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

United Airlines and JetBlue 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.

€416 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.

08:40 - 22:51LHR London Heathrow-ONT Ontario

22h 11m2 stops Zurich San Francisco

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

12h 11m1 stop Denver Intl

€441United Airlines

Fri, 23 Oct - Thu, 5 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

€445United Airlines

Wed, 11 Nov - Wed, 18 Nov

07:30 - 20:31LHR London Heathrow-ONT Ontario

21h 01m2 stops Frankfurt am Main San Francisco

07:00 - 12:00ONT Ontario-LHR London Heathrow

21h 00m1 stop Chicago O'Hare Intl

€448United Airlines

Tue, 13 Oct - Fri, 13 Nov

09:00 - 20:26LHR London Heathrow-ONT Ontario

19h 26m2 stops Zurich San Francisco

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

12h 40m1 stop Denver Intl

€449United Airlines

Thu, 21 Jan - Mon, 25 Jan

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

18h 45m2 stops Frankfurt am Main San Francisco

16:17 - 21:20ONT Ontario-LHR London Heathrow

21h 03m2 stops San Francisco Newark

€450United Airlines

Wed, 4 Nov - Fri, 4 Dec

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

€451United Airlines

Mon, 26 Oct - Mon, 2 Nov

07:30 - 20:20LHR London Heathrow-ONT Ontario

20h 50m3 stops Frankfurt am Main Newark Denver Intl

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

12h 40m1 stop Denver Intl

€456United Airlines

Thu, 21 Jan - Mon, 25 Jan

07:30 - 20:20LHR London Heathrow-ONT Ontario

20h 50m3 stops Frankfurt am Main Newark Denver Intl

06:00 - 07:25ONT Ontario-LHR London Heathrow

17h 25m1 stop San Francisco

€457United Airlines

Thu, 21 Jan - Mon, 25 Jan

08:40 - 20:31LHR London Heathrow-ONT Ontario

19h 51m2 stops Zurich San Francisco

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

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

€461United Airlines

Fri, 23 Oct - Thu, 5 Nov

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

17h 45m2 stops Frankfurt am Main San Francisco

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

18h 55m2 stops Denver Intl Chicago O'Hare Intl

€471United Airlines

Thu, 29 Oct - Thu, 5 Nov

Cheap last-minute flights

Enter your travel dates to find the best prices.

10:35 - 17:51LHR London Heathrow-ONT Ontario

15h 16m1 stop San Francisco

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

12h 16m1 stop Denver Intl

€476United Airlines

Thu, 24 Sep - Thu, 1 Oct

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

14h 44m1 stop San Francisco

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

12h 18m1 stop Denver Intl

€477United Airlines

Thu, 24 Sep - Sat, 10 Oct

10:00 - 21:59LHR London Heathrow-ONT Ontario

19h 59m1 stop Houston George Bush Intcntl

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

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

€478United Airlines

Thu, 24 Sep - Wed, 7 Oct

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

15h 31m1 stop San Francisco

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

12h 18m1 stop Denver Intl

€478United Airlines

Thu, 24 Sep - Sat, 3 Oct

06:30 - 17:19LHR London Heathrow-ONT Ontario

18h 49m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

11:56 - 15:35ONT Ontario-LHR London Heathrow

19h 39m1 stop Seattle/Tacoma Intl

€480KLM

Thu, 24 Sep - Wed, 7 Oct

06:30 - 17:19LHR London Heathrow-ONT Ontario

18h 49m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

11:56 - 15:35ONT Ontario-LHR London Heathrow

19h 39m1 stop Seattle/Tacoma Intl

€489KLM

Thu, 24 Sep - Wed, 7 Oct

10:55 - 23:47LHR London Heathrow-ONT Ontario

20h 52m1 stop Salt Lake City

11:56 - 15:35ONT Ontario-LHR London Heathrow

19h 39m1 stop Seattle/Tacoma Intl

€496Virgin Atlantic

Thu, 24 Sep - Wed, 7 Oct

14:30 - 23:47LHR London Heathrow-ONT Ontario

17h 17m2 stops Los Angeles Los Angeles Salt Lake City

13:35 - 15:35ONT Ontario-LHR London Heathrow

18h 00m2 stops Salt Lake City Seattle/Tacoma Intl

€498Virgin Atlantic

Thu, 24 Sep - Wed, 7 Oct

14:30 - 23:47LHR London Heathrow-ONT Ontario

17h 17m2 stops Los Angeles Los Angeles Salt Lake City

13:35 - 15:35ONT Ontario-LHR London Heathrow

18h 00m2 stops Salt Lake City Seattle/Tacoma Intl

€498Virgin Atlantic

Thu, 24 Sep - Wed, 7 Oct

17:00 - 23:24LHR London Heathrow-ONT Ontario

14h 24m1 stop Seattle/Tacoma Intl

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

16h 52m1 stop Seattle/Tacoma Intl

€502Alaska Airlines

Thu, 24 Sep - Wed, 7 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

23 Oct

LHR08:40London Heathrow

22h 11m

2 stops

ONT22:51Ontario

5 Nov

ONT13:29Ontario

12h 11m

1 stop

LHR09:40London Heathrow

€441

United Airlines

11 Nov

LHR09:00London Heathrow

19h 15m

2 stops

ONT20:15Ontario

18 Nov

ONT06:00Ontario

17h 40m

1 stop

LHR07:40London Heathrow

€445

United Airlines

13 Oct

LHR07:30London Heathrow

21h 01m

2 stops

ONT20:31Ontario

13 Nov

ONT07:00Ontario

21h 00m

1 stop

LHR12:00London Heathrow

€448

Virgin Atlantic flights from London Heathrow Airport to Ontario

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

Virgin Atlantic

21 Oct

LHR09:55London Heathrow

22h 00m

2 stops

ONT23:55Ontario

3 Nov

ONT07:07Ontario

16h 43m

1 stop

LHR07:50London Heathrow

€480

Virgin Atlantic

24 Sept

LHR10:55London Heathrow

20h 52m

1 stop

ONT23:47Ontario

7 Oct

ONT06:20Ontario

21h 00m

1 stop

LHR11:20London Heathrow

€496

Virgin Atlantic

24 Sept

LHR14:30London Heathrow

17h 17m

2 stops

ONT23:47Ontario

7 Oct

ONT13:35Ontario

18h 00m

2 stops

LHR15:35London Heathrow

€498

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

Fri 23/10

08:40-22:51

2 stops22h 11m

Ontario

Thu 5/11

13:29-09:40

1 stop12h 11m

€441

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Wed 11/11

09:00-20:15

2 stops19h 15m

Ontario

Wed 18/11

06:00-07:40

1 stop17h 40m

€445

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Tue 13/10

07:30-20:31

2 stops21h 01m

Ontario

Fri 13/11

07:00-12:00

1 stop21h 00m

€448

Fastest return journey

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 21/1

09:00-20:26

2 stops19h 26m

Ontario

Mon 25/1

13:00-09:40

1 stop12h 40m

€449

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Wed 4/11

09:30-20:15

2 stops18h 45m

Ontario

Fri 4/12

16:17-21:20

2 stops21h 03m

€450

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 26/10

09:30-20:15

2 stops17h 45m

Ontario

Mon 2/11

05:00-05:55

2 stops16h 55m

€451

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 21/1

07:30-20:20

3 stops20h 50m

Ontario

Mon 25/1

13:00-09:40

1 stop12h 40m

€456

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 21/1

07:30-20:20

3 stops20h 50m

Ontario

Mon 25/1

06:00-07:25

1 stop17h 25m

€457

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Fri 23/10

08:40-20:31

2 stops19h 51m

Ontario

Thu 5/11

05:00-05:55

2 stops16h 55m

€461

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 29/10

09:30-20:15

2 stops17h 45m

Ontario

Thu 5/11

05:00-07:55

2 stops18h 55m

€471

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 €563 to €677.
The lowest price recently found on this route was €441.

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 €494.

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	€416
Fastest flight time	16h 24m
Direct flights	None

The best one-way flight to Ontario from London Heathrow Airport in the past 72 hours is €416. The best return flight deal from London Heathrow Airport to Ontario found on momondo in the last 72 hours is €441.

The fastest flight from London Heathrow Airport to Ontario takes 16h 24m

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 16h 24m, 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.