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

British Airways, United Airlines, and American Airlines are the most popular carriers operating from Ontario to United Kingdom

What airlines fly to United Kingdom?

British Airways, American Airlines and United 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 51% of people opting to fly with this airline when traveling to United Kingdom. Keep in mind that there are 21 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 were last updated today.

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

As of April 2026, there are 5 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.

$320 Cheap Flights from Ontario to the United Kingdom in 2026

1 adult

0 bags

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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.

7:00 am - 8:25 am

ONT

EDI

17h 25m

1 stop

9:00 am - 6:19 pm

EDI

ONT

41h 19m

2 stops

$865United Airlines

Wed, Aug 19 - Tue, Sep 8

5:00 am - 7:40 am

ONT

EDI

18h 40m

3 stops

9:00 am - 12:38 pm

EDI

ONT

35h 38m

2 stops

$869United Airlines

Wed, Aug 19 - Tue, Sep 8

7:13 pm - 8:05 am

ONT

EDI

28h 52m

2 stops

9:00 am - 6:19 pm

EDI

ONT

41h 19m

2 stops

$870United Airlines

Sat, Aug 22 - Wed, Sep 9

6:00 am - 9:50 am

ONT

GLA

19h 50m

2 stops

7:30 am - 6:15 pm

GLA

ONT

18h 45m

2 stops

$883American Airlines

Sun, Aug 9 - Wed, Aug 19

11:55 am - 3:35 pm

ONT

LHR

19h 40m

1 stop

6:30 am - 4:14 pm

LHR

ONT

17h 44m

2 stops

$896KLM

Sun, Aug 23 - Tue, Sep 8

6:00 am - 11:20 am

ONT

LHR

21h 20m

2 stops

6:30 am - 9:56 pm

LHR

ONT

23h 26m

2 stops

$900Delta

Mon, Aug 3 - Thu, Aug 20

9:40 am - 1:05 pm

ONT

LHR

19h 25m

2 stops

6:30 am - 6:01 pm

LHR

ONT

19h 31m

2 stops

$901Delta

Mon, Aug 3 - Thu, Aug 20

10:59 am - 8:05 am

ONT

LHR

13h 06m

1 stop

10:05 am - 4:22 pm

LHR

ONT

14h 17m

1 stop

$910British Airways

Tue, May 12 - Wed, May 20

12:59 pm - 6:45 pm

ONT

GLA

21h 46m

2 stops

8:35 am - 9:12 pm

GLA

ONT

20h 37m

2 stops

$916British Airways

Sun, Aug 16 - Thu, Aug 27

10:59 am - 11:25 am

ONT

NCL

16h 26m

2 stops

9:35 am - 11:46 pm

NCL

ONT

22h 11m

2 stops

$1,013American Airlines

Mon, May 11 - Wed, May 20

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KLM flights from Ontario to United Kingdom

Our best KLM deals on Ontario to United Kingdom flight tickets

KLM

Aug 23

ONT11:55 amOntario

19h 40m

1 stop

LHR3:35 pmLondon Heathrow

Sep 8

LHR6:30 amLondon Heathrow

17h 44m

2 stops

ONT4:14 pmOntario

$896

KLM

May 13

ONT1:29 pmOntario

12h 31m

1 stop

LHR10:00 amLondon Heathrow

May 20

LHR10:55 amLondon Heathrow

13h 22m

1 stop

ONT4:17 pmOntario

$924

KLM

Aug 17

ONT1:00 pmOntario

13h 00m

1 stop

LHR10:00 amLondon Heathrow

Sep 2

LHR9:20 amLondon Heathrow

16h 41m

1 stop

ONT6:01 pmOntario

$925

Alaska Airlines flights from Ontario to United Kingdom

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

Alaska Airlines

Aug 15

ONT9:20 pmOntario

33h 45m

1 stop

LHR3:05 pmLondon Heathrow

Aug 27

LHR5:00 pmLondon Heathrow

14h 24m

1 stop

ONT11:24 pmOntario

$931

Alaska Airlines

Oct 3

ONT4:00 pmOntario

15h 05m

1 stop

LHR3:05 pmLondon Heathrow

Oct 8

LHR5:00 pmLondon Heathrow

26h 09m

1 stop

ONT11:09 amOntario

$981

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

Wed 8/19

7:00 am-8:25 am

1 stop17h 25m

Edinburgh Turnhouse

Tue 9/8

9:00 am-6:19 pm

2 stops41h 19m

$865

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

Wed 8/19

5:00 am-7:40 am

3 stops18h 40m

Edinburgh Turnhouse

Tue 9/8

9:00 am-12:38 pm

2 stops35h 38m

$869

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

Sat 8/22

7:13 pm-8:05 am

2 stops28h 52m

Edinburgh Turnhouse

Wed 9/9

9:00 am-6:19 pm

2 stops41h 19m

$870

OntarioGlasgow

ONT - GLA

ONTGLA

Ontario

Sun 8/9

6:00 am-9:50 am

2 stops19h 50m

Glasgow Intl

Wed 8/19

7:30 am-6:15 pm

2 stops18h 45m

$883

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 8/23

11:55 am-3:35 pm

1 stop19h 40m

London Heathrow

Tue 9/8

6:30 am-4:14 pm

2 stops17h 44m

$896

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 8/3

6:00 am-11:20 am

2 stops21h 20m

London Heathrow

Thu 8/20

6:30 am-9:56 pm

2 stops23h 26m

$900

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 8/3

9:40 am-1:05 pm

2 stops19h 25m

London Heathrow

Thu 8/20

6:30 am-6:01 pm

2 stops19h 31m

$901

Quickest round-trip

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 5/12

10:59 am-8:05 am

1 stop13h 06m

London Heathrow

Wed 5/20

10:05 am-4:22 pm

1 stop14h 17m

$910

OntarioGlasgow

ONT - GLA

ONTGLA

Ontario

Sun 8/16

12:59 pm-6:45 pm

2 stops21h 46m

Glasgow Intl

Thu 8/27

8:35 am-9:12 pm

2 stops20h 37m

$916

OntarioNewcastle upon Tyne

ONT - NCL

ONTNCL

Ontario

Mon 5/11

10:59 am-11:25 am

2 stops16h 26m

Newcastle upon Tyne

Wed 5/20

9:35 am-11:46 pm

2 stops22h 11m

$1,013

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, September 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 $251. If you aren’t able to travel to United Kingdom during the month of September, then flying in December is also cheap. Prices for this month can be found on momondo for an average of $282.

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

You could potentially save up to 61% 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 22m
Direct flights	None

The fastest flight from Ontario to United Kingdom takes 12h 22m

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 April 2026, there are 5 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
Delta	PriceFrom $570	Free Cancellation	Rating 7.9 8,466 reviews	Search Delta flights
KLM	PriceFrom $580	Free Cancellation	Rating 7.8 1,512 reviews	Search KLM flights
American Airlines	PriceFrom $617	Free Cancellation	Rating 7.1 11,682 reviews	Search American Airlines flights
British Airways	PriceFrom $624	Free Cancellation	Rating 6.7 7,937 reviews	Search British Airways flights
United Airlines	PriceFrom $662	Free Cancellation	Rating 7.4 9,677 reviews	Search United 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.