How long is the flight from United Kingdom to Ontario?

For as low as £391, American Airlines can have you in Ontario from United Kingdom in 20h 03m. The distance from United Kingdom to Ontario is about 5407 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

What are the cheapest airlines to fly from United Kingdom to Ontario one-way?

The cheapet airlines for a one-way flight from United Kingdom to Ontario are American Airlines (£312), British Airways (£322), and Delta (£332).

In terms of precipitation, rainfall in Ontario ranges from 3.0 - 86.0 inches per month. February is typically the wettest month, when rainfall can reach 86.0 mm. June is typically the driest time to visit Ontario when rainfall is around 3.0 mm.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 26.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 12.0 C).

What are the most popular routes from United Kingdom to Ontario?

While some choose either Manchester - Ontario or London Gatwick - Ontario, London Heathrow - Ontario is the most popular route from United Kingdom to Ontario.

What are the most popular airlines that fly from United Kingdom to Ontario?

Before booking your flight from United Kingdom to Ontario check out the most popular airlines for this route: Finnair, British Airways or KLM.

What airport do you fly into for flights to Ontario from United Kingdom?

Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Ontario from United Kingdom.

Can I find deals for flights from United Kingdom to Ontario that include hotel bookings?

Yes. In addition to deals on United Kingdom to Ontario flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from United Kingdom to Ontario?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from United Kingdom to Ontario.

Can I find deals for business class flights from United Kingdom to Ontario?

Yes. Cheapflights offers flight deals from United Kingdom to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£246+ Flights from the United Kingdom to Ontario

Cheap flight deals from United Kingdom to Ontario

Round-trip from	£360
One-way from	£246
Popular in	December
Cheapest in	September
Average price	£399

American Airlines
26/2-2/3
4 total stops
56h 27m total
United Kingdom to Ontario

Search Deals

Iberia
31/10
1 total stop
24h 23m total
United Kingdom to Ontario

Search Deals

Highest demand for flights based on searches. 3% potential increase in price (£12 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Find flight deals from United Kingdom to Ontario

Cheapest flights from United Kingdom to Ontario
Explore the most affordable flight options available from United Kingdom to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Thu 30/1014:45LHR - ONT

1 stop14h 56mVirgin Atlantic

Thu 6/1107:35ONT - LHR

1 stop21h 15mVirgin Atlantic

Deal found 15/9£375

Sat 1/1112:20LHR - ONT

1 stop17h 21mVirgin Atlantic

Sat 8/1107:05ONT - LHR

1 stop15h 20mVirgin Atlantic

Deal found 17/9£377

Wed 1/1012:20LGW - ONT

2 stops40h 51mAmerican Airlines

Sun 5/1023:59ONT - LGW

2 stops24h 11mAmerican Airlines

Deal found 15/9£377

Sat 15/1106:20LHR - ONT

2 stops23h 15mVirgin Atlantic

Sat 13/1213:20ONT - LHR

1 stop12h 40mVirgin Atlantic

Deal found 15/9£379

Sat 22/1116:25LHR - ONT

2 stops39h 27mVirgin Atlantic

Sat 29/1111:45ONT - LHR

1 stop36h 05mVirgin Atlantic

Deal found 14/9£381

Tue 18/1115:00LHR - ONT

1 stop15h 29mBritish Airways

Tue 25/1116:47ONT - LHR

1 stop12h 28mBritish Airways

Deal found 17/9£388

Fri 26/913:25LHR - ONT

1 stop17h 15mVirgin Atlantic

Mon 6/1013:15ONT - LHR

1 stop12h 35mVirgin Atlantic

Deal found 16/9£389

Thu 30/1010:05LHR - ONT

1 stop19h 13mBritish Airways

Thu 6/1114:59ONT - LHR

1 stop12h 41mBritish Airways

Deal found 15/9£390

Wed 1/1010:30LHR - ONT

1 stop20h 03mBritish Airways

Wed 19/1116:47ONT - LHR

1 stop12h 28mBritish Airways

Deal found 15/9£391

Mon 22/915:10LHR - ONT

1 stop15h 23mBritish Airways

Wed 8/1014:51ONT - LHR

1 stop15h 34mBritish Airways

Deal found 15/9£391

Thu 2/1012:00LHR - ONT

1 stop14h 54mBritish Airways

Mon 20/1014:51ONT - LHR

1 stop13h 54mBritish Airways

Deal found 17/9£392

Mon 22/917:25LHR - ONT

2 stops38h 17mVirgin Atlantic

Tue 7/1013:15ONT - LHR

2 stops15h 55mVirgin Atlantic

Deal found 15/9£393

Best flights from United Kingdom to Ontario
Discover carefully curated flight deals from United Kingdom to Ontario that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 September 2025.

Thu 26/212:30LGW - ONT

2 stops33h 14mAmerican Airlines

Mon 2/320:04ONT - LGW

2 stops27h 26mAmerican Airlines

Deal found 14/9£359

Wed 1/1010:30LHR - ONT

1 stop20h 03mBritish Airways

Wed 19/1116:47ONT - LHR

1 stop12h 28mBritish Airways

Deal found 15/9£391

Wed 8/1010:00LCY - ONT

2 stops20h 41mVirgin Atlantic

Wed 15/1013:15ONT - LCY

2 stops21h 15mVirgin Atlantic

Deal found 15/9£408

Fri 10/1015:05LGW - ONT

2 stops35h 47mMultiple Airlines

Wed 22/1006:10ONT - LGW

2 stops18h 00mMultiple Airlines

Deal found 15/9£422

Fri 31/1006:05GLA - ONT

2 stops20h 14mDelta

Fri 7/1107:35ONT - GLA

2 stops25h 00mDelta

Deal found 16/9£452

Tue 10/311:45LGW - ONT

2 stops41h 17mIberia

Tue 24/306:00ONT - LGW

2 stops30h 00mIberia

Deal found 15/9£532

Tue 2/1210:25MAN - ONT

2 stops20h 38mKLM

Tue 16/1206:00ONT - MAN

2 stops22h 45mKLM

Deal found 16/9£608

Fri 31/1011:30EDI - ONT

2 stops32h 03mUnited Airlines

Fri 7/1105:05ONT - EDI

2 stops18h 50mUnited Airlines

Deal found 16/9£626

Wed 1/1012:20LGW - ONT

2 stops40h 51mAmerican Airlines

Sun 5/1023:59ONT - LGW

2 stops24h 11mAmerican Airlines

Deal found 15/9£377

Sun 16/1116:30LHR - ONT

1 stop15h 27mBritish Airways

Tue 25/1112:49ONT - LHR

1 stop14h 51mBritish Airways

Deal found 14/9£391

Sat 15/1111:45LHR - ONT

1 stop17h 26mBritish Airways

Tue 25/1116:47ONT - LHR

1 stop12h 28mBritish Airways

Deal found 14/9£391

Sat 1/1105:45EDI - ONT

2 stops23h 56mDelta

Sat 8/1109:50ONT - EDI

2 stops16h 50mDelta

Deal found 17/9£452

Wed 5/1112:20NCL - ONT

2 stops31h 16mMultiple Airlines

Wed 3/1212:46ONT - NCL

2 stops17h 39mMultiple Airlines

Deal found 16/9£456

Wed 22/1008:40LCY - ONT

2 stops22h 01mVirgin Atlantic

Wed 29/1011:36ONT - LCY

2 stops21h 59mVirgin Atlantic

Deal found 15/9£458

Thu 16/1010:25LGW - ONT

2 stops19h 24mAmerican Airlines

Thu 23/1006:15ONT - LGW

2 stops18h 20mAmerican Airlines

Deal found 16/9£419

Wed 1/1012:00LHR - ONT

1 stop14h 54mBritish Airways

Mon 24/1115:19ONT - LHR

1 stop12h 56mBritish Airways

Deal found 15/9£391

Thu 30/1007:45LCY - ONT

2 stops18h 34mDelta

Thu 6/1107:05ONT - LCY

2 stops16h 10mDelta

Deal found 15/9£456

Wed 5/1105:45EDI - ONT

2 stops23h 35mVirgin Atlantic

Wed 19/1106:00ONT - EDI

2 stops33h 10mVirgin Atlantic

Deal found 16/9£465

Wed 1/1012:00LHR - ONT

1 stop14h 54mBritish Airways

Tue 25/1114:59ONT - LHR

1 stop12h 41mBritish Airways

Deal found 15/9£391

Thu 26/210:20EDI - ONT

2 stops21h 23mAmerican Airlines

Mon 2/315:05ONT - EDI

2 stops16h 10mAmerican Airlines

Deal found 15/9£457

Sat 4/1015:10LHR - ONT

1 stop15h 23mBritish Airways

Sat 18/1016:49ONT - LHR

1 stop12h 01mBritish Airways

Deal found 17/9£392

Thu 26/209:40LCY - ONT

2 stops20h 19mMultiple Airlines

Mon 2/305:40ONT - LCY

2 stops27h 00mMultiple Airlines

Deal found 17/9£525

Wed 22/1008:40LCY - ONT

2 stops22h 01mVirgin Atlantic

Tue 28/1013:15ONT - LCY

2 stops20h 20mVirgin Atlantic

Deal found 16/9£485

Wed 4/313:30MAN - ONT

1 stop30h 08mDelta

Sun 8/322:30ONT - MAN

2 stops28h 40mDelta

Deal found 15/9£489

Sat 28/219:40LGW - ONT

2 stops26h 04mIberia

Wed 4/311:05ONT - LGW

2 stops23h 55mIberia

Deal found 15/9£611

Wed 4/306:10MAN - ONT

2 stops22h 14mAmerican Airlines

Sun 8/310:57ONT - MAN

2 stops20h 03mAmerican Airlines

Deal found 15/9£462

Sat 22/1115:00LHR - ONT

1 stop16h 57mBritish Airways

Fri 5/1212:46ONT - LHR

1 stop13h 14mBritish Airways

Deal found 17/9£392

Mon 27/1017:20ABZ - ONT

2 stops35h 00mVirgin Atlantic

Sun 23/1111:45ONT - ABZ

2 stops16h 30mVirgin Atlantic

Deal found 16/9£490

Fri 31/1013:25MAN - ONT

1 stop28h 01mDelta

Fri 7/1106:00ONT - MAN

2 stops20h 10mDelta

Deal found 16/9£491

Mon 13/1008:45LCY - ONT

2 stops21h 45mMultiple Airlines

Mon 20/1007:02ONT - LCY

2 stops21h 28mMultiple Airlines

Deal found 15/9£556

Last-minute flights from United Kingdom to Ontario
Discover last-minute flight deals from United Kingdom to Ontario. Data last updated 18 September 2025 and is based on user searches.

Mon 22/915:10LHR - ONT

1 stop15h 23mBritish Airways

Wed 8/1014:51ONT - LHR

1 stop15h 34mBritish Airways

Deal found 15/9£391

Mon 22/917:25LHR - ONT

2 stops38h 17mVirgin Atlantic

Tue 7/1013:15ONT - LHR

2 stops15h 55mVirgin Atlantic

Deal found 15/9£393

Wed 24/909:55LHR - ONT

2 stops21h 47mVirgin Atlantic

Wed 1/1006:00ONT - LHR

1 stop24h 15mVirgin Atlantic

Deal found 16/9£399

Fri 26/913:25LHR - ONT

1 stop17h 15mVirgin Atlantic

Mon 6/1013:15ONT - LHR

1 stop12h 35mVirgin Atlantic

Deal found 16/9£389

Wed 1/1012:20LGW - ONT

2 stops40h 51mAmerican Airlines

Sun 5/1023:59ONT - LGW

2 stops24h 11mAmerican Airlines

Deal found 15/9£377

Wed 1/1010:30LHR - ONT

1 stop20h 03mBritish Airways

Wed 19/1116:47ONT - LHR

1 stop12h 28mBritish Airways

Deal found 15/9£391

Wed 1/1011:00LHR - ONT

1 stop18h 24mBritish Airways

Sat 22/1116:47ONT - LHR

1 stop12h 28mBritish Airways

Deal found 15/9£398

Thu 2/1012:00LHR - ONT

1 stop14h 54mBritish Airways

Tue 21/1008:15ONT - LHR

1 stop14h 10mBritish Airways

Deal found 17/9£392

Thu 30/1014:45LHR - ONT

1 stop14h 56mVirgin Atlantic

Thu 6/1107:35ONT - LHR

1 stop21h 15mVirgin Atlantic

Deal found 15/9£375

Thu 30/1010:05LHR - ONT

1 stop19h 13mBritish Airways

Thu 6/1114:59ONT - LHR

1 stop12h 41mBritish Airways

Deal found 15/9£390

Thu 30/1006:30LHR - ONT

2 stops19h 49mDelta

Thu 6/1107:35ONT - LHR

1 stop18h 55mDelta

Deal found 15/9£394

Fri 31/1010:45LHR - ONT

1 stop15h 34mKLM

Thu 13/1111:45ONT - LHR

1 stop13h 15mKLM

Deal found 17/9£397

One-way flights from United Kingdom to Ontario
Search for one-way flight options from United Kingdom to Ontario. Find affordable one-way fares based on user searches. Data last updated 18 September 2025.

Fri 31/1016:30LHR - ONT

1 stop24h 23mIberia

Deal found 15/9£246

Fri 31/1019:10LHR - ONT

2 stops25h 33mMultiple Airlines

Deal found 15/9£259

Wed 22/1020:50LGW - ONT

3 stops33h 05mMultiple Airlines

Deal found 16/9£295

Wed 21/106:15LHR - ONT

2 stops23h 47mBritish Airways

Deal found 15/9£311

Tue 11/1110:05LHR - ONT

1 stop16h 16mBritish Airways

Deal found 15/9£312

Mon 10/1112:30LGW - ONT

2 stops29h 27mAmerican Airlines

Deal found 14/9£312

Mon 23/215:00LHR - ONT

1 stop14h 57mBritish Airways

Deal found 16/9£313

Wed 4/315:00LHR - ONT

1 stop14h 57mBritish Airways

Deal found 16/9£314

Wed 3/1216:30LHR - ONT

1 stop29h 30mMultiple Airlines

Deal found 15/9£319

Thu 30/1017:10LGW - ONT

3 stops37h 40mMultiple Airlines

Deal found 15/9£319

Mon 26/119:40LGW - ONT

2 stops21h 53mIberia

Deal found 17/9£319

Tue 2/1210:45LHR - ONT

1 stop21h 14mVirgin Atlantic

Deal found 17/9£320

Cheapflights Fare Finder

Use the filters below to find and compare flights from the United Kingdom to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Thu 26/2

12:30-13:44

2 stops33h 14m

Ontario

Mon 2/3

20:04-07:30

2 stops27h 26m

£359

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Wed 1/10

12:20-21:11

2 stops40h 51m

Ontario

Sun 5/10

23:59-08:10

2 stops24h 11m

£377

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 1/10

10:30-22:33

1 stop20h 03m

Ontario

Wed 19/11

16:47-13:15

1 stop12h 28m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 16/11

16:30-23:57

1 stop15h 27m

Ontario

Tue 25/11

12:49-11:40

1 stop14h 51m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 15/11

11:45-21:11

1 stop17h 26m

Ontario

Tue 25/11

16:47-13:15

1 stop12h 28m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 1/10

12:00-18:54

1 stop14h 54m

Ontario

Mon 24/11

15:19-12:15

1 stop12h 56m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 1/10

12:00-18:54

1 stop14h 54m

Ontario

Tue 25/11

14:59-11:40

1 stop12h 41m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 4/10

15:10-22:33

1 stop15h 23m

Ontario

Sat 18/10

16:49-12:50

1 stop12h 01m

£392

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 22/11

15:00-23:57

1 stop16h 57m

Ontario

Fri 5/12

12:46-10:00

1 stop13h 14m

£392

LondonOntario

LCY - ONT

LCYONT

London City

Wed 8/10

10:00-22:41

2 stops20h 41m

Ontario

Wed 15/10

13:15-18:30

2 stops21h 15m

£408

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 60 results

...

Best time to book a flight from United Kingdom to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from United Kingdom with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from the United Kingdom to Ontario

What is the cheapest month to book a flight from United Kingdom to Ontario?

Currently, March is the cheapest month in which you can book a flight from United Kingdom to Ontario (average of £516). Flying from United Kingdom to Ontario in August is currently the most expensive (average of £827). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from GB to ONT?

When flying from United Kingdom to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Ontario

Read through reviews of airlines operating flights from the United Kingdom to Ontario, such as KLM, United Airlines, andVirgin Atlantic. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

KLM

7.8

Good

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

KLM

7.8

Good

1,386 reviews

KLM

7.8

Good

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

United Airlines

7.4

Good

8,926 reviews

KLM

7.8

Good

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Virgin Atlantic

7.4

Good

664 reviews

KLM

7.8

Good

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Lufthansa

6.8

Okay

7,409 reviews

KLM

7.8

Good

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

British Airways

6.7

Okay

7,367 reviews

KLM

7.8

Good

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Related info for your journey

What airport do you fly into for flights to Ontario from United Kingdom?
Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Ontario from United Kingdom.
How long is the flight from United Kingdom to Ontario?
For as low as £391, American Airlines can have you in Ontario from United Kingdom in 20h 03m. The distance from United Kingdom to Ontario is about 5407 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines to fly from United Kingdom to Ontario one-way?
The cheapet airlines for a one-way flight from United Kingdom to Ontario are American Airlines (£312), British Airways (£322), and Delta (£332).
What are the most popular routes from United Kingdom to Ontario?
While some choose either Manchester - Ontario or London Gatwick - Ontario, London Heathrow - Ontario is the most popular route from United Kingdom to Ontario.
Can I find deals for flights from United Kingdom to Ontario that include hotel bookings?
Yes. In addition to deals on United Kingdom to Ontario flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from United Kingdom to Ontario?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from United Kingdom to Ontario.
Can I find deals for business class flights from United Kingdom to Ontario?
Yes. Cheapflights offers flight deals from United Kingdom to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from United Kingdom to Ontario?
Currently, March is the cheapest month in which you can book a flight from United Kingdom to Ontario (average of £516). Flying from United Kingdom to Ontario in August is currently the most expensive (average of £827). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from United Kingdom to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Finnair	Cheapest£275	Average£431	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
British Airways	Cheapest£379	Average£516	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£380	Average£636	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
KLM	Cheapest£388	Average£555	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Virgin Atlantic	Cheapest£402	Average£501	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Lufthansa	Cheapest£424	Average£567	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights

Fly with Cheapflights

How does Cheapflights help users find flights from United Kingdom to Ontario?

Deals for United Kingdom to Ontario flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from United Kingdom to Ontario?

Cheapflights simply makes it quick and affordable to book flights from United Kingdom to Ontario by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from United Kingdom to Ontario with no change fees?

Need flexible booking options for your flight to Ontario from United Kingdom? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from United Kingdom to Ontario become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Ontario from United Kingdom today and book when prices fit your budget.

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Our users can plan ahead with confidence and find flights with no change fees

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from the United Kingdom to Ontario from £246

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 31/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from United Kingdom to Ontario

Keep the following information in mind while searching for United Kingdom to Ontario flight deals. Data was last updated 18 September 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from United Kingdom to Ontario

Cheapest flights from United Kingdom to OntarioExplore the most affordable flight options available from United Kingdom to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Explore the most affordable flight options available from United Kingdom to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from the United Kingdom to Ontario that are best for you.

Best time to book a flight from United Kingdom to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from United Kingdom with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from the United Kingdom to Ontario

What is the cheapest month to book a flight from United Kingdom to Ontario?

What is the cheapest time of day to fly from GB to ONT?

Find hourly flight availability from United Kingdom to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 September 2025.

Reviews of airlines servicing Ontario

Read through reviews of airlines operating flights from the United Kingdom to Ontario, such as KLM, United Airlines, andVirgin Atlantic. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from United Kingdom to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Ontario from United Kingdom?

How long is the flight from United Kingdom to Ontario?

What are the cheapest airlines to fly from United Kingdom to Ontario one-way?

What are the most popular routes from United Kingdom to Ontario?

Can I find deals for flights from United Kingdom to Ontario that include hotel bookings?

How can I find direct flights from United Kingdom to Ontario?

Can I find deals for business class flights from United Kingdom to Ontario?

What is the cheapest month to book a flight from United Kingdom to Ontario?

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Alternative routes for United Kingdom to Ontario

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Top 6 airlines flying from United Kingdom to Ontario

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Cheapest flights from United Kingdom to Ontario
Explore the most affordable flight options available from United Kingdom to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.