Cheap flights from the United Kingdom to Ontario

LHR — ONT
28 May — 4 Jun1
Return
1 adult
Economy
From?
To?
Sat 28/5
Sat 4/6

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

Travelers have found it’s best to book a flight 61 days in advance to save up to 40% 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 61 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 £435, or £519 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 July. Prices are generally better when you fly from United Kingdom to Ontario in November, with the cheapest ticket starting at £287.

When is the cheapest time to fly from United Kingdom to Ontario (GB - 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.

Cheap flights from United Kingdom to Ontario in May, June 2022

The best prices found for United Kingdom to ONT flights in May, June
27 Jun - 13 Jul
LHR

London Heathrow

ONT

Ontario

1 stop

15h 29m
ONT

Ontario

LHR

London Heathrow

1 stop

12h 45m
£534

KLM

View Deal

Deal found 21.05.22

20 Jun - 20 Jul
LHR

London Heathrow

ONT

Ontario

1 stop

14h 27m
ONT

Ontario

LHR

London Heathrow

1 stop

15h 54m
£541

British Airways

View Deal

Deal found 20.05.22

16 Jun - 8 Dec
LHR

London Heathrow

ONT

Ontario

1 stop

15h 29m
ONT

Ontario

LHR

London Heathrow

1 stop

14h 17m
£543

KLM

View Deal

Deal found 23.05.22

United Kingdom to Ontario 2022 flight deals

Cheap flights to Ontario from United Kingdom found for this year
1 Nov - 30 Nov
LHR

London Heathrow

ONT

Ontario

1 stop

15h 17m
ONT

Ontario

LHR

London Heathrow

1 stop

12h 40m
£443

United Airlines

View Deal

Deal found 22.05.22

9 Nov - 16 Nov
LHR

London Heathrow

ONT

Ontario

1 stop

15h 25m
ONT

Ontario

LHR

London Heathrow

1 stop

12h 40m
£447

United Airlines

View Deal

Deal found 22.05.22

31 Oct - 6 Nov
LHR

London Heathrow

ONT

Ontario

1 stop

14h 25m
ONT

Ontario

LHR

London Heathrow

1 stop

27h 10m
£451

United Airlines

View Deal

Deal found 23.05.22

Cheap KLM flights from United Kingdom to Ontario

17 Oct - 9 Nov
LHR

London Heathrow

ONT

Ontario

1 stop

15h 29m
ONT

Ontario

LHR

London Heathrow

1 stop

14h 17m
£515

KLM

View Deal

Deal found 22.05.22

20 Sep - 11 Oct
LHR

London Heathrow

ONT

Ontario

1 stop

17h 00m
ONT

Ontario

LHR

London Heathrow

1 stop

14h 22m
£531

KLM

View Deal

Deal found 20.05.22

7 Sep - 21 Sep
LHR

London Heathrow

ONT

Ontario

1 stop

16h 19m
ONT

Ontario

LHR

London Heathrow

1 stop

14h 22m
£534

KLM

View Deal

Deal found 23.05.22

Cheap British Airways flights from United Kingdom to Ontario

2 Nov - 17 Nov
LHR

London Heathrow

ONT

Ontario

1 stop

14h 14m
ONT

Ontario

LHR

London Heathrow

1 stop

12h 20m
£511

British Airways

View Deal

Deal found 21.05.22

18 Oct - 8 Nov
LHR

London Heathrow

ONT

Ontario

1 stop

16h 02m
ONT

Ontario

LHR

London Heathrow

1 stop

14h 01m
£514

British Airways

View Deal

Deal found 22.05.22

1 Sep - 22 Sep
GLA

Glasgow Intl

ONT

Ontario

2 stops

17h 07m
ONT

Ontario

GLA

Glasgow Intl

2 stops

16h 37m
£660

British Airways

View Deal

Deal found 23.05.22

Last-minute flights from United Kingdom to Ontario

Late deals on return flights to Ontario from United Kingdom, departing today and this week
31 May - 6 Jul
LHR

London Heathrow

ONT

Ontario

1 stop

13h 42m
ONT

Ontario

LHR

London Heathrow

1 stop

16h 55m
£586

United Airlines

View Deal

Deal found 22.05.22

28 May - 2 Jun
LHR

London Heathrow

ONT

Ontario

1 stop

13h 42m
ONT

Ontario

LHR

London Heathrow

1 stop

16h 40m
£675

United Airlines

View Deal

Deal found 21.05.22

30 May - 6 Jun
LHR

London Heathrow

ONT

Ontario

1 stop

22h 10m
ONT

Ontario

LHR

London Heathrow

1 stop

16h 55m
£705

United Airlines

View Deal

Deal found 23.05.22

One-way flights to Ontario from United Kingdom

The cheapest one-way flights from United Kingdom to Ontario
31 Oct
EDI

Edinburgh Turnhouse

ONT

Ontario

2 stops

18h 21m
£460

KLM

View Deal

Deal found 22.05.22

31 May
LHR

London Heathrow

ONT

Ontario

3 stops

43h 53m
£463

Multiple Airlines

View Deal

Deal found 21.05.22

25 Oct
EDI

Edinburgh Turnhouse

ONT

Ontario

2 stops

18h 05m
£530

KLM

View Deal

Deal found 21.05.22

Related info for your journey

Useful info, stats and facts about United Kingdom to Ontario flights.

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.

Which airlines flying from United Kingdom to Ontario have flexible cancellations due to COVID-19?

British Airways, KLM, and American Airlines are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Can I find flights from United Kingdom to Ontario for under £500 on Cheapflights?

Yes, there are multiple flights from United Kingdom to Ontario for under £500. The cheapest flight booked recently is on United Airlines for just £443, but on average you can expect to pay £489.

Are there last-minute flights available from United Kingdom to Ontario for under £600?

There are currently 20+ open flights from United Kingdom to Ontario within the next 7 days for less than £600.

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

The cheapest airlines for a one-way flight from United Kingdom to Ontario are KLM (£460), Delta (£575), and Avianca (£623).

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: American Airlines, Finnair or British Airways.

What are the cheapest flights from United Kingdom to Ontario?

On average you can expect to pay £628 for a flight from United Kingdom to Ontario. The cheapest flight overall is £584 while the most popular route, (London Heathrow - Ontario) is currently priced at £489.

Departure points for flights from United Kingdom to Ontario

Select to see more specific information for flights to Ontario from all departure points in United Kingdom

Top 5 airlines flying from United Kingdom to Ontario

The chart below displays the airlines Cheapflights users travelling from United Kingdom to Ontario choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
American AirlinesCheapest£415Average£1,339FlexibilityNo cancel feeOn-time71%COVID-19 safety
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KLMCheapest£442Average£590FlexibilityNo cancel feeOn-time75%COVID-19 safety
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British AirwaysCheapest£459Average£648FlexibilityNo cancel feeOn-time70%COVID-19 safety
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Virgin AtlanticCheapest£496Average£628FlexibilityNo cancel feeOn-time72%COVID-19 safety
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United AirlinesCheapest£526Average£633FlexibilityNo cancel feeOn-time69%COVID-19 safety
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