Which airlines fly to Ontario?

British Airways, Virgin Atlantic and Aer Lingus are the top three most popular airlines that fly to Ontario from United Kingdom according to our data. British Airways is the first choice among our users, with 47% 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.

What is the cheapest airline that flies from United Kingdom to Ontario?

Alaska Airlines, Virgin Atlantic, and United Airlines are the most popular carriers operating from United Kingdom to Ontario

How long does it take to fly to Ontario?

On average, it takes 12h 52m to fly from United Kingdom to Ontario if you fly out of London (the most popular airport in United Kingdom) and into Los Angeles (the most popular airport in Ontario). If you’re flying out of Manchester and into Los Angeles, then the flight time is around 13h 35m.

When did momondo last update prices for flights from United Kingdom to Ontario Airport?

Prices for flights from United Kingdom to Ontario Airport are refreshed on a daily basis.

How many operators does momondo search for flights from United Kingdom to Ontario Airport?

There are 4 operators available for flights from United Kingdom to Ontario Airport as of September 2026.

How old do you have to be to fly from United Kingdom to Ontario Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United Kingdom 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 license 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.

£336 Cheap Flights from the United Kingdom to Ontario in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from the United Kingdom to Los Angeles

Return

One-way

Last minute

Recent return flight deals from the United Kingdom to Los Angeles

Enter your travel dates to find the best prices.

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

19h 15m2 stops Zurich San Francisco

18:37 - 21:20ONT Ontario-LHR London Heathrow

18h 43m2 stops San Francisco Newark

£377United Airlines

Mon, 9 Nov - Mon, 16 Nov

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

19h 15m2 stops Zurich San Francisco

06:00 - 11:15ONT Ontario-LHR London Heathrow

21h 15m1 stop San Francisco

£377United Airlines

Mon, 9 Nov - Mon, 16 Nov

15:45 - 22:43LHR London Heathrow-ONT Ontario

38h 58m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

13:15 - 06:20ONT Ontario-LHR London Heathrow

33h 05m2 stops Salt Lake City New York John F Kennedy Intl

£399Virgin Atlantic

Fri, 6 Nov - Fri, 13 Nov

12:20 - 22:43LHR London Heathrow-ONT Ontario

18h 23m1 stop Seattle/Tacoma Intl

07:07 - 07:50ONT Ontario-LHR London Heathrow

16h 43m1 stop Atlanta Hartsfield-Jackson

£403Virgin Atlantic

Wed, 4 Nov - Sun, 8 Nov

07:30 - 21:40LHR London Heathrow-ONT Ontario

22h 10m2 stops Frankfurt am Main Houston George Bush Intcntl

05:00 - 11:50ONT Ontario-LHR London Heathrow

22h 50m2 stops Denver Intl Vancouver Intl

£407Multiple Airlines

Thu, 19 Nov - Thu, 26 Nov

14:30 - 20:15LHR London Heathrow-ONT Ontario

37h 45m2 stops Vancouver Intl San Francisco

13:40 - 07:10ONT Ontario-LHR London Heathrow

33h 30m2 stops Denver Intl Montreal Pierre Elliott Trudeau Intl

£414Air Canada

Thu, 26 Nov - Sat, 12 Dec

14:45 - 23:31LHR London Heathrow-ONT Ontario

16h 46m1 stop Seattle/Tacoma Intl

17:01 - 12:20ONT Ontario-LHR London Heathrow

35h 19m1 stop Seattle/Tacoma Intl

£423Alaska Airlines

Mon, 23 Nov - Mon, 7 Dec

14:45 - 23:31LHR London Heathrow-ONT Ontario

16h 46m1 stop Seattle/Tacoma Intl

11:57 - 12:20ONT Ontario-LHR London Heathrow

16h 23m1 stop Seattle/Tacoma Intl

£423Alaska Airlines

Mon, 23 Nov - Wed, 9 Dec

14:35 - 22:08LHR London Heathrow-ONT Ontario

15h 33m1 stop Phoenix Sky Harbor Intl

17:02 - 13:35ONT Ontario-LHR London Heathrow

12h 33m1 stop Phoenix Sky Harbor Intl

£487British Airways

Mon, 1 Mar - Mon, 8 Mar

11:15 - 18:51LHR London Heathrow-ONT Ontario

15h 36m1 stop Dallas/Fort Worth

16:59 - 13:35ONT Ontario-LHR London Heathrow

12h 36m1 stop Phoenix Sky Harbor Intl

£488British Airways

Mon, 8 Feb - Mon, 22 Feb

Recent last minute flight deals from the United Kingdom to Los Angeles

Enter your travel dates to find the best prices.

17:45 - 16:35LHR London Heathrow-ONT Ontario

30h 50m2 stops Seattle/Tacoma Intl Salt Lake City

11:56 - 11:20ONT Ontario-LHR London Heathrow

15h 24m1 stop Seattle/Tacoma Intl

£396Delta

Fri, 2 Oct - Fri, 9 Oct

11:15 - 22:24LHR London Heathrow-ONT Ontario

19h 09m1 stop Atlanta Hartsfield-Jackson

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

19h 39m1 stop Seattle/Tacoma Intl

£400Delta

Fri, 2 Oct - Fri, 9 Oct

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

15h 31m1 stop San Francisco

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

12h 16m1 stop Denver Intl

£406United Airlines

Fri, 2 Oct - Thu, 15 Oct

10:35 - 17:46LHR London Heathrow-ONT Ontario

15h 11m1 stop San Francisco

16:03 - 14:10ONT Ontario-LHR London Heathrow

14h 07m1 stop San Francisco

£406United Airlines

Sat, 3 Oct - Sat, 17 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

£423Alaska Airlines

Thu, 1 Oct - Wed, 14 Oct

17:45 - 22:40LHR London Heathrow-ONT Ontario

36h 55m1 stop Seattle/Tacoma Intl

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

13h 35m1 stop Seattle/Tacoma Intl

£424Virgin Atlantic

Fri, 2 Oct - Thu, 15 Oct

17:00 - 11:16LHR London Heathrow-ONT Ontario

26h 16m1 stop Seattle/Tacoma Intl

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

16h 52m1 stop Seattle/Tacoma Intl

£424Alaska Airlines

Thu, 1 Oct - Wed, 14 Oct

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

19h 00m1 stop Seattle/Tacoma Intl

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

13h 35m1 stop Seattle/Tacoma Intl

£425Virgin Atlantic

Thu, 1 Oct - Wed, 14 Oct

14:45 - 09:29LHR London Heathrow-ONT Ontario

26h 44m1 stop Dallas/Fort Worth

07:00 - 09:25ONT Ontario-LHR London Heathrow

18h 25m1 stop Dallas/Fort Worth

£478British Airways

Fri, 2 Oct - Thu, 15 Oct

16:25 - 23:36LHR London Heathrow-ONT Ontario

15h 11m1 stop Dallas/Fort Worth

14:22 - 12:50ONT Ontario-LHR London Heathrow

14h 28m1 stop Dallas/Fort Worth

£512British Airways

Thu, 1 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

Virgin Atlantic flights from United Kingdom to Ontario

Our best Virgin Atlantic deals on United Kingdom to Ontario flight tickets

Virgin Atlantic

6 Nov

LHR15:45London Heathrow

38h 58m

2 stops

ONT22:43Ontario

13 Nov

ONT13:15Ontario

33h 05m

2 stops

LHR06:20London Heathrow

£399

Virgin Atlantic

4 Nov

LHR12:20London Heathrow

18h 23m

1 stop

ONT22:43Ontario

8 Nov

ONT07:07Ontario

16h 43m

1 stop

LHR07:50London Heathrow

£403

Virgin Atlantic

26 Oct

LHR12:20London Heathrow

17h 23m

1 stop

ONT22:43Ontario

2 Nov

ONT12:16Ontario

34h 09m

1 stop

LHR06:25London Heathrow

£404

American Airlines flights from United Kingdom to Ontario

Our best American Airlines deals on United Kingdom to Ontario flight tickets

American Airlines

1 Oct

MAN10:50Manchester

20h 46m

2 stops

ONT23:36Ontario

14 Nov

ONT07:00Ontario

20h 50m

2 stops

MAN11:50Manchester

£586

American Airlines

7 Oct

GLA13:20Glasgow Intl

18h 32m

2 stops

ONT23:52Ontario

24 Oct

ONT10:25Ontario

17h 25m

2 stops

GLA11:50Glasgow Intl

£615

American Airlines

24 Dec

MAN11:50Manchester

18h 07m

2 stops

ONT21:57Ontario

6 Jan

ONT16:19Ontario

16h 01m

2 stops

MAN16:20Manchester

£620

momondo Fare Finder

Use the filters below to find and compare flights from the United Kingdom 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

Mon 9/11

09:00-20:15

2 stops19h 15m

Ontario

Mon 16/11

18:37-21:20

2 stops18h 43m

£377

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 9/11

09:00-20:15

2 stops19h 15m

Ontario

Mon 16/11

06:00-11:15

1 stop21h 15m

£377

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Fri 6/11

15:45-22:43

2 stops38h 58m

Ontario

Fri 13/11

13:15-06:20

2 stops33h 05m

£399

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Wed 4/11

12:20-22:43

1 stop18h 23m

Ontario

Sun 8/11

07:07-07:50

1 stop16h 43m

£403

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 19/11

07:30-21:40

2 stops22h 10m

Ontario

Thu 26/11

05:00-11:50

2 stops22h 50m

£407

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 26/11

14:30-20:15

2 stops37h 45m

Ontario

Sat 12/12

13:40-07:10

2 stops33h 30m

£414

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 23/11

14:45-23:31

1 stop16h 46m

Ontario

Mon 7/12

17:01-12:20

1 stop35h 19m

£423

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 23/11

14:45-23:31

1 stop16h 46m

Ontario

Wed 9/12

11:57-12:20

1 stop16h 23m

£423

Fastest return journey

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 1/3

14:35-22:08

1 stop15h 33m

Ontario

Mon 8/3

17:02-13:35

1 stop12h 33m

£487

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 8/2

11:15-18:51

1 stop15h 36m

Ontario

Mon 22/2

16:59-13:35

1 stop12h 36m

£488

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 United Kingdom 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

Other information

What is the cheapest month to fly to Ontario?

The month of January is, on average, the cheapest month to fly to Ontario from United Kingdom, with most prices found around £417. If you’re not able to fly to Ontario in January, then February is your next best option. Flight prices from United Kingdom to Ontario during February average around £440.

Can stopping save me money on United Kingdom to Ontario flights?

You could potentially save up to 47% on your flight if you consider stops on a United Kingdom to Ontario flight.

Cheap United Kingdom to Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United Kingdom to Ontario

Best price found	£336
Fastest flight time	14h 08m
Direct flights	None

The best one-way flight to Ontario from United Kingdom in the past 72 hours is £336. The best return flight deal from United Kingdom to Ontario found on momondo in the last 72 hours is £377.

The fastest flight from United Kingdom to Ontario takes 14h 08m

There are no direct flights from United Kingdom to Ontario. There are no popular flight routes from United Kingdom to Ontario.

Search flight deals

Frequently asked questions about flying from the United Kingdom to Ontario

When did momondo last update prices for flights from United Kingdom to Ontario Airport?
Prices for flights from United Kingdom to Ontario Airport are refreshed on a daily basis.
How many operators does momondo search for flights from United Kingdom to Ontario Airport?
There are 4 operators available for flights from United Kingdom to Ontario Airport as of September 2026.
How old do you have to be to fly from United Kingdom to Ontario Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United Kingdom 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 license 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.

Best airlines flying from United Kingdom to Ontario

Compare and see reviews for airlines that fly from United Kingdom to Ontario with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom £377	Free Cancellation	Rating 7.4 10,247 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom £379	Free Cancellation	Rating 7.4 694 reviews	Search Virgin Atlantic flights
British Airways	PriceFrom £393	Free Cancellation	Rating 6.7 8,238 reviews	Search British Airways flights
Alaska Airlines	PriceFrom £431	Free Cancellation	Rating 7.9 12,981 reviews	Search Alaska Airlines flights

Why use momondo?

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

It is quick and easy to find United Kingdom to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.

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

Flights from United Kingdom 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 United Kingdom to Ontario?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ontario from United Kingdom.

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

Yes. momondo can track prices for United Kingdom to Ontario flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.