Which stopover airport has the shortest travel time from London Heathrow Airport to Ontario?

Flights connecting via Phoenix (PHX) have the shortest average one-way travel time: 14h 17m.

Which stopover airport offers the lowest fares from London Heathrow Airport to Ontario?

Flights via Seattle (SEA) offer the lowest average return price of £521.

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

Alaska Airlines, United Airlines, and JetBlue are the most popular carriers operating from London Heathrow to Ontario

Which airport is the most popular for stopovers for flights between London Heathrow Airport and Ontario?

Phoenix (PHX) was the most common stop: 67% of momondo users choosing one-stop flights on this route connected there.

Which stopover airport has the shortest connection time from London Heathrow Airport to Ontario?

Phoenix (PHX) has the shortest average stopover time for this route: 2h 17m.

Which airlines fly to Ontario?

Virgin Atlantic, British Airways and Lufthansa are the top three most popular airlines that fly to Ontario from London Heathrow Airport according to our data. Virgin Atlantic is the first choice among our users, with 44% of people opting to fly with this airline when travelling to Ontario. Keep in mind that there are 20 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

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 were last updated today.

How many operators does momondo search for flights from London Heathrow Airport to Ontario Airport?

The number of operators available for flights from London Heathrow Airport to Ontario Airport is 3 as of August 2026.

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 travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

£331 Cheap Flights from London Heathrow Airport to Ontario in 2026

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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

13:33 - 11:15ONT Ontario-LHR London Heathrow

13h 42m1 stop San Francisco

£412United Airlines

Wed, 4 Nov - Fri, 4 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

£412Lufthansa

Wed, 18 Nov - Thu, 19 Nov

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

£413United Airlines

Wed, 18 Nov - Thu, 19 Nov

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

22h 19m2 stops Zurich San Francisco

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

12h 22m1 stop Denver Intl

£413United Airlines

Fri, 4 Sep - Mon, 7 Sep

20:25 - 16:30LHR London Heathrow-ONT Ontario

28h 05m2 stops Amsterdam Schiphol Salt Lake City

12:22 - 09:50ONT Ontario-LHR London Heathrow

37h 28m2 stops Atlanta Hartsfield-Jackson Orlando

£420Virgin Atlantic

Fri, 4 Dec - Tue, 8 Dec

20:25 - 22:08LHR London Heathrow-ONT Ontario

33h 43m2 stops Amsterdam Schiphol Salt Lake City

06:00 - 10:00ONT Ontario-LHR London Heathrow

20h 00m1 stop Salt Lake City

£420Virgin Atlantic

Fri, 4 Dec - Tue, 8 Dec

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

16h 19m1 stop Houston George Bush Intcntl

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

13h 11m1 stop Denver Intl

£433Lufthansa

Sat, 24 Oct - Fri, 30 Oct

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

16h 19m1 stop Houston George Bush Intcntl

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

13h 11m1 stop Denver Intl

£433Lufthansa

Sun, 11 Oct - Thu, 29 Oct

11:15 - 18:45LHR London Heathrow-ONT Ontario

15h 30m1 stop Dallas/Fort Worth

14:47 - 12:00ONT Ontario-LHR London Heathrow

13h 13m1 stop Dallas/Fort Worth

£451British Airways

Fri, 5 Feb - Fri, 26 Feb

16:25 - 09:34LHR London Heathrow-ONT Ontario

25h 09m1 stop Dallas/Fort Worth

10:25 - 12:50ONT Ontario-LHR London Heathrow

18h 25m1 stop Dallas/Fort Worth

£470British Airways

Mon, 7 Sep - Sun, 20 Sep

Cheap last-minute flights

Enter your travel dates to find the best prices.

10:00 - 18:12LHR London Heathrow-ONT Ontario

16h 12m1 stop Houston George Bush Intcntl

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

12h 22m1 stop Denver Intl

£503Lufthansa

Sat, 15 Aug - Sat, 22 Aug

11:25 - 20:53LHR London Heathrow-ONT Ontario

17h 28m1 stop Denver Intl

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

12h 22m1 stop Denver Intl

£509Lufthansa

Fri, 14 Aug - Mon, 31 Aug

10:00 - 18:12LHR London Heathrow-ONT Ontario

16h 12m1 stop Houston George Bush Intcntl

06:00 - 11:35ONT Ontario-LHR London Heathrow

21h 35m1 stop Houston George Bush Intcntl

£509Lufthansa

Sat, 15 Aug - Fri, 28 Aug

14:10 - 22:35LHR London Heathrow-ONT Ontario

16h 25m1 stop Chicago O'Hare Intl

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

15h 07m1 stop Denver Intl

£510United Airlines

Fri, 14 Aug - Mon, 17 Aug

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

15h 01m1 stop San Francisco

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

14h 24m1 stop San Francisco

£510United Airlines

Fri, 14 Aug - Fri, 21 Aug

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

£510United Airlines

Fri, 14 Aug - Sun, 30 Aug

11:40 - 22:45LHR London Heathrow-ONT Ontario

19h 05m1 stop Seattle/Tacoma Intl

13:06 - 10:00ONT Ontario-LHR London Heathrow

12h 54m1 stop Salt Lake City

£530Virgin Atlantic

Fri, 14 Aug - Fri, 21 Aug

11:40 - 22:45LHR London Heathrow-ONT Ontario

19h 05m1 stop Seattle/Tacoma Intl

13:06 - 10:00ONT Ontario-LHR London Heathrow

12h 54m1 stop Salt Lake City

£531Virgin Atlantic

Fri, 14 Aug - Fri, 21 Aug

16:25 - 09:34LHR London Heathrow-ONT Ontario

25h 09m1 stop Dallas/Fort Worth

14:43 - 09:00ONT Ontario-LHR London Heathrow

34h 17m1 stop Dallas/Fort Worth

£620British Airways

Tue, 11 Aug - Sat, 15 Aug

09:15 - 22:59LHR London Heathrow-ONT Ontario

21h 44m2 stops Madrid Barajas Dallas/Fort Worth

10:29 - 09:00ONT Ontario-LHR London Heathrow

14h 31m1 stop Dallas/Fort Worth

£917British Airways

Thu, 13 Aug - Mon, 31 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

23 Nov

LHR06:30London Heathrow

18h 43m

2 stops

ONT17:13Ontario

7 Dec

ONT11:57Ontario

14h 43m

1 stop

LHR10:40London Heathrow

£444

Delta

25 Sept

LHR09:55London Heathrow

21h 52m

2 stops

ONT23:47Ontario

2 Oct

ONT11:54Ontario

19h 41m

1 stop

LHR15:35London Heathrow

£447

Delta

7 Sept

LHR06:15London Heathrow

20h 15m

2 stops

ONT18:30Ontario

14 Sept

ONT13:04Ontario

16h 01m

2 stops

LHR13:05London Heathrow

£452

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 Nov

LHR09:00London Heathrow

19h 15m

2 stops

ONT20:15Ontario

4 Dec

ONT13:33Ontario

13h 42m

1 stop

LHR11:15London Heathrow

£412

United Airlines

18 Nov

LHR09:00London Heathrow

19h 15m

2 stops

ONT20:15Ontario

19 Nov

ONT13:29Ontario

23h 51m

2 stops

LHR21:20London Heathrow

£413

United Airlines

18 Nov

LHR09:00London Heathrow

19h 15m

2 stops

ONT20:15Ontario

19 Nov

ONT06:00Ontario

31h 20m

2 stops

LHR21:20London Heathrow

£414

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 4/11

09:00-20:15

2 stops19h 15m

Ontario

Fri 4/12

13:33-11:15

1 stop13h 42m

£412

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

£412

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

£413

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Fri 4/9

08:40-22:59

2 stops22h 19m

Ontario

Mon 7/9

13:18-09:40

1 stop12h 22m

£413

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Fri 4/12

20:25-16:30

2 stops28h 05m

Ontario

Tue 8/12

12:22-09:50

2 stops37h 28m

£420

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Fri 4/12

20:25-22:08

2 stops33h 43m

Ontario

Tue 8/12

06:00-10:00

1 stop20h 00m

£420

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Sat 24/10

13:40-21:59

1 stop16h 19m

Ontario

Fri 30/10

13:29-09:40

1 stop13h 11m

£433

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Sun 11/10

13:40-21:59

1 stop16h 19m

Ontario

Thu 29/10

13:29-09:40

1 stop13h 11m

£433

Fastest return journey

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Fri 5/2

11:15-18:45

1 stop15h 30m

Ontario

Fri 26/2

14:47-12:00

1 stop13h 13m

£451

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 7/9

16:25-09:34

1 stop25h 09m

Ontario

Sun 20/9

10:25-12:50

1 stop18h 25m

£470

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

Stopovers

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 £524 to £671.
The lowest price recently found on this route was £412.

What is the cheapest month to fly to Ontario?

The month of January is, on average, the cheapest month to fly to Ontario from London Heathrow Airport, with most prices found around £410. If you’re not able to fly to Ontario in January, then February is your next best option. Flight prices from London Heathrow Airport to Ontario during February average around £420.

Can stopping save me money on London Heathrow Airport to Ontario flights?

You could potentially save up to 51% on your flight if you consider stops on a London Heathrow Airport to Ontario flight.

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 27m
Direct flights	None

The fastest flight from London Heathrow Airport to Ontario takes 13h 27m

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?
Ontario is 5408.1 mi away from London Heathrow. By plane, this route typically takes 13h 27m.
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 were last updated today.
How many operators does momondo search for flights from London Heathrow Airport to Ontario Airport?
The number of operators available for flights from London Heathrow Airport to Ontario Airport is 3 as of August 2026.
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 travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from London Heathrow Airport to Ontario?
momondo data reveals that the most frequently booked airline on the route from London Heathrow Airport to Ontario is British Airways, representing 55% of all bookings. The subsequent popular airlines are Virgin Atlantic at 29% and United Airlines at 16%.

Best airlines flying from London Heathrow Airport to Ontario

Compare and see reviews for airlines that fly from London Heathrow Airport to Ontario with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom £367	Free Cancellation	Rating 7.4 10,101 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom £371	Free Cancellation	Rating 7.5 694 reviews	Search Virgin Atlantic flights
British Airways	PriceFrom £398	Free Cancellation	Rating 6.7 8,155 reviews	Search British Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from London to Ontario?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from London.

Can I find flights from London to Ontario with flexible booking policies on momondo?

Flights from London to Ontario with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from London to Ontario?

Once you have performed a search for London to Ontario flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from London to Ontario right now. Can momondo alert me if prices change?

Price alerts on flights to Ontario from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.