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 Iberia (£471), Lufthansa (£477), and British Airways (£551).

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

While some choose either Manchester - Ontario or Edinburgh Turnhouse - 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 Lufthansa.

How far in advance should I book a flight from United Kingdom to Ontario?

Travelers have found it’s best to book a flight 58 days in advance to save up to 20% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 58 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from United Kingdom to Ontario 1-2 weeks in advance for as low as £490, or £698 for flights within the next 24 hours.

What is the cheapest month to fly from United Kingdom to Ontario?

Flights from United Kingdom to Ontario lean towards being more expensive in August. Prices are generally better when you fly from United Kingdom to Ontario in September, with the cheapest ticket starting at £292.

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.

£734+ Flights from the United Kingdom to Ontario

Cheap flight deals from United Kingdom to Ontario

Round-trip from	£397
One-way from	£391
Popular in	August
Cheapest in	September
Average price	£466

Lufthansa
1/5-14/5
3 total stops
32h 35m total
United Kingdom to Ontario

Search Deals

20/5
2 total stops
27h 54m total
United Kingdom to Ontario

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (£43 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).

Search Deals

Average for round-trip flights in February 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 21 February 2025.

Thu 1/509:30LHR - ONT

2 stops20h 30mLufthansa

Wed 14/516:15ONT - LHR

1 stop12h 05mLufthansa

Deal found 21/2£397

Thu 20/309:30LHR - ONT

2 stops20h 15mUnited Airlines

Thu 27/306:00ONT - LHR

1 stop18h 30mUnited Airlines

Deal found 19/2£400

Sat 8/314:30LHR - ONT

1 stop16h 22mKLM

Wed 12/313:30ONT - LHR

1 stop13h 30mKLM

Deal found 20/2£408

Fri 25/413:25LHR - ONT

1 stop17h 17mVirgin Atlantic

Wed 30/414:35ONT - LHR

1 stop15h 40mVirgin Atlantic

Deal found 20/2£421

Tue 4/311:10LHR - ONT

2 stops17h 42mMultiple Airlines

Tue 11/313:40ONT - LHR

2 stops15h 10mMultiple Airlines

Deal found 20/2£433

Mon 10/310:40LHR - ONT

1 stop20h 14mBritish Airways

Wed 26/310:57ONT - LHR

1 stop13h 23mBritish Airways

Deal found 20/2£436

Thu 27/210:45LHR - ONT

1 stop13h 43mDelta

Wed 12/313:30ONT - LHR

1 stop13h 30mDelta

Deal found 20/2£438

Fri 25/407:45LCY - ONT

2 stops22h 57mDelta

Wed 30/413:20ONT - LCY

2 stops19h 20mDelta

Deal found 20/2£472

Wed 23/411:25EDI - ONT

2 stops18h 33mBritish Airways

Tue 29/412:50ONT - EDI

2 stops17h 50mBritish Airways

Deal found 20/2£478

Wed 23/409:00EDI - ONT

1 stop21h 36mDelta

Tue 29/411:45ONT - EDI

2 stops20h 50mDelta

Deal found 20/2£483

Thu 13/308:25EDI - ONT

3 stops45h 20mUnited Airlines

Mon 31/315:55ONT - EDI

2 stops34h 40mUnited Airlines

Deal found 20/2£497

Sat 8/308:50MAN - ONT

2 stops21h 41mBritish Airways

Thu 27/307:00ONT - MAN

2 stops19h 10mBritish Airways

Deal found 20/2£500

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 21 February 2025.

Thu 1/509:30LHR - ONT

2 stops20h 30mLufthansa

Wed 14/516:15ONT - LHR

1 stop12h 05mLufthansa

Deal found 21/2£397

Thu 20/309:30LHR - ONT

2 stops20h 15mUnited Airlines

Thu 27/306:00ONT - LHR

1 stop18h 30mUnited Airlines

Deal found 19/2£400

Sat 8/314:30LHR - ONT

1 stop16h 22mKLM

Wed 12/313:30ONT - LHR

1 stop13h 30mKLM

Deal found 20/2£408

Fri 25/413:25LHR - ONT

1 stop17h 17mVirgin Atlantic

Wed 30/414:35ONT - LHR

1 stop15h 40mVirgin Atlantic

Deal found 20/2£421

Tue 4/311:10LHR - ONT

2 stops17h 42mMultiple Airlines

Tue 11/313:40ONT - LHR

2 stops15h 10mMultiple Airlines

Deal found 20/2£433

Mon 10/310:40LHR - ONT

1 stop20h 14mBritish Airways

Wed 26/310:57ONT - LHR

1 stop13h 23mBritish Airways

Deal found 20/2£436

Fri 25/407:45LCY - ONT

2 stops22h 57mDelta

Wed 30/413:20ONT - LCY

2 stops19h 20mDelta

Deal found 20/2£472

Fri 25/411:45LGW - ONT

2 stops20h 05mIberia

Wed 30/412:50ONT - LGW

2 stops23h 10mIberia

Deal found 20/2£588

Thu 1/508:15LHR - ONT

1 stop21h 07mJetBlue

Fri 9/522:40ONT - LHR

1 stop14h 05mJetBlue

Deal found 20/2£675

Sun 6/715:40LHR - ONT

1 stop13h 55mAmerican Airlines

Mon 21/717:06ONT - LHR

1 stop11h 44mAmerican Airlines

Deal found 20/2£939

Mon 10/314:50LHR - ONT

3 stops32h 52mWestJet

Wed 26/311:42ONT - LHR

2 stops18h 08mWestJet

Deal found 20/2£940

Wed 23/411:25EDI - ONT

2 stops18h 33mBritish Airways

Tue 29/412:50ONT - EDI

2 stops17h 50mBritish Airways

Deal found 20/2£478

Last-minute flights from United Kingdom to Ontario
Discover last-minute flight deals from United Kingdom to Ontario. Data last updated 21 February 2025 and is based on user searches.

Wed 26/209:25EDI - ONT

2 stops19h 27mUnited Airlines

Wed 5/306:00ONT - EDI

2 stops17h 55mUnited Airlines

Deal found 19/2£848

Thu 27/212:00LGW - ONT

1 stop16h 35mMultiple Airlines

Thu 6/310:44ONT - LGW

1 stop15h 51mMultiple Airlines

Deal found 20/2£646

Thu 27/213:50LHR - ONT

1 stop18h 03mIberia

Sat 1/314:54ONT - LHR

1 stop31h 26mIberia

Deal found 20/2£769

Thu 27/210:45LHR - ONT

1 stop13h 43mDelta

Wed 12/313:30ONT - LHR

1 stop13h 30mDelta

Deal found 20/2£438

Fri 28/214:30LHR - ONT

1 stop16h 22mKLM

Wed 5/313:10ONT - LHR

1 stop13h 25mKLM

Deal found 20/2£558

Fri 28/212:45LHR - ONT

1 stop17h 14mLufthansa

Fri 14/306:00ONT - LHR

1 stop18h 25mLufthansa

Deal found 20/2£569

Fri 28/209:00MAN - ONT

2 stops21h 16mBritish Airways

Mon 3/306:59ONT - MAN

2 stops18h 01mBritish Airways

Deal found 20/2£636

Fri 28/209:40NCL - ONT

2 stops20h 36mMultiple Airlines

Fri 7/311:57ONT - NCL

2 stops20h 28mMultiple Airlines

Deal found 21/2£791

Fri 28/209:50EDI - ONT

2 stops20h 26mBritish Airways

Thu 6/314:54ONT - EDI

2 stops18h 46mBritish Airways

Deal found 20/2£1,025

Fri 28/212:45LHR - ONT

1 stop17h 14mLufthansa

Fri 7/306:00ONT - LHR

1 stop17h 25mLufthansa

Deal found 20/2£417

Sat 1/311:10LHR - ONT

2 stops17h 42mMultiple Airlines

Sat 8/310:38ONT - LHR

2 stops15h 32mMultiple Airlines

Deal found 20/2£877

Sun 2/313:45LHR - ONT

1 stop14h 55mUnited Airlines

Sun 30/315:55ONT - LHR

1 stop14h 15mUnited Airlines

Deal found 20/2£573

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 21 February 2025.

Tue 20/514:00LGW - ONT

2 stops27h 54mMultiple Airlines

Deal found 21/2£391

Tue 20/514:10LHR - ONT

2 stops27h 44mMultiple Airlines

Deal found 21/2£441

Tue 18/314:10LHR - ONT

1 stop16h 44mIberia

Deal found 20/2£471

Thu 27/212:45LHR - ONT

1 stop17h 14mLufthansa

Deal found 20/2£477

Mon 14/715:40LHR - ONT

1 stop13h 55mBritish Airways

Deal found 20/2£551

Wed 30/408:15LHR - ONT

1 stop21h 07mJetBlue

Deal found 21/2£589

Tue 27/516:25LHR - ONT

1 stop15h 19mFinnair

Deal found 20/2£620

Wed 16/714:10LHR - ONT

2 stops16h 31mWestJet

Deal found 20/2£658

Mon 3/321:40LHR - ONT

2 stops31h 20mAvianca

Deal found 20/2£716

Mon 14/708:45LCY - ONT

2 stops20h 37mLufthansa

Deal found 20/2£752

Tue 5/812:30EDI - ONT

2 stops18h 57mBritish Airways

Deal found 20/2£816

Sun 11/513:05MAN - ONT

2 stops18h 53mMultiple Airlines

Deal found 21/2£824

Find flights from United Kingdom to Ontario within your budget

Fly from

Fly to

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 1/5

09:30-22:00

2 stops20h 30m

Ontario

Wed 14/5

16:15-12:20

1 stop12h 05m

£397

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 20/3

06:30-18:04

2 stops18h 34m

Ontario

Thu 27/3

05:05-07:10

2 stops19h 05m

£400

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 8/3

14:30-22:52

1 stop16h 22m

Ontario

Wed 12/3

13:30-10:00

1 stop13h 30m

£408

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 25/4

13:25-22:42

1 stop17h 17m

Ontario

Wed 30/4

14:35-14:15

1 stop15h 40m

£421

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 4/3

11:10-20:52

2 stops17h 42m

Ontario

Tue 11/3

13:40-11:50

2 stops15h 10m

£433

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 10/3

10:40-23:54

1 stop20h 14m

Ontario

Wed 26/3

10:57-07:20

1 stop13h 23m

£436

LondonOntario

LCY - ONT

LCYONT

London City

Fri 25/4

07:45-22:42

2 stops22h 57m

Ontario

Wed 30/4

13:20-16:40

2 stops19h 20m

£472

EdinburghOntario

EDI - ONT

EDIONT

Edinburgh Turnhouse

Wed 23/4

11:25-21:58

2 stops18h 33m

Ontario

Tue 29/4

12:50-14:40

2 stops17h 50m

£478

EdinburghOntario

EDI - ONT

EDIONT

Edinburgh Turnhouse

Wed 23/4

09:00-22:36

1 stop21h 36m

Ontario

Tue 29/4

11:45-16:35

2 stops20h 50m

£483

EdinburghOntario

EDI - ONT

EDIONT

Edinburgh Turnhouse

Thu 13/3

08:25-22:45

3 stops45h 20m

Ontario

Mon 31/3

15:55-10:35

2 stops34h 40m

£497

Flights are sorted by cheapest return flights first.

Deals found on 21/2

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.

Travel insights for flights from United Kingdom to Ontario

Get recent, data-driven insights about flights from United Kingdom to Ontario including ideal travel times, pricing trends, and more.

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.

Rainfall in Ontario by month

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.

Temperature in Ontario by month

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).

Reviews of airlines servicing Ontario

To help decide which airline to fly from United Kingdom to Ontario, see what other customers have to say about Delta, KLM and Finnair. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

8,212 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

8.0

Very Good

8,212 reviews

Delta

8.0

Very Good

8,212 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

KLM

7.8

Good

1,333 reviews

Delta

8.0

Very Good

8,212 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

Finnair

7.6

Good

1,273 reviews

Delta

8.0

Very Good

8,212 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

7.5

Good

654 reviews

Delta

8.0

Very Good

8,212 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

Air France

7.4

Good

1,449 reviews

Delta

8.0

Very Good

8,212 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.
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 Iberia (£471), Lufthansa (£477), and British Airways (£551).
What are the most popular routes from United Kingdom to Ontario?
While some choose either Manchester - Ontario or Edinburgh Turnhouse - 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

Alternative routes for United Kingdom to Ontario

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Top 6 airlines flying from United Kingdom to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	Cheapest£430	Average£543	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest£433	Average£628	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Finnair	Cheapest£434	Average£519	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Lufthansa	Cheapest£459	Average£554	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£523	Average£687	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
KLM	Cheapest£543	Average£718	FlexibilityNo cancel fee	On-time75%	Search KLM 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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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 £391

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 20/5. 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 21 February 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 21 February 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 21 February 2025.

Find flights from United Kingdom to Ontario within your budget

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.

Travel insights for flights from United Kingdom to Ontario

Get recent, data-driven insights about flights from United Kingdom to Ontario including ideal travel times, pricing trends, and more.

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 21 February 2025.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

Reviews of airlines servicing Ontario

To help decide which airline to fly from United Kingdom to Ontario, see what other customers have to say about Delta, KLM and Finnair. Users can see the overall rating for each airline as well as how each is rated in terms of 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?

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?

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.

Top 6 airlines flying from United Kingdom to Ontario

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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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 21 February 2025.