Which airlines fly to United Kingdom?

British Airways, Virgin Atlantic and American Airlines are the top three most popular airlines that fly to United Kingdom from Ontario according to our data. British Airways is the first choice among our users, with 39% of people opting to fly with this airline when travelling to United Kingdom. Keep in mind that there are 12 different airlines that fly to United Kingdom on a routine basis, so you have a few additional options to choose from.

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

Virgin Atlantic, British Airways, and KLM are the most popular carriers operating from Ontario to United Kingdom

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

Prices for flights from Ontario Airport to United Kingdom are updated daily.

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

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 Ontario Airport to United Kingdom.

What documentation or ID do you need to fly to United Kingdom?

The necessary travel and health documents for your United Kingdom 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.

£241 Cheap Flights from Ontario to the United Kingdom in 2026/27

Find the cheapest flights from Ontario to the United Kingdom

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One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

13:45 - 10:15ONT Ontario-LHR London Heathrow

36h 30m2 stops Denver Intl Houston George Bush Intcntl

09:00 - 20:19LHR London Heathrow-ONT Ontario

19h 19m2 stops Zurich San Francisco

£570United Airlines

Mon, 1 Mar - Thu, 4 Mar

09:45 - 11:50ONT Ontario-LHR London Heathrow

18h 05m2 stops San Francisco Vancouver Intl

14:45 - 11:09LHR London Heathrow-ONT Ontario

28h 24m1 stop Seattle/Tacoma Intl

£605Multiple Airlines

Wed, 3 Feb - Mon, 15 Feb

07:25 - 11:50ONT Ontario-LHR London Heathrow

20h 25m2 stops San Francisco Vancouver Intl

14:45 - 22:39LHR London Heathrow-ONT Ontario

15h 54m1 stop Seattle/Tacoma Intl

£609Multiple Airlines

Tue, 2 Feb - Tue, 16 Feb

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

15h 25m1 stop Atlanta Hartsfield-Jackson

17:00 - 14:47LHR London Heathrow-ONT Ontario

29h 47m1 stop Seattle/Tacoma Intl

£609Multiple Airlines

Wed, 14 Apr - Mon, 3 May

16:00 - 15:05ONT Ontario-LHR London Heathrow

15h 05m1 stop Seattle/Tacoma Intl

17:00 - 23:59LHR London Heathrow-ONT Ontario

14h 59m1 stop Seattle/Tacoma Intl

£610Alaska Airlines

Sun, 9 May - Sun, 16 May

05:00 - 10:00ONT Ontario-LHR London Heathrow

21h 00m2 stops Denver Intl Montreal Pierre Elliott Trudeau Intl

17:00 - 14:47LHR London Heathrow-ONT Ontario

29h 47m1 stop Seattle/Tacoma Intl

£611Multiple Airlines

Mon, 19 Apr - Mon, 26 Apr

06:00 - 12:20ONT Ontario-LHR London Heathrow

22h 20m1 stop Seattle/Tacoma Intl

14:45 - 22:39LHR London Heathrow-ONT Ontario

15h 54m1 stop Seattle/Tacoma Intl

£612Alaska Airlines

Mon, 15 Feb - Mon, 22 Feb

14:23 - 12:10ONT Ontario-LHR London Heathrow

13h 47m1 stop Dallas/Fort Worth

14:45 - 22:39LHR London Heathrow-ONT Ontario

15h 54m1 stop Seattle/Tacoma Intl

£612Multiple Airlines

Wed, 10 Feb - Wed, 24 Feb

07:00 - 06:50ONT Ontario-LHR London Heathrow

15h 50m1 stop Dallas/Fort Worth

14:45 - 22:39LHR London Heathrow-ONT Ontario

15h 54m1 stop Seattle/Tacoma Intl

£612Multiple Airlines

Tue, 2 Feb - Tue, 16 Feb

16:25 - 13:35ONT Ontario-LHR London Heathrow

13h 10m1 stop Phoenix Sky Harbor Intl

14:45 - 22:39LHR London Heathrow-ONT Ontario

15h 54m1 stop Seattle/Tacoma Intl

£612Multiple Airlines

Sun, 21 Feb - Sun, 28 Feb

Cheap last-minute flights

Enter your travel dates to find the best prices.

17:07 - 10:50ONT Ontario-LHR London Heathrow

33h 43m3 stops Las Vegas Harry Reid Intl Seattle/Tacoma Intl Reykjavik Keflavik Intl

12:15 - 07:20LHR London Heathrow-ONT Ontario

27h 05m3 stops Reykjavik Keflavik Intl Seattle/Tacoma Intl Las Vegas Harry Reid Intl

£687Multiple Airlines

Sat, 14 Nov - Tue, 24 Nov

17:07 - 10:50ONT Ontario-LHR London Heathrow

33h 43m3 stops Las Vegas Harry Reid Intl Seattle/Tacoma Intl Reykjavik Keflavik Intl

12:15 - 08:30LHR London Heathrow-ONT Ontario

28h 15m3 stops Reykjavik Keflavik Intl Seattle/Tacoma Intl Las Vegas Harry Reid Intl

£724Multiple Airlines

Sat, 14 Nov - Sat, 21 Nov

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

16h 30m2 stops San Francisco Toronto Pearson Intl

06:30 - 21:41LHR London Heathrow-ONT Ontario

23h 11m2 stops Frankfurt am Main Houston George Bush Intcntl

£740Multiple Airlines

Fri, 13 Nov - Sun, 15 Nov

11:57 - 10:40ONT Ontario-LHR London Heathrow

14h 43m1 stop Seattle/Tacoma Intl

06:30 - 23:00LHR London Heathrow-ONT Ontario

24h 30m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

£761Virgin Atlantic

Fri, 13 Nov - Wed, 18 Nov

12:01 - 21:40ONT Ontario-LHR London Heathrow

25h 39m2 stops San Francisco Kastrup Copenhagen

06:40 - 09:40LHR London Heathrow-ONT Ontario

35h 00m3 stops Kastrup Copenhagen San Francisco Las Vegas Harry Reid Intl

£765Multiple Airlines

Thu, 12 Nov - Tue, 17 Nov

12:01 - 16:00ONT Ontario-LHR London Heathrow

19h 59m2 stops San Francisco Kastrup Copenhagen

06:40 - 23:51LHR London Heathrow-ONT Ontario

25h 11m3 stops Kastrup Copenhagen San Francisco Denver Intl

£767Multiple Airlines

Thu, 12 Nov - Thu, 19 Nov

05:00 - 11:20ONT Ontario-LHR London Heathrow

22h 20m2 stops Denver Intl Toronto Pearson Intl

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

37h 45m2 stops Vancouver Intl San Francisco

£769Air Canada

Fri, 13 Nov - Wed, 18 Nov

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

14h 00m1 stop San Francisco

10:05 - 17:56LHR London Heathrow-ONT Ontario

15h 51m1 stop San Francisco

£770United Airlines

Tue, 10 Nov - Fri, 27 Nov

12:02 - 12:20ONT Ontario-LHR London Heathrow

16h 18m1 stop Seattle/Tacoma Intl

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

16h 46m1 stop Seattle/Tacoma Intl

£770Alaska Airlines

Tue, 10 Nov - Fri, 20 Nov

12:02 - 12:20ONT Ontario-LHR London Heathrow

16h 18m1 stop Seattle/Tacoma Intl

14:45 - 22:59LHR London Heathrow-ONT Ontario

16h 14m1 stop Seattle/Tacoma Intl

£770Alaska Airlines

Wed, 11 Nov - Thu, 10 Dec

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Alaska Airlines flights from Ontario to United Kingdom

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

Alaska Airlines

13 Feb

ONT16:00Ontario

36h 20m

1 stop

LHR12:20London Heathrow

28 Feb

LHR14:45London Heathrow

15h 54m

1 stop

ONT22:39Ontario

£620

Alaska Airlines

13 Apr

ONT16:00Ontario

15h 05m

1 stop

LHR15:05London Heathrow

11 May

LHR17:00London Heathrow

26h 09m

1 stop

ONT11:09Ontario

£621

Alaska Airlines

6 Mar

ONT16:00Ontario

36h 20m

1 stop

LHR12:20London Heathrow

13 Mar

LHR14:45London Heathrow

15h 54m

1 stop

ONT22:39Ontario

£622

United Airlines flights from Ontario to United Kingdom

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

United Airlines

1 Mar

ONT13:45Ontario

36h 30m

2 stops

LHR10:15London Heathrow

4 Mar

LHR09:00London Heathrow

19h 19m

2 stops

ONT20:19Ontario

£570

United Airlines

1 Mar

ONT07:00Ontario

14h 55m

1 stop

LHR05:55London Heathrow

4 Mar

LHR09:00London Heathrow

19h 19m

2 stops

ONT20:19Ontario

£664

United Airlines

1 Mar

ONT07:00Ontario

15h 40m

2 stops

LHR06:40London Heathrow

4 Mar

LHR13:30London Heathrow

17h 29m

2 stops

ONT22:59Ontario

£677

momondo Fare Finder

Use the filters below to find and compare flights from Ontario to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 1/3

13:45-10:15

2 stops36h 30m

London Heathrow

Thu 4/3

09:00-20:19

2 stops19h 19m

£570

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 3/2

09:45-11:50

2 stops18h 05m

London Heathrow

Mon 15/2

14:45-11:09

1 stop28h 24m

£605

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 2/2

07:25-11:50

2 stops20h 25m

London Heathrow

Tue 16/2

14:45-22:39

1 stop15h 54m

£609

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 14/4

07:00-06:25

1 stop15h 25m

London Heathrow

Mon 3/5

17:00-14:47

1 stop29h 47m

£609

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 9/5

16:00-15:05

1 stop15h 05m

London Heathrow

Sun 16/5

17:00-23:59

1 stop14h 59m

£610

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 19/4

05:00-10:00

2 stops21h 00m

London Heathrow

Mon 26/4

17:00-14:47

1 stop29h 47m

£611

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 15/2

06:00-12:20

1 stop22h 20m

London Heathrow

Mon 22/2

14:45-22:39

1 stop15h 54m

£612

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 10/2

14:23-12:10

1 stop13h 47m

London Heathrow

Wed 24/2

14:45-22:39

1 stop15h 54m

£612

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 2/2

07:00-06:50

1 stop15h 50m

London Heathrow

Tue 16/2

14:45-22:39

1 stop15h 54m

£612

Fastest return journey

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 21/2

16:25-13:35

1 stop13h 10m

London Heathrow

Sun 28/2

14:45-22:39

1 stop15h 54m

£612

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 Ontario to United Kingdom

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 cheapest month to fly to United Kingdom?

The cheapest month to fly to United Kingdom from Ontario is in December. Flight prices, which tend to average around £597, are often lower during this time because this is during the off-season. If you are unable to visit United Kingdom during the month of December, then departing from Ontario during the month November is also very affordable. Most momondo users find prices during this month for around £630.

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

You could potentially save up to 34% on your flight if you consider stops on a Ontario to United Kingdom flight.

Cheap Ontario to United Kingdom flight deals and tips

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

Best price found	£241
Fastest flight time	12h 00m
Direct flights	None

The best one-way flight to United Kingdom from Ontario in the past 72 hours is £241. The best return flight deal from Ontario to United Kingdom found on momondo in the last 72 hours is £570.

The fastest flight from Ontario to United Kingdom takes 12h 00m

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

Search flight deals

Frequently asked questions about flying from Ontario to the United Kingdom

When did momondo last update prices for flights from Ontario Airport to United Kingdom?
Prices for flights from Ontario Airport to United Kingdom are updated daily.
How old do you have to be to fly from Ontario Airport to United Kingdom?
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 Ontario Airport to United Kingdom.
What documentation or ID do you need to fly to United Kingdom?
The necessary travel and health documents for your United Kingdom 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.

Why use momondo?

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

It is quick and easy to find Ontario to United Kingdom 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 United Kingdom that suits you.

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

Yes. momondo allows you to filter the results for Ontario to United Kingdom flights to just show those with flexible booking policies.

How can momondo help me find flights from Ontario to United Kingdom?

momondo provides multiple filters to help you find the best flight to United Kingdom from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Ontario to United Kingdom flights. All you need is a valid email address and we will do the rest; it is that quick and easy.