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?

JetBlue, KLM, and United Airlines 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

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

12:01 - 18:30ONT Ontario-LHR London Heathrow

22h 29m2 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

£440Multiple Airlines

Thu, 5 Nov - Tue, 10 Nov

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

19h 59m2 stops San Francisco Kastrup Copenhagen

18:40 - 19:28LHR London Heathrow-ONT Ontario

32h 48m2 stops Kastrup Copenhagen San Francisco

£451Multiple Airlines

Mon, 9 Nov - Wed, 18 Nov

12:01 - 18:50ONT Ontario-LHR London Heathrow

22h 49m3 stops San Francisco Kastrup Copenhagen Oslo Gardermoen

17:00 - 19:28LHR London Heathrow-ONT Ontario

34h 28m2 stops Kastrup Copenhagen San Francisco

£452Multiple Airlines

Mon, 9 Nov - Wed, 18 Nov

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

25h 39m2 stops San Francisco Kastrup Copenhagen

06:40 - 19:28LHR London Heathrow-ONT Ontario

20h 48m2 stops Kastrup Copenhagen San Francisco

£457Multiple Airlines

Sun, 8 Nov - Thu, 12 Nov

12:01 - 18:50ONT Ontario-LHR London Heathrow

22h 49m3 stops San Francisco Kastrup Copenhagen Oslo Gardermoen

06:40 - 19:28LHR London Heathrow-ONT Ontario

20h 48m2 stops Kastrup Copenhagen San Francisco

£458Multiple Airlines

Sun, 8 Nov - Thu, 12 Nov

10:35 - 18:30ONT Ontario-LHR London Heathrow

23h 55m3 stops Las Vegas Harry Reid Intl San Francisco Kastrup Copenhagen

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

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

£477Multiple Airlines

Wed, 4 Nov - Tue, 10 Nov

10:35 - 18:30ONT Ontario-LHR London Heathrow

23h 55m3 stops Las Vegas Harry Reid Intl San Francisco Kastrup Copenhagen

19:50 - 19:28LHR London Heathrow-ONT Ontario

31h 38m3 stops Oslo Gardermoen Kastrup Copenhagen San Francisco

£480Multiple Airlines

Wed, 4 Nov - Wed, 11 Nov

06:25 - 19:30ONT Ontario-LHR London Heathrow

29h 05m2 stops Denver Intl Reykjavik Keflavik Intl

12:15 - 23:51LHR London Heathrow-ONT Ontario

19h 36m2 stops Reykjavik Keflavik Intl Denver Intl

£492Multiple Airlines

Tue, 10 Nov - Tue, 17 Nov

06:25 - 19:30ONT Ontario-LHR London Heathrow

29h 05m2 stops Denver Intl Reykjavik Keflavik Intl

12:15 - 23:51LHR London Heathrow-ONT Ontario

19h 36m2 stops Reykjavik Keflavik Intl Denver Intl

£492Multiple Airlines

Wed, 4 Nov - Tue, 10 Nov

06:25 - 19:30ONT Ontario-LHR London Heathrow

29h 05m2 stops Denver Intl Reykjavik Keflavik Intl

20:35 - 23:51LHR London Heathrow-ONT Ontario

35h 16m2 stops Reykjavik Keflavik Intl Denver Intl

£495Multiple Airlines

Wed, 4 Nov - Wed, 11 Nov

Cheap last-minute flights

Enter your travel dates to find the best prices.

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

15h 51m1 stop Seattle/Tacoma Intl

17:00 - 18:00LHR London Heathrow-ONT Ontario

33h 00m1 stop Seattle/Tacoma Intl

£549Alaska Airlines

Mon, 28 Sep - Tue, 13 Oct

11:54 - 15:35ONT Ontario-LHR London Heathrow

19h 41m1 stop Seattle/Tacoma Intl

06:30 - 17:12LHR London Heathrow-ONT Ontario

18h 42m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

£554KLM

Wed, 30 Sep - Tue, 6 Oct

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

15h 51m1 stop Seattle/Tacoma Intl

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

14h 24m1 stop Seattle/Tacoma Intl

£560Alaska Airlines

Tue, 29 Sep - Fri, 2 Oct

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

15h 51m1 stop Seattle/Tacoma Intl

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

25h 17m1 stop Seattle/Tacoma Intl

£564Alaska Airlines

Mon, 28 Sep - Tue, 13 Oct

13:04 - 15:35ONT Ontario-LHR London Heathrow

18h 31m2 stops Salt Lake City Seattle/Tacoma Intl

11:40 - 23:55LHR London Heathrow-ONT Ontario

20h 15m2 stops Seattle/Tacoma Intl Salt Lake City

£565Virgin Atlantic

Wed, 30 Sep - Tue, 6 Oct

06:02 - 15:05ONT Ontario-LHR London Heathrow

25h 03m1 stop Seattle/Tacoma Intl

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

25h 17m1 stop Seattle/Tacoma Intl

£568Alaska Airlines

Sun, 27 Sep - Wed, 7 Oct

12:10 - 15:05ONT Ontario-LHR London Heathrow

18h 55m1 stop Seattle/Tacoma Intl

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

25h 17m1 stop Seattle/Tacoma Intl

£572Alaska Airlines

Mon, 28 Sep - Tue, 13 Oct

06:02 - 15:05ONT Ontario-LHR London Heathrow

25h 03m1 stop Seattle/Tacoma Intl

17:00 - 13:16LHR London Heathrow-ONT Ontario

28h 16m1 stop Seattle/Tacoma Intl

£574Alaska Airlines

Sun, 27 Sep - Tue, 13 Oct

06:02 - 15:05ONT Ontario-LHR London Heathrow

25h 03m1 stop Seattle/Tacoma Intl

17:00 - 18:00LHR London Heathrow-ONT Ontario

33h 00m1 stop Seattle/Tacoma Intl

£574Alaska Airlines

Sun, 27 Sep - Tue, 13 Oct

06:02 - 15:05ONT Ontario-LHR London Heathrow

25h 03m1 stop Seattle/Tacoma Intl

17:00 - 18:00LHR London Heathrow-ONT Ontario

33h 00m1 stop Seattle/Tacoma Intl

£576Alaska Airlines

Sun, 27 Sep - Tue, 13 Oct

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Virgin Atlantic flights from Ontario to United Kingdom

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

Virgin Atlantic

4 Nov

ONT06:00Ontario

17h 05m

2 stops

LHR07:05London Heathrow

11 Nov

LHR12:20London Heathrow

18h 40m

1 stop

ONT23:00Ontario

£544

Virgin Atlantic

20 Oct

ONT13:35Ontario

13h 25m

1 stop

LHR11:00London Heathrow

27 Oct

LHR12:20London Heathrow

17h 23m

1 stop

ONT22:43Ontario

£546

Virgin Atlantic

19 Oct

ONT18:00Ontario

13h 35m

1 stop

LHR15:35London Heathrow

27 Oct

LHR12:20London Heathrow

17h 23m

1 stop

ONT22:43Ontario

£553

Alaska Airlines flights from Ontario to United Kingdom

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

Alaska Airlines

4 Oct

ONT06:02Ontario

25h 03m

1 stop

LHR15:05London Heathrow

14 Oct

LHR17:00London Heathrow

25h 17m

1 stop

ONT10:17Ontario

£545

Alaska Airlines

28 Sept

ONT15:14Ontario

15h 51m

1 stop

LHR15:05London Heathrow

13 Oct

LHR17:00London Heathrow

33h 00m

1 stop

ONT18:00Ontario

£549

Alaska Airlines

4 Oct

ONT06:02Ontario

25h 03m

1 stop

LHR15:05London Heathrow

20 Oct

LHR17:00London Heathrow

33h 00m

1 stop

ONT18:00Ontario

£550

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

Thu 5/11

12:01-18:30

2 stops22h 29m

London Heathrow

Tue 10/11

06:40-09:40

3 stops35h 00m

£440

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 9/11

12:01-16:00

2 stops19h 59m

London Heathrow

Wed 18/11

18:40-19:28

2 stops32h 48m

£451

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 9/11

12:01-18:50

3 stops22h 49m

London Heathrow

Wed 18/11

17:00-19:28

2 stops34h 28m

£452

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 8/11

12:01-21:40

2 stops25h 39m

London Heathrow

Thu 12/11

06:40-19:28

2 stops20h 48m

£457

Fastest return journey

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 8/11

12:01-18:50

3 stops22h 49m

London Heathrow

Thu 12/11

06:40-19:28

2 stops20h 48m

£458

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 4/11

10:35-18:30

3 stops23h 55m

London Heathrow

Tue 10/11

06:40-09:40

3 stops35h 00m

£477

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 4/11

10:35-18:30

3 stops23h 55m

London Heathrow

Wed 11/11

19:50-19:28

3 stops31h 38m

£480

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 10/11

06:25-19:30

2 stops29h 05m

London Heathrow

Tue 17/11

12:15-23:51

2 stops19h 36m

£492

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 4/11

06:25-19:30

2 stops29h 05m

London Heathrow

Tue 10/11

12:15-23:51

2 stops19h 36m

£492

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 4/11

06:25-19:30

2 stops29h 05m

London Heathrow

Wed 11/11

20:35-23:51

2 stops35h 16m

£495

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 January. Flight prices, which tend to average around £518, 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 January, then departing from Ontario during the month December is also very affordable. Most momondo users find prices during this month for around £528.

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

You could potentially save up to 14% 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 16m
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 £440.

The fastest flight from Ontario to United Kingdom takes 12h 16m

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.