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.

€412 Cheap Flights from London Heathrow Airport to Ontario in 2026/27

Find the cheapest flights from London Heathrow Airport to Los Angeles

Return

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 - 08:25ONT Ontario-LHR London Heathrow

18h 25m2 stops Houston George Bush Intcntl Newark

€443United Airlines

Wed, 11 Nov - Wed, 18 Nov

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

17h 45m2 stops Frankfurt am Main San Francisco

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

16h 55m2 stops Denver Intl Chicago O'Hare Intl

€450United Airlines

Tue, 27 Oct - Tue, 3 Nov

09:30 - 21:11LHR London Heathrow-ONT Ontario

43h 41m2 stops Frankfurt am Main Denver Intl

05:00 - 09:40ONT Ontario-LHR London Heathrow

20h 40m1 stop Denver Intl

€475United Airlines

Tue, 1 Dec - Tue, 8 Dec

09:30 - 21:11LHR London Heathrow-ONT Ontario

43h 41m2 stops Frankfurt am Main Denver Intl

05:00 - 09:40ONT Ontario-LHR London Heathrow

20h 40m1 stop Denver Intl

€476United Airlines

Tue, 1 Dec - Tue, 8 Dec

13:00 - 20:31LHR London Heathrow-ONT Ontario

15h 31m1 stop San Francisco

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

12h 00m1 stop Denver Intl

€478United Airlines

Tue, 13 Oct - Wed, 2 Dec

10:05 - 18:01LHR London Heathrow-ONT Ontario

14h 56m1 stop San Francisco

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

14h 00m1 stop San Francisco

€479United Airlines

Tue, 27 Oct - Sat, 28 Nov

09:30 - 21:11LHR London Heathrow-ONT Ontario

43h 41m2 stops Frankfurt am Main Denver Intl

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

16h 55m2 stops Denver Intl Chicago O'Hare Intl

€480United Airlines

Tue, 1 Dec - Tue, 8 Dec

10:25 - 18:44LHR London Heathrow-ONT Ontario

16h 19m1 stop Chicago O'Hare Intl

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

14h 55m1 stop Chicago O'Hare Intl

€485United Airlines

Tue, 1 Dec - Tue, 8 Dec

10:25 - 18:44LHR London Heathrow-ONT Ontario

16h 19m1 stop Chicago O'Hare Intl

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

14h 55m1 stop Chicago O'Hare Intl

€486United Airlines

Tue, 1 Dec - Tue, 8 Dec

13:45 - 20:30LHR London Heathrow-ONT Ontario

14h 45m1 stop San Francisco

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

15h 25m1 stop San Francisco

€490United Airlines

Thu, 18 Feb - Mon, 22 Feb

Cheap last-minute flights

Enter your travel dates to find the best prices.

14:50 - 20:58LHR London Heathrow-ONT Ontario

14h 08m1 stop Denver Intl

11:10 - 14:10ONT Ontario-LHR London Heathrow

19h 00m1 stop San Francisco

€477United Airlines

Thu, 8 Oct - Wed, 21 Oct

11:25 - 20:58LHR London Heathrow-ONT Ontario

17h 33m1 stop Denver Intl

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

12h 16m1 stop Denver Intl

€478United Airlines

Thu, 8 Oct - Wed, 21 Oct

10:35 - 17:41LHR London Heathrow-ONT Ontario

15h 06m1 stop San Francisco

13:52 - 11:10ONT Ontario-LHR London Heathrow

13h 18m1 stop San Francisco

€479United Airlines

Tue, 6 Oct - Tue, 13 Oct

11:25 - 20:58LHR London Heathrow-ONT Ontario

17h 33m1 stop Denver Intl

13:22 - 09:40ONT Ontario-LHR London Heathrow

12h 18m1 stop Denver Intl

€480United Airlines

Sun, 4 Oct - Sat, 17 Oct

13:05 - 22:51LHR London Heathrow-ONT Ontario

17h 46m2 stops Los Angeles San Francisco

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

12h 16m1 stop Denver Intl

€489United Airlines

Mon, 5 Oct - Sun, 18 Oct

06:30 - 22:43LHR London Heathrow-ONT Ontario

24h 13m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

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

20h 00m1 stop Salt Lake City

€494Delta

Thu, 8 Oct - Wed, 21 Oct

11:45 - 22:43LHR London Heathrow-ONT Ontario

18h 58m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

09:45 - 12:05ONT Ontario-LHR London Heathrow

18h 20m2 stops Salt Lake City New York John F Kennedy Intl

€495Delta

Thu, 8 Oct - Wed, 21 Oct

17:00 - 23:42LHR London Heathrow-ONT Ontario

14h 42m1 stop Seattle/Tacoma Intl

14:13 - 15:05ONT Ontario-LHR London Heathrow

16h 52m1 stop Seattle/Tacoma Intl

€511Alaska Airlines

Mon, 5 Oct - Wed, 21 Oct

17:00 - 10:17LHR London Heathrow-ONT Ontario

25h 17m1 stop Seattle/Tacoma Intl

14:13 - 12:20ONT Ontario-LHR London Heathrow

15h 07m1 stop Seattle/Tacoma Intl

€520Alaska Airlines

Tue, 6 Oct - Fri, 30 Oct

17:00 - 10:17LHR London Heathrow-ONT Ontario

25h 17m1 stop Seattle/Tacoma Intl

14:13 - 15:05ONT Ontario-LHR London Heathrow

16h 52m1 stop Seattle/Tacoma Intl

€521Alaska Airlines

Wed, 7 Oct - Wed, 14 Oct

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

United Airlines flights from London Heathrow Airport to Ontario

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

United Airlines

11 Nov

LHR09:00London Heathrow

19h 15m

2 stops

ONT20:15Ontario

18 Nov

ONT06:00Ontario

18h 25m

2 stops

LHR08:25London Heathrow

€443

United Airlines

27 Oct

LHR09:30London Heathrow

17h 45m

2 stops

ONT20:15Ontario

3 Nov

ONT05:00Ontario

16h 55m

2 stops

LHR05:55London Heathrow

€450

United Airlines

1 Dec

LHR09:30London Heathrow

43h 41m

2 stops

ONT21:11Ontario

8 Dec

ONT05:00Ontario

20h 40m

1 stop

LHR09:40London Heathrow

€475

British Airways flights from London Heathrow Airport to Ontario

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

British Airways

31 Oct

LHR10:05London Heathrow

15h 39m

1 stop

ONT18:44Ontario

9 Nov

ONT16:51Ontario

12h 44m

1 stop

LHR13:35London Heathrow

€560

British Airways

15 Oct

LHR10:05London Heathrow

13h 11m

1 stop

ONT15:16Ontario

22 Oct

ONT13:05Ontario

13h 25m

1 stop

LHR10:30London Heathrow

€581

British Airways

15 Oct

LHR10:05London Heathrow

13h 11m

1 stop

ONT15:16Ontario

6 Nov

ONT16:51Ontario

12h 44m

1 stop

LHR13:35London Heathrow

€641

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 11/11

09:00-20:15

2 stops19h 15m

Ontario

Wed 18/11

06:00-08:25

2 stops18h 25m

€443

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Tue 27/10

09:30-20:15

2 stops17h 45m

Ontario

Tue 3/11

05:00-05:55

2 stops16h 55m

€450

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Tue 1/12

09:30-21:11

2 stops43h 41m

Ontario

Tue 8/12

05:00-09:40

1 stop20h 40m

€475

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Tue 1/12

09:30-21:11

2 stops43h 41m

Ontario

Tue 8/12

05:00-09:40

1 stop20h 40m

€476

Fastest return journey

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Tue 13/10

13:00-20:31

1 stop15h 31m

Ontario

Wed 2/12

13:40-09:40

1 stop12h 00m

€478

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Tue 27/10

10:05-18:01

1 stop14h 56m

Ontario

Sat 28/11

09:25-07:25

1 stop14h 00m

€479

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Tue 1/12

09:30-21:11

2 stops43h 41m

Ontario

Tue 8/12

05:00-05:55

2 stops16h 55m

€480

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Tue 1/12

10:25-18:44

1 stop16h 19m

Ontario

Tue 8/12

07:00-05:55

1 stop14h 55m

€485

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Tue 1/12

10:25-18:44

1 stop16h 19m

Ontario

Tue 8/12

07:00-05:55

1 stop14h 55m

€486

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 18/2

13:45-20:30

1 stop14h 45m

Ontario

Mon 22/2

08:00-07:25

1 stop15h 25m

€490

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 €545 to €586.
The lowest price recently found on this route was €443.

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 €503.

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	€412
Fastest flight time	14h 44m
Direct flights	None

The best one-way flight to Ontario from London Heathrow Airport in the past 72 hours is €412. The best return flight deal from London Heathrow Airport to Ontario found on momondo in the last 72 hours is €443.

The fastest flight from London Heathrow Airport to Ontario takes 14h 44m

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 44m, 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.