What 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 48% of people opting to fly with this airline when traveling to United Kingdom. Keep in mind that there are 24 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?

British Airways, United Airlines, 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 were last updated today.

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

As of September 2026, there are 6 operators available to choose from for flights from Ontario Airport to United Kingdom.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, 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 travel and health documents required for your trip to United Kingdom can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at United Kingdom. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$314 Cheap Flights from Ontario to the United Kingdom in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to the United Kingdom

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:25 am - 7:30 pmONT Ontario-LHR London Heathrow

29h 05m2 stops Denver Intl Reykjavik Keflavik Intl

12:15 pm - 11:51 pmLHR London Heathrow-ONT Ontario

19h 36m2 stops Reykjavik Keflavik Intl Denver Intl

$653Multiple Airlines

Tue, Nov 10 - Tue, Nov 17

6:25 am - 7:30 pmONT Ontario-LHR London Heathrow

29h 05m2 stops Denver Intl Reykjavik Keflavik Intl

12:15 pm - 11:51 pmLHR London Heathrow-ONT Ontario

19h 36m2 stops Reykjavik Keflavik Intl Denver Intl

$654Multiple Airlines

Wed, Nov 4 - Tue, Nov 10

1:35 pm - 11:00 amONT Ontario-LHR London Heathrow

13h 25m1 stop Salt Lake City

12:20 pm - 10:43 pmLHR London Heathrow-ONT Ontario

17h 23m1 stop Seattle/Tacoma Intl

$725Virgin Atlantic

Tue, Oct 20 - Tue, Oct 27

6:00 pm - 3:35 pmONT Ontario-LHR London Heathrow

13h 35m1 stop Seattle/Tacoma Intl

12:20 pm - 10:43 pmLHR London Heathrow-ONT Ontario

17h 23m1 stop Seattle/Tacoma Intl

$734Virgin Atlantic

Mon, Oct 19 - Tue, Oct 27

7:07 am - 7:50 amONT Ontario-LHR London Heathrow

17h 43m1 stop Atlanta Hartsfield-Jackson

6:30 am - 10:43 pmLHR London Heathrow-ONT Ontario

24h 13m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$736Delta

Mon, Oct 26 - Tue, Nov 3

12:16 pm - 11:40 amONT Ontario-LHR London Heathrow

15h 24m1 stop Atlanta Hartsfield-Jackson

6:20 am - 4:24 pmLHR London Heathrow-ONT Ontario

18h 04m2 stops Paris Charles de Gaulle Salt Lake City

$737Delta

Wed, Nov 4 - Tue, Nov 10

2:13 pm - 12:20 pmONT Ontario-LHR London Heathrow

15h 07m1 stop Seattle/Tacoma Intl

2:45 pm - 11:31 pmLHR London Heathrow-ONT Ontario

16h 46m1 stop Seattle/Tacoma Intl

$743Alaska Airlines

Tue, Oct 27 - Tue, Nov 24

11:13 am - 12:20 pmONT Ontario-LHR London Heathrow

18h 07m1 stop Seattle/Tacoma Intl

2:45 pm - 11:31 pmLHR London Heathrow-ONT Ontario

16h 46m1 stop Seattle/Tacoma Intl

$743Alaska Airlines

Tue, Oct 27 - Wed, Nov 25

4:03 pm - 12:30 pmONT Ontario-BHX Birmingham

36h 27m2 stops San Francisco Frankfurt am Main

6:00 am - 8:20 pmBHX Birmingham-ONT Ontario

22h 20m2 stops Frankfurt am Main Denver Intl

$787United Airlines

Tue, Mar 2 - Fri, Mar 5

6:53 pm - 12:30 pmONT Ontario-BHX Birmingham

33h 37m2 stops San Francisco Frankfurt am Main

6:00 am - 6:44 pmBHX Birmingham-ONT Ontario

20h 44m2 stops Frankfurt am Main Chicago O'Hare Intl

$788United Airlines

Tue, Mar 2 - Fri, Mar 5

Cheap last minute flights

Enter your travel dates to find the best prices.

3:14 pm - 3:05 pmONT Ontario-LHR London Heathrow

15h 51m1 stop Seattle/Tacoma Intl

5:00 pm - 6:00 pmLHR London Heathrow-ONT Ontario

33h 00m1 stop Seattle/Tacoma Intl

$729Alaska Airlines

Mon, Sep 28 - Tue, Oct 13

3:14 pm - 3:05 pmONT Ontario-LHR London Heathrow

15h 51m1 stop Seattle/Tacoma Intl

5:00 pm - 11:42 pmLHR London Heathrow-ONT Ontario

14h 42m1 stop Seattle/Tacoma Intl

$744Alaska Airlines

Tue, Sep 29 - Thu, Oct 15

1:04 pm - 10:00 amONT Ontario-LHR London Heathrow

12h 56m1 stop Salt Lake City

10:55 am - 4:35 pmLHR London Heathrow-ONT Ontario

13h 40m1 stop Salt Lake City

$794Multiple Airlines

Wed, Sep 30 - Sun, Oct 4

6:00 pm - 3:35 pmONT Ontario-LHR London Heathrow

13h 35m1 stop Seattle/Tacoma Intl

11:40 am - 10:43 pmLHR London Heathrow-ONT Ontario

19h 03m1 stop Seattle/Tacoma Intl

$844Delta

Fri, Oct 2 - Sun, Oct 18

6:00 pm - 3:35 pmONT Ontario-LHR London Heathrow

13h 35m1 stop Seattle/Tacoma Intl

11:40 am - 10:43 pmLHR London Heathrow-ONT Ontario

19h 03m1 stop Seattle/Tacoma Intl

$844Delta

Fri, Oct 2 - Mon, Oct 19

6:00 am - 8:05 amONT Ontario-EDI Edinburgh Turnhouse

18h 05m2 stops Houston George Bush Intcntl Newark

11:30 am - 10:49 pmEDI Edinburgh Turnhouse-ONT Ontario

19h 19m1 stop Chicago O'Hare Intl

$865United Airlines

Mon, Sep 28 - Mon, Oct 5

6:00 am - 8:05 amONT Ontario-EDI Edinburgh Turnhouse

18h 05m2 stops Houston George Bush Intcntl Newark

12:30 pm - 10:51 pmEDI Edinburgh Turnhouse-ONT Ontario

18h 21m2 stops Washington, D.C. Dulles Intl San Francisco

$865United Airlines

Mon, Sep 28 - Mon, Oct 5

10:39 pm - 8:45 pmONT Ontario-LHR London Heathrow

14h 06m1 stop New York John F Kennedy Intl

11:55 am - 10:12 pmLHR London Heathrow-ONT Ontario

18h 17m1 stop New York John F Kennedy Intl

$889JetBlue

Sun, Sep 27 - Tue, Oct 13

2:22 pm - 12:50 pmONT Ontario-LHR London Heathrow

14h 28m1 stop Dallas/Fort Worth

1:50 pm - 10:59 pmLHR London Heathrow-ONT Ontario

16h 09m1 stop Charlotte Douglas

$1,092British Airways

Sun, Sep 27 - Wed, Oct 28

2:22 pm - 12:50 pmONT Ontario-LHR London Heathrow

14h 28m1 stop Dallas/Fort Worth

4:25 pm - 11:52 pmLHR London Heathrow-ONT Ontario

15h 27m1 stop Dallas/Fort Worth

$1,153British Airways

Mon, Sep 28 - Mon, Oct 5

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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

Sep 28

ONT3:14 pmOntario

15h 51m

1 stop

LHR3:05 pmLondon Heathrow

Oct 13

LHR5:00 pmLondon Heathrow

33h 00m

1 stop

ONT6:00 pmOntario

$729

Alaska Airlines

Oct 4

ONT6:02 amOntario

25h 03m

1 stop

LHR3:05 pmLondon Heathrow

Oct 20

LHR5:00 pmLondon Heathrow

33h 00m

1 stop

ONT6:00 pmOntario

$730

Alaska Airlines

Oct 4

ONT6:02 amOntario

25h 03m

1 stop

LHR3:05 pmLondon Heathrow

Oct 20

LHR5:00 pmLondon Heathrow

33h 00m

1 stop

ONT6:00 pmOntario

$735

Virgin Atlantic flights from Ontario to United Kingdom

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

Virgin Atlantic

Oct 20

ONT1:35 pmOntario

13h 25m

1 stop

LHR11:00 amLondon Heathrow

Oct 27

LHR12:20 pmLondon Heathrow

17h 23m

1 stop

ONT10:43 pmOntario

$725

Virgin Atlantic

Oct 19

ONT6:00 pmOntario

13h 35m

1 stop

LHR3:35 pmLondon Heathrow

Oct 27

LHR12:20 pmLondon Heathrow

17h 23m

1 stop

ONT10:43 pmOntario

$734

Virgin Atlantic

Nov 24

ONT7:05 amOntario

15h 20m

1 stop

LHR6:25 amLondon Heathrow

Jan 13

LHR10:45 amLondon Heathrow

13h 27m

1 stop

ONT4:12 pmOntario

$761

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 round-trip

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 11/10

6:25 am-7:30 pm

2 stops29h 05m

London Heathrow

Tue 11/17

12:15 pm-11:51 pm

2 stops19h 36m

$653

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 11/4

6:25 am-7:30 pm

2 stops29h 05m

London Heathrow

Tue 11/10

12:15 pm-11:51 pm

2 stops19h 36m

$654

Quickest round-trip

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 10/20

1:35 pm-11:00 am

1 stop13h 25m

London Heathrow

Tue 10/27

12:20 pm-10:43 pm

1 stop17h 23m

$725

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 10/19

6:00 pm-3:35 pm

1 stop13h 35m

London Heathrow

Tue 10/27

12:20 pm-10:43 pm

1 stop17h 23m

$734

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Mon 10/26

7:07 am-7:50 am

1 stop17h 43m

London Heathrow

Tue 11/3

6:30 am-10:43 pm

2 stops24h 13m

$736

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 11/4

12:16 pm-11:40 am

1 stop15h 24m

London Heathrow

Tue 11/10

6:20 am-4:24 pm

2 stops18h 04m

$737

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 10/27

2:13 pm-12:20 pm

1 stop15h 07m

London Heathrow

Tue 11/24

2:45 pm-11:31 pm

1 stop16h 46m

$743

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 10/27

11:13 am-12:20 pm

1 stop18h 07m

London Heathrow

Wed 11/25

2:45 pm-11:31 pm

1 stop16h 46m

$743

OntarioBirmingham

ONT Ontario - BHX Birmingham

ONTBHX

Ontario

Tue 3/2

4:03 pm-12:30 pm

2 stops36h 27m

Birmingham

Fri 3/5

6:00 am-8:20 pm

2 stops22h 20m

$787

OntarioBirmingham

ONT Ontario - BHX Birmingham

ONTBHX

Ontario

Tue 3/2

6:53 pm-12:30 pm

2 stops33h 37m

Birmingham

Fri 3/5

6:00 am-6:44 pm

2 stops20h 44m

$788

Flights are sorted by cheapest round-trip 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?

In general, January is the cheapest month to fly from Ontario to United Kingdom. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $688. If you aren’t able to travel to United Kingdom during the month of January, then flying in December is also cheap. Prices for this month can be found on momondo for an average of $743.

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	$314
Fastest flight time	12h 36m
Direct flights	None

The best one-way flight to United Kingdom from Ontario in the past 72 hours is $314. The best round-trip flight deal from Ontario to United Kingdom found on momondo in the last 72 hours is $653.

The fastest flight from Ontario to United Kingdom takes 12h 36m

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 were last updated today.
How many operators does momondo search for flights from Ontario Airport to United Kingdom?
As of September 2026, there are 6 operators available to choose from for flights from Ontario Airport to United Kingdom.
How old do you have to be to fly from Ontario Airport to United Kingdom?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, 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 travel and health documents required for your trip to United Kingdom can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at United Kingdom. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Ontario to United Kingdom

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

Airline	Rating	Free Cancellation	Price
Virgin Atlantic	PriceFrom $488	Free Cancellation	Rating 7.4 694 reviews	Search Virgin Atlantic flights
American Airlines	PriceFrom $567	Free Cancellation	Rating 7.0 12,091 reviews	Search American Airlines flights
British Airways	PriceFrom $615	Free Cancellation	Rating 6.7 8,233 reviews	Search British Airways flights
United Airlines	PriceFrom $703	Free Cancellation	Rating 7.4 10,245 reviews	Search United Airlines flights
Delta	PriceFrom $710	Free Cancellation	Rating 7.8 8,608 reviews	Search Delta flights
Alaska Airlines	PriceFrom $806	Free Cancellation	Rating 7.9 12,977 reviews	Search Alaska Airlines flights

Why use momondo?

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

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 Ontario to United Kingdom for you.

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

momondo does allow users to show only those flights to United Kingdom from Ontario which offer a flexible booking policy as well as other useful filters and features.

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?

If you are not ready to book a flight from Ontario to United Kingdom now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to United Kingdom and let you know when they change.