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Cheap flights from London to Ontario from £278

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 23/1. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ONT
25 Nov — 2 Dec1
1 adult

The best prices from London to Ontario are usually found in April or February, booked 58 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Find flights from London to Ontario within your budget

Customise your flight search to find flights from London to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 953,013 searches. Data last updated 20 November 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 4/12

20:00-22:13

2 stops34h 13m

Ontario

Tue 10/12

06:05-09:40

1 stop19h 35m

£443

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 4/12

06:20-22:45

2 stops24h 25m

Ontario

Tue 10/12

07:10-06:20

1 stop15h 10m

£446

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 4/12

13:15-16:45

1 stop35h 30m

Ontario

Tue 10/12

17:35-11:10

1 stop33h 35m

£452

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Mon 27/1

12:30-18:37

2 stops38h 07m

Ontario

Mon 3/2

06:00-18:50

2 stops28h 50m

£473

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Sun 12/1

12:00-19:56

1 stop15h 56m

Ontario

Mon 27/1

21:36-10:35

1 stop28h 59m

£476

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 25/3

10:05-18:04

1 stop14h 59m

Ontario

Wed 2/4

13:00-09:40

1 stop12h 40m

£485

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 15/1

13:50-22:16

1 stop16h 26m

Ontario

Wed 22/1

14:44-12:05

1 stop13h 21m

£489

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 29/1

15:50-22:32

1 stop14h 42m

Ontario

Mon 3/2

13:00-10:35

1 stop13h 35m

£489

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 5/5

14:50-20:17

1 stop13h 27m

Ontario

Mon 12/5

13:00-09:40

1 stop12h 40m

£500

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Mon 5/5

10:50-23:35

2 stops20h 45m

Ontario

Mon 12/5

15:00-20:00

2 stops21h 00m

£520

Flights are sorted by cheapest return flights first.

Deals found on 20/11

Showing 1-10 of 36 results
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Cheap flight deals from London to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 20 November 2024.

Round-trip from

£443

One-way from

£278

Popular in

August

Cheapest in

April
British Airways
  • British Airways
  • 4/12-10/12
  • 3 total stops
  • 53h 48m total
  • London to Ontario
23/1
  • 23/1
  • 1 total stop
  • 31h 32m total
  • London to Ontario
High demand for flights, 36% potential price rise
Best time to find cheap flights, 18% potential price drop

Find flight deals from London to Ontario

Cheapest flights from London to Ontario
Explore the most affordable flight options available from London to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 November 2024.

Wed 4/1220:00LHR - ONT
2 stops34h 13mMultiple Airlines
Tue 10/1206:05ONT - LHR
1 stop19h 35mMultiple Airlines
Deal found 20/11£443
Wed 4/1206:20LHR - ONT
2 stops24h 25mDelta
Tue 10/1207:10ONT - LHR
1 stop15h 10mDelta
Deal found 19/11£446
Wed 4/1213:15LHR - ONT
1 stop35h 30mVirgin Atlantic
Tue 10/1217:35ONT - LHR
1 stop33h 35mVirgin Atlantic
Deal found 19/11£452
Thu 5/1212:00LGW - ONT
1 stop15h 59mMultiple Airlines
Sun 8/1208:04ONT - LGW
1 stop18h 31mMultiple Airlines
Deal found 20/11£484
Tue 10/1212:50LHR - ONT
1 stop16h 52mLufthansa
Wed 15/105:10ONT - LHR
1 stop20h 30mLufthansa
Deal found 19/11£488
Tue 3/1211:10LHR - ONT
2 stops20h 48mUnited Airlines
Tue 10/1206:10ONT - LHR
2 stops15h 45mUnited Airlines
Deal found 19/11£504
Tue 10/1214:30LHR - ONT
1 stop16h 32mKLM
Thu 23/113:00ONT - LHR
1 stop13h 35mKLM
Deal found 19/11£516
Fri 6/1213:50LHR - ONT
1 stop16h 23mIberia
Tue 10/1210:42ONT - LHR
1 stop12h 38mIberia
Deal found 20/11£548
Wed 11/1208:20LHR - ONT
2 stops18h 07mAmerican Airlines
Mon 23/1216:25ONT - LHR
1 stop12h 55mAmerican Airlines
Deal found 20/11£552
Tue 10/1209:25LHR - ONT
1 stop17h 13mBritish Airways
Mon 23/1223:59ONT - LHR
1 stop28h 06mBritish Airways
Deal found 19/11£553
Mon 9/1214:30LHR - ONT
1 stop15h 33mFinnair
Fri 13/1210:41ONT - LHR
1 stop12h 39mFinnair
Deal found 20/11£630
Wed 4/1217:00LCY - ONT
2 stops33h 38mBritish Airways
Tue 10/1207:16ONT - LCY
2 stops19h 34mBritish Airways
Deal found 20/11£635

Best time to book a flight from London to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from London 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 London to Ontario

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

How far ahead should I book a flight from London to Ontario?

Use this chart to determine the optimal time to book a return flight from London to Ontario. Price data was last updated on 15 November 2024.

To ensure you get the cheapest price possible for a flight from London to Ontario, you should look to book at least 58 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, February is the cheapest month in which you can book a flight from London to Ontario (average of £514). Flying from London 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 LON to ONT?

Find hourly flight availability from London 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 20 November 2024.

It’s optimal to fly from London to Ontario in the evening. By choosing this option you can save up to 14% on the cost of your flight, compared to a flight at midday.

Rainfall in Ontario by month

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

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

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 20 November 2024.
Read reviews from past customers who have flown Delta, Lufthansa and Finnair from London to Ontario. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very Good
8,758 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Reviews

1 / 10

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

8.0
Very Good
8,758 reviews
8.0
Very Good
8,758 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Reviews

1 / 10

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

7.8
Good
1,350 reviews
8.0
Very Good
8,758 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Reviews

1 / 10

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

7.7
Good
1,300 reviews
8.0
Very Good
8,758 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Reviews

1 / 10

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

7.5
Good
663 reviews
8.0
Very Good
8,758 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Reviews

1 / 10

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

7.4
Good
9,172 reviews
8.0
Very Good
8,758 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Reviews

1 / 10

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

Related info for your journey

Find useful and relevant information for your journey from London 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 London?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from London. On average, Ontario has 0 inbound flights from London per day from 5 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

  • What are the cheapest airlines flying from London to Ontario round-trip?

    According to our current data, Delta (£446), Virgin Atlantic (£452), and Finnair (£473) offers the cheapest pricing from London to Ontario. You may be able to fly from London to Ontario for 21% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from London to Ontario one-way?

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at £524. Air Canada flights start at £525 while deals on United Airlines start at £531 one-way.

  • What are the most popular routes from London to Ontario?

  • Can I find deals for flights from London to Ontario that include hotel bookings?

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

  • How can I find direct flights from London to Ontario?

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

  • Can I find deals for business class flights from London to Ontario?

    Yes. Cheapflights offers flight deals from London 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 London to Ontario?

    Currently, February is the cheapest month in which you can book a flight from London to Ontario (average of £514). Flying from London 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

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Alternative routes for London to Ontario

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

Top 5 airlines flying from London to Ontario

Discover the top 5 airlines that operate flights from London to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 953,013 searches. Data last updated 20 November 2024.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£392Average£533FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£410Average£620FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£433Average£517FlexibilityNo cancel feeOn-time76%
Search Finnair flights
LufthansaCheapest£479Average£538FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£531Average£742FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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 London to Ontario?

When you search for this flight from London to Ontario, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights helps you find that perfect flight to Ontario from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from London to Ontario, users can toggle the no change fees filter when performing a flight search.

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

Yes, Cheapflights offers price alerts on London to Ontario flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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