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

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

Which airlines fly to United Kingdom?

Virgin Atlantic, British Airways and Aer Lingus are the top three most popular airlines that fly to United Kingdom from Ontario according to our data. Virgin Atlantic is the first choice among our users, with 40% 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.

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.

£212 Cheap Flights from Ontario to the United Kingdom in 2026

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.

13:35 - 07:25ONT Ontario-LHR London Heathrow

33h 50m1 stop San Francisco

06:50 - 18:47LHR London Heathrow-ONT Ontario

19h 57m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

£546United Airlines

Sun, 1 Nov - Wed, 4 Nov

13:29 - 07:40ONT Ontario-LHR London Heathrow

34h 11m2 stops Denver Intl Houston George Bush Intcntl

06:50 - 18:47LHR London Heathrow-ONT Ontario

19h 57m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

£558United Airlines

Sun, 1 Nov - Wed, 4 Nov

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

22h 20m1 stop Seattle/Tacoma Intl

14:45 - 22:54LHR London Heathrow-ONT Ontario

16h 09m1 stop Seattle/Tacoma Intl

£596Alaska Airlines

Sun, 1 Nov - Sun, 8 Nov

15:09 - 12:00ONT Ontario-LHR London Heathrow

12h 51m1 stop Dallas/Fort Worth

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

15h 54m1 stop Seattle/Tacoma Intl

£597Multiple Airlines

Mon, 18 Jan - Sat, 23 Jan

16:03 - 12:30ONT Ontario-BHX Birmingham

36h 27m2 stops San Francisco Frankfurt am Main

06:00 - 20:20BHX Birmingham-ONT Ontario

22h 20m2 stops Frankfurt am Main Denver Intl

£598United Airlines

Mon, 7 Dec - Thu, 10 Dec

12:42 - 10:00ONT Ontario-LHR London Heathrow

13h 18m1 stop Dallas/Fort Worth

14:45 - 23:04LHR London Heathrow-ONT Ontario

16h 19m1 stop Seattle/Tacoma Intl

£598Multiple Airlines

Mon, 9 Nov - Fri, 20 Nov

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

22h 20m1 stop Seattle/Tacoma Intl

14:45 - 15:05LHR London Heathrow-ONT Ontario

32h 20m1 stop Seattle/Tacoma Intl

£600Alaska Airlines

Mon, 2 Nov - Wed, 25 Nov

22:39 - 20:45ONT Ontario-LHR London Heathrow

14h 06m1 stop New York John F Kennedy Intl

17:00 - 19:03LHR London Heathrow-ONT Ontario

34h 03m1 stop Seattle/Tacoma Intl

£600Multiple Airlines

Sun, 20 Sep - Sun, 27 Sep

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

22h 20m1 stop Seattle/Tacoma Intl

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

28h 24m1 stop Seattle/Tacoma Intl

£601Alaska Airlines

Sun, 6 Dec - Sun, 13 Dec

23:05 - 20:45ONT Ontario-LHR London Heathrow

13h 40m1 stop New York John F Kennedy Intl

14:45 - 18:00LHR London Heathrow-ONT Ontario

34h 15m1 stop Seattle/Tacoma Intl

£602Multiple Airlines

Wed, 14 Oct - Wed, 28 Oct

Cheap last-minute flights

Enter your travel dates to find the best prices.

13:06 - 10:00ONT Ontario-LHR London Heathrow

12h 54m1 stop Salt Lake City

10:55 - 16:24LHR London Heathrow-ONT Ontario

13h 29m1 stop Salt Lake City

£776KLM

Wed, 12 Aug - Wed, 19 Aug

13:18 - 17:20ONT Ontario-MAN Manchester

20h 02m2 stops Denver Intl Frankfurt am Main

10:35 - 22:59MAN Manchester-ONT Ontario

20h 24m2 stops Munich Franz Josef Strauss San Francisco

£779United Airlines

Thu, 13 Aug - Fri, 28 Aug

10:29 - 09:00ONT Ontario-LHR London Heathrow

14h 31m1 stop Dallas/Fort Worth

11:30 - 22:59LHR London Heathrow-ONT Ontario

19h 29m2 stops Madrid Barajas Dallas/Fort Worth

£785Iberia

Mon, 10 Aug - Fri, 28 Aug

12:00 - 11:50ONT Ontario-EDI Edinburgh Turnhouse

15h 50m1 stop Atlanta Hartsfield-Jackson

09:00 - 18:30EDI Edinburgh Turnhouse-ONT Ontario

17h 30m1 stop Atlanta Hartsfield-Jackson

£788KLM

Tue, 11 Aug - Thu, 20 Aug

07:00 - 08:25ONT Ontario-EDI Edinburgh Turnhouse

17h 25m1 stop Chicago O'Hare Intl

11:30 - 22:35EDI Edinburgh Turnhouse-ONT Ontario

19h 05m1 stop Chicago O'Hare Intl

£788United Airlines

Wed, 12 Aug - Wed, 19 Aug

12:00 - 11:50ONT Ontario-EDI Edinburgh Turnhouse

15h 50m1 stop Atlanta Hartsfield-Jackson

09:00 - 21:52EDI Edinburgh Turnhouse-ONT Ontario

20h 52m1 stop Atlanta Hartsfield-Jackson

£789Delta

Sun, 9 Aug - Thu, 20 Aug

12:00 - 11:50ONT Ontario-EDI Edinburgh Turnhouse

15h 50m1 stop Atlanta Hartsfield-Jackson

09:00 - 19:53EDI Edinburgh Turnhouse-ONT Ontario

18h 53m1 stop Atlanta Hartsfield-Jackson

£791Delta

Sun, 9 Aug - Tue, 18 Aug

12:00 - 11:50ONT Ontario-EDI Edinburgh Turnhouse

15h 50m1 stop Atlanta Hartsfield-Jackson

09:00 - 19:53EDI Edinburgh Turnhouse-ONT Ontario

18h 53m1 stop Atlanta Hartsfield-Jackson

£793Delta

Sun, 9 Aug - Tue, 18 Aug

13:06 - 10:00ONT Ontario-LHR London Heathrow

12h 54m1 stop Salt Lake City

10:55 - 16:24LHR London Heathrow-ONT Ontario

13h 29m1 stop Salt Lake City

£793KLM

Wed, 12 Aug - Wed, 19 Aug

13:06 - 10:00ONT Ontario-LHR London Heathrow

12h 54m1 stop Salt Lake City

10:55 - 16:24LHR London Heathrow-ONT Ontario

13h 29m1 stop Salt Lake City

£802KLM

Wed, 12 Aug - Wed, 19 Aug

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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

1 Nov

ONT06:00Ontario

22h 20m

1 stop

LHR12:20London Heathrow

8 Nov

LHR14:45London Heathrow

16h 09m

1 stop

ONT22:54Ontario

£596

Alaska Airlines

2 Nov

ONT06:00Ontario

22h 20m

1 stop

LHR12:20London Heathrow

25 Nov

LHR14:45London Heathrow

32h 20m

1 stop

ONT15:05Ontario

£600

Alaska Airlines

6 Dec

ONT06:00Ontario

22h 20m

1 stop

LHR12:20London Heathrow

13 Dec

LHR14:45London Heathrow

28h 24m

1 stop

ONT11:09Ontario

£601

British Airways flights from Ontario to United Kingdom

Our best British Airways deals on Ontario to United Kingdom flight tickets

British Airways

11 Nov

ONT06:00Ontario

16h 50m

1 stop

LHR06:50London Heathrow

22 Nov

LHR06:15London Heathrow

20h 42m

2 stops

ONT18:57Ontario

£629

British Airways

26 Jan

ONT15:09Ontario

17h 21m

2 stops

MAN16:30Manchester

3 Feb

MAN17:25Manchester

37h 24m

2 stops

ONT22:49Ontario

£635

British Airways

30 Nov

ONT13:27Ontario

19h 33m

2 stops

EDI17:00Edinburgh Turnhouse

15 Dec

EDI10:55Edinburgh Turnhouse

21h 00m

2 stops

ONT23:55Ontario

£638

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 1/11

13:35-07:25

1 stop33h 50m

London Heathrow

Wed 4/11

06:50-18:47

2 stops19h 57m

£546

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 1/11

13:29-07:40

2 stops34h 11m

London Heathrow

Wed 4/11

06:50-18:47

2 stops19h 57m

£558

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 1/11

06:00-12:20

1 stop22h 20m

London Heathrow

Sun 8/11

14:45-22:54

1 stop16h 09m

£596

Fastest return journey

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 18/1

15:09-12:00

1 stop12h 51m

London Heathrow

Sat 23/1

14:45-22:39

1 stop15h 54m

£597

OntarioBirmingham

ONT Ontario - BHX Birmingham

ONTBHX

Ontario

Mon 7/12

16:03-12:30

2 stops36h 27m

Birmingham

Thu 10/12

06:00-20:20

2 stops22h 20m

£598

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 9/11

12:42-10:00

1 stop13h 18m

London Heathrow

Fri 20/11

14:45-23:04

1 stop16h 19m

£598

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 2/11

06:00-12:20

1 stop22h 20m

London Heathrow

Wed 25/11

14:45-15:05

1 stop32h 20m

£600

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 20/9

22:39-20:45

1 stop14h 06m

London Heathrow

Sun 27/9

17:00-19:03

1 stop34h 03m

£600

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 6/12

06:00-12:20

1 stop22h 20m

London Heathrow

Sun 13/12

14:45-11:09

1 stop28h 24m

£601

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 14/10

23:05-20:45

1 stop13h 40m

London Heathrow

Wed 28/10

14:45-18:00

1 stop34h 15m

£602

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 March. Flight prices, which tend to average around £484, 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 March, then departing from Ontario during the month February is also very affordable. Most momondo users find prices during this month for around £485.

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

You could potentially save up to 26% 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

Fastest flight time	12h 51m
Direct flights	None

The fastest flight from Ontario to United Kingdom takes 12h 51m

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.