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Ontario

$460+ Cheap flights from London (LON) to Ontario (ONT)

LON — ONT
Nov 8 — Nov 151
Sun 11/8
Sun 11/15
1 adult, Economy
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Cheap flight deals from London to Ontario

Cheapest flights from London to Ontario

Thu 10/292:45 pm -
1 stop26h 32m
Tue 11/312:02 pm -
1 stop16h 18m
Deal found 10/9$553
Fri 11/62:45 pm -
1 stop16h 21m
Fri 11/1312:02 pm -
1 stop16h 18m
Deal found 10/9$554
Mon 11/22:45 pm -
1 stop16h 21m
Fri 11/1312:02 pm -
1 stop16h 18m
Deal found 10/6$556
Fri 11/62:45 pm -
1 stop16h 21m
Sun 11/2211:55 am -
1 stop16h 25m
Deal found 10/8$557
Wed 10/145:00 pm -
1 stop28h 16m
Wed 10/282:13 pm -
1 stop15h 07m
Deal found 10/6$560
Tue 10/135:00 pm -
1 stop25h 17m
Sun 10/186:02 am -
1 stop25h 03m
Deal found 10/6$561
Tue 10/135:00 pm -
1 stop25h 17m
Sat 10/2411:13 am -
1 stop18h 07m
Deal found 10/5$562
Wed 10/145:00 pm -
1 stop28h 16m
Thu 10/222:13 pm -
1 stop16h 52m
Deal found 10/6$565
Thu 10/225:00 pm -
1 stop25h 17m
Mon 10/266:02 am -
1 stop23h 18m
Deal found 10/6$567

Find flight deals from London to Ontario

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$553
(Trip.com)

One-way from

$460
(Trip.com)

Popular in

June

Cheapest in

March

Average price

$617
Provider with most accurate pricing for London (LON)-Ontario flight deals.
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Provider most trusted by Cheapflights users for London (LON)-Ontario flights.
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From London (LON) to Ontario
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One-way flight from London (LON) to Ontario
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Highest demand for flights based on searches. 12% potential increase in price ($102 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 12/10

2:45 pm-10:59 pm

1 stop16h 14m

Ontario

Wed 12/31

12:00 am-9:00 am

Nonstop0h 00m

$469
Quickest round-trip

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 3/8

2:45 pm-10:39 pm

1 stop15h 54m

Ontario

Wed 12/31

12:00 am-9:00 am

Nonstop0h 00m

$474

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Wed 12/9

7:40 am-6:44 pm

1 stop19h 04m

Ontario

Wed 12/31

12:00 am-9:00 am

Nonstop0h 00m

$548

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Sun 12/6

7:30 am-9:38 pm

2 stops22h 08m

Ontario

Wed 12/31

12:00 am-9:00 am

Nonstop0h 00m

$561

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 1/21

2:45 pm-10:41 pm

1 stop15h 56m

Ontario

Mon 1/25

11:36 am-12:20 pm

1 stop16h 44m

$572

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Fri 10/30

2:45 pm-11:42 pm

1 stop15h 57m

Ontario

Mon 11/2

6:00 am-12:20 pm

1 stop22h 20m

$577

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 11/2

2:45 pm-11:06 pm

1 stop16h 21m

Ontario

Wed 11/11

6:00 am-12:20 pm

1 stop22h 20m

$578

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 10/29

2:45 pm-11:42 pm

1 stop15h 57m

Ontario

Sat 11/14

12:02 pm-12:20 pm

1 stop16h 18m

$578

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 1/11

2:45 pm-10:41 pm

1 stop15h 56m

Ontario

Mon 1/25

11:36 am-12:20 pm

1 stop16h 44m

$581

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Fri 4/2

2:25 pm-11:59 pm

1 stop17h 34m

Ontario

Wed 12/31

12:00 am-9:00 am

Nonstop0h 00m

$628

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/9

Showing 1-10 of 23 resultsSorted by cheapest first
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Compare providers for flights from London to Ontario

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to Ontario in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip price

Cheapflights Insights

Everything you need to know about your flight from London to Ontario

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

Currently, January is the cheapest month in which you can book a flight from London to Ontario (average of $553). Flying from London to Ontario in June is currently the most expensive (average of $882). 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.

How much does it cost to fly round-trip from London to Ontario?

Airfare is typical for this route at the moment.
London to Ontario flights typically cost between $543 and $686 in October.
The cheapest round-trip price found within the last 5 days was $553 on Alaska Airlines (Oct 29-Nov 3).

Related info for your journey

  • What airport do you fly into for flights to Ontario from London?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly into when you book flights from London to Ontario. 0 airlines have flights to Ontario from London on a regular basis. Booking flights from London to Ontario should not be difficult; the airport handles an average of 0 inbound flights from London per day.

  • How long is the flight from London to Ontario?

    Airlines like Alaska Airlines fly from London to Ontario in about 15h 56m. The time it takes to get you to your destination can typically vary by up to . London and Ontario are separated by a distance of 5407 mi.

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

    Most travelers choose London Heathrow - Ontario, London Gatwick - Ontario or London City - Ontario when deciding on the best route 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 vacation 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, January is the cheapest month in which you can book a flight from London to Ontario (average of $553). Flying from London to Ontario in June is currently the most expensive (average of $882). 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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