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 22 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?

KLM, Virgin Atlantic, and JetBlue 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 August 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.

$285 Cheap Flights from Ontario to the United Kingdom in 2026

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.

2:22 pm - 12:00 pmONT Ontario-LHR London Heathrow

13h 38m1 stop Dallas/Fort Worth

2:45 pm - 10:54 pmLHR London Heathrow-ONT Ontario

16h 09m1 stop Seattle/Tacoma Intl

$803Multiple Airlines

Tue, Nov 10 - Tue, Nov 17

6:00 am - 12:20 pmONT Ontario-LHR London Heathrow

22h 20m1 stop Seattle/Tacoma Intl

2:45 pm - 10:39 pmLHR London Heathrow-ONT Ontario

15h 54m1 stop Seattle/Tacoma Intl

$804Alaska Airlines

Tue, Jan 19 - Sun, Jan 24

2:22 pm - 12:00 pmONT Ontario-LHR London Heathrow

13h 38m1 stop Dallas/Fort Worth

2:45 pm - 11:04 pmLHR London Heathrow-ONT Ontario

16h 19m1 stop Seattle/Tacoma Intl

$804Multiple Airlines

Tue, Nov 17 - Sat, Nov 21

6:00 am - 12:20 pmONT Ontario-LHR London Heathrow

22h 20m1 stop Seattle/Tacoma Intl

2:45 pm - 10:39 pmLHR London Heathrow-ONT Ontario

15h 54m1 stop Seattle/Tacoma Intl

$804Alaska Airlines

Wed, Dec 2 - Thu, Dec 10

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

$805United Airlines

Mon, Dec 7 - Thu, Dec 10

12:46 pm - 10:00 amONT Ontario-LHR London Heathrow

13h 14m1 stop Dallas/Fort Worth

2:45 pm - 10:57 pmLHR London Heathrow-ONT Ontario

16h 12m1 stop Dallas/Fort Worth

$830British Airways

Tue, Dec 8 - Tue, Dec 15

3:09 pm - 12:15 pmONT Ontario-LHR London Heathrow

13h 06m1 stop Dallas/Fort Worth

2:45 pm - 10:49 pmLHR London Heathrow-ONT Ontario

16h 04m1 stop Dallas/Fort Worth

$841British Airways

Wed, Jan 6 - Thu, Jan 21

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

33h 37m3 stops San Francisco Boston Logan Intl Frankfurt am Main

6:00 am - 11:06 pmBHX Birmingham-ONT Ontario

25h 06m2 stops Frankfurt am Main San Francisco

$868United Airlines

Mon, Dec 7 - Thu, Dec 10

7:07 am - 7:45 amONT Ontario-LHR London Heathrow

16h 38m2 stops Atlanta Hartsfield-Jackson Detroit Metropolitan Wayne County

6:30 am - 5:13 pmLHR London Heathrow-ONT Ontario

18h 43m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$871Delta

Wed, Nov 4 - Wed, Nov 18

5:53 pm - 10:40 amONT Ontario-LHR London Heathrow

32h 47m1 stop Seattle/Tacoma Intl

6:30 am - 5:13 pmLHR London Heathrow-ONT Ontario

18h 43m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$872Delta

Sun, Nov 22 - Fri, Nov 27

Cheap last minute flights

Enter your travel dates to find the best prices.

1:56 pm - 5:35 pmONT Ontario-MAN Manchester

19h 39m2 stops San Francisco Frankfurt am Main

6:05 am - 10:35 pmMAN Manchester-ONT Ontario

24h 30m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

$1,000United Airlines

Wed, Aug 12 - Thu, Sep 3

1:56 pm - 5:35 pmONT Ontario-MAN Manchester

19h 39m2 stops San Francisco Frankfurt am Main

10:35 am - 10:59 pmMAN Manchester-ONT Ontario

20h 24m2 stops Munich Franz Josef Strauss San Francisco

$1,000United Airlines

Wed, Aug 12 - Thu, Sep 3

1:06 pm - 10:00 amONT Ontario-LHR London Heathrow

12h 54m1 stop Salt Lake City

10:55 am - 4:24 pmLHR London Heathrow-ONT Ontario

13h 29m1 stop Salt Lake City

$1,046KLM

Wed, Aug 12 - Wed, Aug 19

7:05 am - 11:50 amONT Ontario-EDI Edinburgh Turnhouse

20h 45m1 stop Atlanta Hartsfield-Jackson

9:00 am - 7:53 pmEDI Edinburgh Turnhouse-ONT Ontario

18h 53m1 stop Atlanta Hartsfield-Jackson

$1,062Delta

Sun, Aug 16 - Tue, Sep 1

12:00 pm - 11:50 amONT Ontario-EDI Edinburgh Turnhouse

15h 50m1 stop Atlanta Hartsfield-Jackson

9:00 am - 6:30 pmEDI Edinburgh Turnhouse-ONT Ontario

17h 30m1 stop Atlanta Hartsfield-Jackson

$1,062Multiple Airlines

Wed, Aug 12 - Thu, Aug 20

6:01 pm - 3:35 pmONT Ontario-LHR London Heathrow

13h 34m1 stop Seattle/Tacoma Intl

10:55 am - 4:24 pmLHR London Heathrow-ONT Ontario

13h 29m1 stop Salt Lake City

$1,080Virgin Atlantic

Wed, Aug 12 - Wed, Aug 26

5:54 pm - 3:05 pmONT Ontario-LHR London Heathrow

13h 11m1 stop Seattle/Tacoma Intl

5:00 pm - 11:04 amLHR London Heathrow-ONT Ontario

26h 04m1 stop Seattle/Tacoma Intl

$1,082Alaska Airlines

Wed, Aug 12 - Wed, Aug 19

5:54 pm - 3:05 pmONT Ontario-LHR London Heathrow

13h 11m1 stop Seattle/Tacoma Intl

5:00 pm - 11:04 amLHR London Heathrow-ONT Ontario

26h 04m1 stop Seattle/Tacoma Intl

$1,083Alaska Airlines

Wed, Aug 12 - Wed, Aug 19

12:00 pm - 1:15 pmONT Ontario-LHR London Heathrow

17h 15m1 stop Atlanta Hartsfield-Jackson

11:45 am - 10:45 pmLHR London Heathrow-ONT Ontario

19h 00m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,110Delta

Thu, Aug 13 - Thu, Aug 20

7:05 am - 6:20 amONT Ontario-LHR London Heathrow

15h 15m1 stop Dallas/Fort Worth

2:45 pm - 10:59 pmLHR London Heathrow-ONT Ontario

16h 14m1 stop Dallas/Fort Worth

$1,130British Airways

Thu, Aug 13 - Thu, Aug 20

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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

Nov 8

ONT6:00 amOntario

22h 20m

1 stop

LHR12:20 pmLondon Heathrow

Nov 13

LHR2:45 pmLondon Heathrow

16h 09m

1 stop

ONT10:54 pmOntario

$806

Alaska Airlines

Nov 7

ONT4:09 pmOntario

36h 11m

1 stop

LHR12:20 pmLondon Heathrow

Nov 15

LHR2:45 pmLondon Heathrow

16h 09m

1 stop

ONT10:54 pmOntario

$815

Alaska Airlines

Nov 7

ONT4:09 pmOntario

36h 11m

1 stop

LHR12:20 pmLondon Heathrow

Nov 17

LHR2:45 pmLondon Heathrow

35h 32m

1 stop

ONT6:17 pmOntario

$821

Iberia flights from Ontario to United Kingdom

Our best Iberia deals on Ontario to United Kingdom flight tickets

Iberia

Nov 23

ONT6:00 amOntario

20h 00m

1 stop

LHR10:00 amLondon Heathrow

Dec 2

LHR7:40 pmLondon Heathrow

22h 14m

2 stops

ONT9:54 amOntario

$862

Iberia

Nov 23

ONT6:00 amOntario

20h 50m

2 stops

LGW10:50 amLondon Gatwick

Dec 2

LGW7:40 pmLondon Gatwick

22h 14m

2 stops

ONT9:54 amOntario

$869

Iberia

Oct 26

ONT7:00 amOntario

18h 15m

1 stop

LHR8:15 amLondon Heathrow

Nov 3

LHR6:05 amLondon Heathrow

24h 52m

2 stops

ONT10:57 pmOntario

$901

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 11/10

2:22 pm-12:00 pm

1 stop13h 38m

London Heathrow

Tue 11/17

2:45 pm-10:54 pm

1 stop16h 09m

$803

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 1/19

6:00 am-12:20 pm

1 stop22h 20m

London Heathrow

Sun 1/24

2:45 pm-10:39 pm

1 stop15h 54m

$804

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 11/17

2:22 pm-12:00 pm

1 stop13h 38m

London Heathrow

Sat 11/21

2:45 pm-11:04 pm

1 stop16h 19m

$804

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 12/2

6:00 am-12:20 pm

1 stop22h 20m

London Heathrow

Thu 12/10

2:45 pm-10:39 pm

1 stop15h 54m

$804

OntarioBirmingham

ONT Ontario - BHX Birmingham

ONTBHX

Ontario

Mon 12/7

4:03 pm-12:30 pm

2 stops36h 27m

Birmingham

Thu 12/10

6:00 am-8:20 pm

2 stops22h 20m

$805

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Tue 12/8

12:46 pm-10:00 am

1 stop13h 14m

London Heathrow

Tue 12/15

2:45 pm-10:57 pm

1 stop16h 12m

$830

Quickest round-trip

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 1/6

3:09 pm-12:15 pm

1 stop13h 06m

London Heathrow

Thu 1/21

2:45 pm-10:49 pm

1 stop16h 04m

$841

OntarioBirmingham

ONT Ontario - BHX Birmingham

ONTBHX

Ontario

Mon 12/7

6:53 pm-12:30 pm

3 stops33h 37m

Birmingham

Thu 12/10

6:00 am-11:06 pm

2 stops25h 06m

$868

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Wed 11/4

7:07 am-7:45 am

2 stops16h 38m

London Heathrow

Wed 11/18

6:30 am-5:13 pm

2 stops18h 43m

$871

OntarioLondon

ONT Ontario - LHR London Heathrow

ONTLHR

Ontario

Sun 11/22

5:53 pm-10:40 am

1 stop32h 47m

London Heathrow

Fri 11/27

6:30 am-5:13 pm

2 stops18h 43m

$872

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, March 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 $652. If you aren’t able to travel to United Kingdom during the month of March, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $654.

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

You could potentially save up to 25% 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	13h 06m
Direct flights	None

The fastest flight from Ontario to United Kingdom takes 13h 06m

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

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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 August 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 $469	Free Cancellation	Rating 7.5 694 reviews	Search Virgin Atlantic flights
Delta	PriceFrom $535	Free Cancellation	Rating 7.8 8,506 reviews	Search Delta flights
American Airlines	PriceFrom $567	Free Cancellation	Rating 7.1 11,910 reviews	Search American Airlines flights
British Airways	PriceFrom $615	Free Cancellation	Rating 6.7 8,159 reviews	Search British Airways flights
United Airlines	PriceFrom $665	Free Cancellation	Rating 7.4 10,111 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $806	Free Cancellation	Rating 7.9 12,797 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.