

€496United Airlines

Wed, 16 Dec - Fri, 8 Jan

09:00 - 09:38LHR London Heathrow-ONT Ontario

32h 38m2 stops Zurich San Francisco

06:00 - 06:30ONT Ontario-LHR London Heathrow

16h 30m2 stops San Francisco Toronto Pearson Intl

€497United Airlines

Tue, 1 Dec - Tue, 15 Dec

Cheap last-minute flights

Enter your travel dates to find the best prices.

17:00 - 19:03LHR London Heathrow-ONT Ontario

34h 03m1 stop Seattle/Tacoma Intl

15:14 - 15:05ONT Ontario-LHR London Heathrow

15h 51m1 stop Seattle/Tacoma Intl

€703Alaska Airlines

Tue, 1 Sep - Sat, 26 Sep

17:00 - 14:09LHR London Heathrow-ONT Ontario

29h 09m1 stop Seattle/Tacoma Intl

19:59 - 15:05ONT Ontario-LHR London Heathrow

35h 06m1 stop Seattle/Tacoma Intl

€704Alaska Airlines

Tue, 1 Sep - Fri, 11 Sep

11:15 - 19:53LHR London Heathrow-ONT Ontario

16h 38m1 stop Atlanta Hartsfield-Jackson

07:05 - 06:25ONT Ontario-LHR London Heathrow

15h 20m1 stop Atlanta Hartsfield-Jackson

€715Delta

Mon, 31 Aug - Sat, 19 Sep

17:00 - 19:03LHR London Heathrow-ONT Ontario

34h 03m1 stop Seattle/Tacoma Intl

12:12 - 15:05ONT Ontario-LHR London Heathrow

18h 53m1 stop Seattle/Tacoma Intl

€724Alaska Airlines

Tue, 1 Sep - Tue, 8 Sep

10:55 - 22:23LHR London Heathrow-ONT Ontario

19h 28m1 stop Salt Lake City

18:00 - 15:35ONT Ontario-LHR London Heathrow

13h 35m1 stop Seattle/Tacoma Intl

€725Delta

Tue, 1 Sep - Tue, 15 Sep

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

15h 01m1 stop San Francisco

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

12h 22m1 stop Denver Intl

€726United Airlines

Tue, 1 Sep - Sun, 6 Sep

13:40 - 21:59LHR London Heathrow-ONT Ontario

16h 19m1 stop Houston George Bush Intcntl

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

12h 22m1 stop Denver Intl

€727United Airlines

Mon, 31 Aug - Mon, 7 Sep

16:15 - 22:59LHR London Heathrow-ONT Ontario

14h 44m1 stop San Francisco

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

13h 14m1 stop San Francisco

€747United Airlines

Sun, 30 Aug - Tue, 8 Sep

16:15 - 22:59LHR London Heathrow-ONT Ontario

14h 44m1 stop San Francisco

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

13h 14m1 stop San Francisco

€748United Airlines

Sun, 30 Aug - Sun, 6 Sep

16:15 - 22:59LHR London Heathrow-ONT Ontario

14h 44m1 stop San Francisco

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

12h 22m1 stop Denver Intl

€749United Airlines

Fri, 28 Aug - Tue, 1 Sep

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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

19 Oct

LHR17:00London Heathrow

14h 42m

1 stop

ONT23:42Ontario

6 Jan

ONT07:00Ontario

21h 20m

1 stop

LHR12:20London Heathrow

€508

Alaska Airlines

25 Oct

LHR14:45London Heathrow

15h 57m

1 stop

ONT23:42Ontario

10 Jan

ONT11:36Ontario

16h 44m

1 stop

LHR12:20London Heathrow

€511

Alaska Airlines

27 Oct

LHR14:45London Heathrow

26h 32m

1 stop

ONT10:17Ontario

6 Jan

ONT11:36Ontario

16h 44m

1 stop

LHR12:20London Heathrow

€516

Virgin Atlantic flights from London Heathrow Airport to Ontario

Our best Virgin Atlantic deals on London Heathrow Airport to Ontario flight tickets

Virgin Atlantic

14 Oct

LHR09:55London Heathrow

20h 48m

2 stops

ONT22:43Ontario

19 Oct

ONT09:45Ontario

16h 15m

1 stop

LHR10:00London Heathrow

€554

Virgin Atlantic

18 Oct

LHR18:30London Heathrow

36h 13m

1 stop

ONT22:43Ontario

31 Oct

ONT13:35Ontario

34h 30m

2 stops

LHR07:05London Heathrow

€556

Virgin Atlantic

4 Nov

LHR12:20London Heathrow

18h 23m

1 stop

ONT22:43Ontario

25 Nov

ONT11:57Ontario

14h 43m

1 stop

LHR10:40London Heathrow

€559

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

Tue 15/9

07:25-20:01

2 stops20h 36m

Ontario

Mon 30/11

13:35-07:25

1 stop33h 50m

€445

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 26/10

09:30-20:15

2 stops17h 45m

Ontario

Fri 8/1

13:00-09:40

1 stop12h 40m

€446

Fastest return journey

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Wed 16/9

14:50-20:53

1 stop14h 03m

Ontario

Wed 30/9

13:24-09:40

1 stop12h 16m

€473

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 12/10

06:30-17:12

2 stops18h 42m

Ontario

Mon 9/11

13:15-10:00

1 stop12h 45m

€477

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Tue 15/9

06:15-20:24

2 stops22h 09m

Ontario

Mon 30/11

23:10-06:25

1 stop23h 15m

€484

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Wed 4/11

09:00-20:15

2 stops19h 15m

Ontario

Fri 4/12

07:00-05:55

1 stop14h 55m

€491

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 12/10

11:40-22:43

1 stop19h 03m

Ontario

Mon 9/11

13:15-10:00

1 stop12h 45m

€493

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Tue 20/10

07:25-17:41

2 stops18h 16m

Ontario

Sun 25/10

13:29-09:40

1 stop13h 11m

€495

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Wed 16/12

09:30-20:29

2 stops18h 59m

Ontario

Fri 8/1

06:45-06:40

2 stops15h 55m

€496

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Tue 1/12

09:00-09:38

2 stops32h 38m

Ontario

Tue 15/12

06:00-06:30

2 stops16h 30m

€497

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 €554 to €666.
The lowest price recently found on this route was €445.

What is the cheapest month to fly to Ontario?

If you don’t want to visit Ontario in January, then you should wait until February to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of €486.

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

Best price found	€409
Fastest flight time	15h 15m
Direct flights	None

The best one-way flight to Ontario from London Heathrow Airport in the past 72 hours is €409. The best return flight deal from London Heathrow Airport to Ontario found on momondo in the last 72 hours is €445.

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

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 15h 15m, 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.