How long is the flight from United Kingdom to Ontario?

For as low as £487, Delta can have you in Ontario from United Kingdom in 16h 22m. 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.

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 London Gatwick - Ontario or Manchester - 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: British Airways, Virgin Atlantic or United Airlines.

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.

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.

£263+ Cheap Flights from the United Kingdom to Ontario

Cheap flight deals from United Kingdom to Ontario

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 25 August 2026.

Wed 4/1109:00 -

2 stops19h 15m

Fri 4/1207:00 -

1 stop14h 55m

Deal found 24/8£419

Thu 22/1007:30 -

2 stops21h 01m

Sun 25/1007:00 -

1 stop15h 55m

Deal found 24/8£424

Mon 2/1110:00 -

2 stops38h 23m

Thu 12/1111:57 -

1 stop14h 43m

Deal found 20/8£441

Sat 21/1116:25 -

2 stops38h 35m

Sun 29/1107:04 -

1 stop19h 36m

Deal found 21/8£442

Fri 20/1117:50 -

2 stops37h 10m

Sat 28/1106:00 -

1 stop20h 00m

Deal found 23/8£443

Thu 22/1011:40 -

1 stop19h 03m

Sat 31/1007:07 -

1 stop17h 43m

Deal found 20/8£444

Wed 4/1120:25 -

2 stops33h 46m

Sat 7/1112:16 -

1 stop34h 09m

Deal found 23/8£444

Tue 27/1012:20 -

1 stop35h 52m

Mon 2/1107:07 -

1 stop20h 33m

Deal found 21/8£445

Wed 23/1210:45 -

1 stop21h 03m

Wed 30/1206:00 -

1 stop20h 00m

Deal found 21/8£446

Thu 24/914:50 -

1 stop14h 08m

Thu 1/1013:24 -

1 stop12h 16m

Deal found 25/8£447

Wed 25/1118:55 -

2 stops31h 38m

Sat 5/1213:25 -

2 stops43h 10m

Deal found 21/8£481

Wed 4/1110:00 -

2 stops20h 43m

Sat 7/1112:16 -

2 stops19h 29m

Deal found 23/8£486

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 25 August 2026.

Thu 22/1011:45 -

2 stops18h 58m

Tue 27/1009:45 -

2 stops17h 45m

Deal found 21/8£456

Wed 25/1118:55 -

2 stops31h 38m

Sat 5/1213:25 -

2 stops43h 10m

Deal found 21/8£481

Wed 18/1110:25 -

1 stop16h 22m

Thu 19/1105:00 -

2 stops19h 25m

Deal found 22/8£487

Thu 5/1114:45 -

1 stop16h 21m

Thu 19/1112:02 -

1 stop16h 18m

Deal found 24/8£505

Wed 14/1008:25 -

2 stops22h 18m

Mon 19/1011:56 -

2 stops21h 24m

Deal found 24/8£508

Thu 5/1109:35 -

2 stops17h 34m

Fri 4/1214:22 -

2 stops17h 38m

Deal found 20/8£626

Sat 3/1010:30 -

2 stops17h 39m

Sat 7/1114:22 -

2 stops17h 18m

Deal found 22/8£650

Sat 5/911:25 -

2 stops19h 34m

Fri 18/906:00 -

2 stops18h 30m

Deal found 21/8£655

Wed 9/914:00 -

2 stops38h 53m

Mon 21/913:56 -

2 stops36h 14m

Deal found 24/8£659

Mon 2/1119:15 -

2 stops22h 25m

Thu 12/1106:00 -

2 stops18h 50m

Deal found 20/8£732

Wed 4/1111:55 -

2 stops17h 45m

Sat 5/1211:20 -

2 stops15h 35m

Deal found 20/8£763

Fri 11/914:10 -

1 stop16h 49m

Fri 18/913:56 -

1 stop13h 14m

Deal found 20/8£488

Wed 23/908:25 -

2 stops23h 22m

Wed 30/913:04 -

2 stops20h 16m

Deal found 24/8£501

Thu 1/1014:50 -

1 stop14h 08m

Wed 21/1013:24 -

1 stop12h 16m

Deal found 22/8£488

Thu 1/1017:35 -

2 stops35h 22m

Wed 7/1022:42 -

2 stops33h 53m

Deal found 20/8£1,099

Thu 17/917:00 -

1 stop14h 24m

Tue 13/1014:13 -

1 stop16h 52m

Deal found 20/8£583

Tue 15/914:50 -

1 stop14h 03m

Mon 30/1105:00 -

1 stop20h 40m

Deal found 22/8£490

Wed 7/1009:25 -

2 stops21h 18m

Wed 14/1017:03 -

2 stops15h 47m

Deal found 24/8£618

Mon 5/1006:00 -

2 stops24h 40m

Fri 16/1017:03 -

2 stops15h 12m

Deal found 20/8£625

Tue 6/1005:50 -

2 stops26h 02m

Wed 4/1114:22 -

2 stops17h 08m

Deal found 22/8£644

Wed 7/1013:10 -

2 stops18h 45m

Thu 5/1107:07 -

2 stops17h 33m

Deal found 22/8£635

Thu 5/1108:50 -

2 stops18h 19m

Tue 24/1114:22 -

2 stops18h 08m

Deal found 20/8£648

Wed 9/910:35 -

1 stop15h 41m

Thu 10/913:18 -

1 stop12h 22m

Deal found 24/8£556

Sun 20/910:35 -

2 stops44h 05m

Sun 27/906:00 -

2 stops20h 00m

Deal found 21/8£678

Fri 2/1007:55 -

2 stops33h 34m

Fri 9/1023:59 -

2 stops35h 01m

Deal found 21/8£649

Sun 4/1015:40 -

2 stops38h 35m

Sat 17/1014:13 -

2 stops16h 22m

Deal found 20/8£816

Thu 8/1014:50 -

1 stop14h 08m

Fri 16/1013:24 -

1 stop15h 01m

Deal found 20/8£570

Fri 6/1106:00 -

2 stops23h 32m

Tue 10/1112:42 -

2 stops19h 08m

Deal found 20/8£655

Sat 5/906:15 -

2 stops18h 09m

Wed 16/911:54 -

2 stops20h 41m

Deal found 21/8£735

Mon 18/114:45 -

1 stop32h 35m

Sat 23/117:57 -

2 stops34h 23m

Deal found 23/8£812

Find flight deals from United Kingdom to Ontario

Round-trip from	£419
One-way from	£263
Popular in	December
Cheapest in	February
Average price	£524

United Airlines
4/11-4/12
3 total stops
34h 10m total
United Kingdom to Ontario

Search Deals

28/9
3 total stops
37h 36m total
United Kingdom to Ontario

Search Deals

Highest demand for flights based on searches. 2% potential increase in price (£8 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (£5 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

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

Cheapest return flight

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 22/10

11:45-22:43

2 stops18h 58m

Ontario

Tue 27/10

09:45-10:30

2 stops17h 45m

£456

LondonOntario

LCY London City - ONT Ontario

LCYONT

London City

Wed 25/11

18:55-18:33

2 stops31h 38m

Ontario

Sat 5/12

13:25-16:35

2 stops43h 10m

£481

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Wed 18/11

10:25-18:47

1 stop16h 22m

Ontario

Thu 19/11

05:00-08:25

2 stops19h 25m

£487

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Fri 11/9

14:10-22:59

1 stop16h 49m

Ontario

Fri 18/9

13:56-11:10

1 stop13h 14m

£488

Fastest return journey

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 1/10

14:50-20:58

1 stop14h 08m

Ontario

Wed 21/10

13:24-09:40

1 stop12h 16m

£488

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Tue 15/9

14:50-20:53

1 stop14h 03m

Ontario

Mon 30/11

05:00-09:40

1 stop20h 40m

£490

LondonOntario

LCY London City - ONT Ontario

LCYONT

London City

Wed 23/9

08:25-23:47

2 stops23h 22m

Ontario

Wed 30/9

13:04-17:20

2 stops20h 16m

£501

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 5/11

14:45-23:06

1 stop16h 21m

Ontario

Thu 19/11

12:02-12:20

1 stop16h 18m

£505

LondonOntario

LCY London City - ONT Ontario

LCYONT

London City

Wed 14/10

08:25-22:43

2 stops22h 18m

Ontario

Mon 19/10

11:56-17:20

2 stops21h 24m

£508

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Wed 9/9

10:35-18:16

1 stop15h 41m

Ontario

Thu 10/9

13:18-09:40

1 stop12h 22m

£556

Flights are sorted by cheapest return flights first.

Deals found on 24/8

Showing 1-10 of 60 resultsSorted by cheapest first

...

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.

LHR-ONT

LCY-ONT

GLA-ONT

MAN-ONT

LGW-ONT

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

GB0-ONT

LHR-ONT

LCY-ONT

GLA-ONT

MAN-ONT

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

Currently, January is the cheapest month in which you can book a flight from United Kingdom to Ontario (average of £405). Flying from United Kingdom to Ontario in June is currently the most expensive (average of £647). 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.

Reviews of airlines servicing Ontario

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

Delta

7.8

Good

8,530 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

7.8

Good

8,530 reviews

Delta

7.8

Good

8,530 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines

7.4

Good

10,121 reviews

Delta

7.8

Good

8,530 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Virgin Atlantic

7.4

Good

695 reviews

Delta

7.8

Good

8,530 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

British Airways

6.7

Okay

8,188 reviews

Delta

7.8

Good

8,530 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 £487, Delta can have you in Ontario from United Kingdom in 16h 22m. 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 most popular routes from United Kingdom to Ontario?
While some choose either London Gatwick - Ontario or Manchester - 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, January is the cheapest month in which you can book a flight from United Kingdom to Ontario (average of £405). Flying from United Kingdom to Ontario in June is currently the most expensive (average of £647). 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

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Top 3 airlines flying from United Kingdom to Ontario

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest£364	Average£553	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Virgin Atlantic	Cheapest£368	Average£486	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest£382	Average£586	FlexibilityNo cancel fee	On-time70%	Search British Airways flights

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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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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 £263

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 28/9. 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

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 25 August 2026.

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 25 August 2026.

Best flights from United Kingdom to OntarioDiscover 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 25 August 2026.

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 25 August 2026.

Last-minute flights from United Kingdom to OntarioDiscover last-minute flight deals from United Kingdom to Ontario. Data last updated 25 August 2026 and is based on user searches.

Discover last-minute flight deals from United Kingdom to Ontario. Data last updated 25 August 2026 and is based on user searches.

One-way flights from United Kingdom to OntarioSearch for one-way flight options from United Kingdom to Ontario. Find affordable one-way fares based on user searches. Data last updated 25 August 2026.

Search for one-way flight options from United Kingdom to Ontario. Find affordable one-way fares based on user searches. Data last updated 25 August 2026.

Find flight deals from United Kingdom to Ontario

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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

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

Reviews of airlines servicing Ontario

Read through reviews of airlines operating flights from the United Kingdom to Ontario, such as Delta,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

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 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?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for United Kingdom to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Ontario by adding a car hire and/or hotel booking to your travel itinerary.

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Search flights from United Kingdom to Ontario by cabin class

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Other flights to Ontario

Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 25 August 2026.

United Kingdom and Ontario flights

Browse other United Kingdom and Ontario flight options. Last updated on 25 August 2026.

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United Kingdom to Ontario flights

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Top 3 airlines flying from United Kingdom to Ontario

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

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

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

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

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Travel Smart

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 25 August 2026.

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 25 August 2026.

Last-minute flights from United Kingdom to Ontario
Discover last-minute flight deals from United Kingdom to Ontario. Data last updated 25 August 2026 and is based on user searches.

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 25 August 2026.