Cheap Flights from London to Ontario from £344

How to find the cheapest flight from
London (LON) to Ontario (ONT)

All the information you need to plan the best LON to ONT flight in 2021: compare London to Ontario flight prices with the expected peak season, weather and rainfall in Ontario.

LON - ONT Price	£364 - £770
ONT Temperature	12 - 26 °C
ONT Precipitation	3 - 86 mm

Popular in July High demand for flights, 35% potential price rise
Cheapest in February Best time to find cheap flights, 27% potential price drop
Average price £398 Average for round-trip flights in september 2021
Round-trip from €364 From London All airports (LON) to Ontario

Popular in

July

High demand for flights, 35% potential price rise

Cheapest in

February

Best time to find cheap flights, 27% potential price drop

Average price

£398

Average for round-trip flights in september 2021

Round-trip from

€364

From London All airports (LON) to Ontario

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.

What is the cheapest day to fly return from London to Ontario?

Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 32% when planning your travel around this day of the week.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 61 days in advance, which can save you up to 40% on flights from London to Ontario compared to booking the week you need them. Waiting 61 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £398. For sooner than that we have options available in the next 3 days from £474.

What is the cheapest month to fly from London to Ontario?

Flights from London to Ontario lean towards being more expensive in July. Prices are generally better when you fly from London to Ontario in November, with the cheapest ticket starting at £262.

When is the cheapest time to fly from London to Ontario (LON - ONT)?

It’s optimal to fly from London to Ontario at midday. By choosing this option you can save up to 58% on the cost of your flight, compared to a flight in the evening.

Cheap flights from London to Ontario in September, October 2021

The best prices found for LON to ONT flights in September, October

31 Oct - 30 Nov

£372pp

LHR

London Heathrow

British Airways

1 STOP

ONT

Ontario

ONT

Ontario

British Airways

1 STOP

LHR

London Heathrow

31 Oct - 30 Nov

£401pp

LHR

London Heathrow

United Airlines

2 STOPS

ONT

Ontario

ONT

Ontario

United Airlines

1 STOP

LHR

London Heathrow

29 Oct - 2 Nov

£412pp

LHR

London Heathrow

British Airways

1 STOP

ONT

Ontario

ONT

Ontario

British Airways

1 STOP

LHR

London Heathrow

London to Ontario 2021 flight deals

Cheap flights to Ontario from London found for this year

9 Nov - 30 Nov

£344pp

LHR

London Heathrow

British Airways

1 STOP

ONT

Ontario

ONT

Ontario

British Airways

1 STOP

LHR

London Heathrow

30 Nov - 14 Dec

£353pp

LHR

London Heathrow

British Airways

1 STOP

ONT

Ontario

ONT

Ontario

British Airways

1 STOP

LHR

London Heathrow

31 Oct - 30 Nov

£372pp

LHR

London Heathrow

British Airways

1 STOP

ONT

Ontario

ONT

Ontario

British Airways

1 STOP

LHR

London Heathrow

Last-minute flights from London to Ontario

Late deals on return flights to Ontario from London, departing today and this week

5 Oct - 4 Nov

£487pp

LHR

London Heathrow

United Airlines

2 STOPS

ONT

Ontario

ONT

Ontario

United Airlines

1 STOP

LHR

London Heathrow

5 Oct - 4 Nov

£504pp

LHR

London Heathrow

Air Canada

2 STOPS

ONT

Ontario

ONT

Ontario

Air Canada

2 STOPS

LHR

London Heathrow

3 Oct - 2 Nov

£517pp

LHR

London Heathrow

United Airlines

1 STOP

ONT

Ontario

ONT

Ontario

United Airlines

1 STOP

LHR

London Heathrow

One-way flights to Ontario from London

The cheapest one-way flights from London to Ontario

06:15 - 14:31

American Airlines

1 stop

16h 16m

LHR - ONT

£346

10:10 - 16:16

United Airlines

1 stop

14h 06m

LHR - ONT

£363

United

06:15 - 19:52

Finnair

1 stop

21h 37m

LHR - ONT

£371

World Air Fares

Related info for your journey

Useful info, stats and facts about <span class="emphasized">London</span> to <span class="emphasized">Ontario</span> flights.

Flight FAQs

From London to Ontario

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 6 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city centre.

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

Due to the rapidly changing circumstances due to COVID-19, airlines like British Airways, United Airlines, and Virgin Atlantic flying from London to Ontario have implemented new flexible cancellation policies.

Are flight prices decreasing from London to Ontario due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both London and Ontario for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Can I find flights from London to Ontario for under £400 on Cheapflights?

Yes, there are multiple flights from London to Ontario for under £400. The cheapest flight booked recently is on British Airways for just £334, but on average you can expect to pay £368.

Are there last-minute flights available from London to Ontario for under £500?

There are currently 20+ open flights from London to Ontario within the next 7 days for less than £500.

What are the cheapest airlines flying from London to Ontario return?

According to our current data, British Airways (£334), KLM (£335), and Virgin Atlantic (£379) offers the cheapest pricing from London to Ontario. You may be able to fly from London to Ontario for 33% 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 £262. Air Canada flights start at £278 while deals on American Airlines start at £289 one-way.

What are the most popular airlines that fly from London to Ontario?

When booking a flight from London to Ontario, you may want to consider flying on American Airlines, Finnair or British Airways as they are the most popular for this route.

What are the most popular routes from London to Ontario?

The most popular route from London to Ontario is London Heathrow - Ontario. You may also consider London City - Ontario or London Gatwick - Ontario.

What are the cheapest flights from London to Ontario?

While on average a flight from London to Ontario is generally £799, our data shows the cheapest flight currently is £314. When looking at the most popular route, (London Heathrow - Ontario), you can expect to pay £344 for that flight.

COVID Restrictions

View COVID Travel Restrictions for Ontario, CA

Do I need a COVID test to fly to Ontario from London?

Information is based on travel restrictions from London to Ontario

Most visitors from London will not be allowed to enter Ontario.

COVID-19 testing requirements
Visitors from London must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Ontario.

Quarantine requirements
Visitors from London are not required to quarantine after entering Ontario.

Do I need a test to fly back to London from Ontario?

Returning to London from Ontario

COVID-19 testing requirements
Visitors from Ontario must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to London.

Quarantine requirements
Visitors from Ontario are not required to quarantine after entering London.

Hide COVID Travel Restrictions for Ontario, CA

Alternative routes for London to Ontario

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

Bristol to Los Angeles from £367 pp

Birmingham to Fresno Airterminal from £525 pp

Nottingham East Midlands to Los Angeles from £652 pp

Destination information for Ontario

Things to know before you go - useful duration and weather info for your trip from London to Ontario.

£1 = $1.37

Airports servicing London

Heathrow (LHR)

Gatwick (LGW)

Stansted (STN)

London City (LCY)

Luton (LTN)

Southend (SEN)

Airports servicing Ontario

Ontario (ONT)

Airline	Cheapest	Average	Flexibility	On-time
Finnair	£265	£411	No cancel fee	76%	Search Finnair flights
United Airlines	£274	£504	No cancel fee	69%	Search United Airlines flights
Virgin Atlantic	£282	£487	No cancel fee	72%	Search Virgin Atlantic flights
British Airways	£315	£450	No cancel fee	70%	Search British Airways flights
American Airlines	£810	£1,632	No cancel fee	71%	Search American Airlines flights

Cheap flights from London to Ontario

The best prices from London to Ontario are usually found in February or November, booked 42 days in advance, depart on a Wednesday or Saturday and return on a Tuesday

How to find the cheapest flight from London (LON) to Ontario (ONT)

All the information you need to plan the best LON to ONT flight in 2021: compare London to Ontario flight prices with the expected peak season, weather and rainfall in Ontario.

What is the cheapest day to fly return from London to Ontario?

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

What is the cheapest month to fly from London to Ontario?

When is the cheapest time to fly from London to Ontario (LON - ONT)?

Cheap flights from London to Ontario in September, October 2021

The best prices found for LON to ONT flights in September, October

London to Ontario 2021 flight deals

Cheap flights to Ontario from London found for this year

Last-minute flights from London to Ontario

Late deals on return flights to Ontario from London, departing today and this week

One-way flights to Ontario from London

The cheapest one-way flights from London to Ontario

Related info for your journey

Useful info, stats and facts about <span class="emphasized">London</span> to <span class="emphasized">Ontario</span> flights.

Flight FAQs

From London to Ontario

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

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

Are flight prices decreasing from London to Ontario due to COVID-19 (coronavirus)?

Can I find flights from London to Ontario for under £400 on Cheapflights?

Are there last-minute flights available from London to Ontario for under £500?

What are the cheapest airlines flying from London to Ontario return?

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

What are the most popular airlines that fly from London to Ontario?

What are the most popular routes from London to Ontario?

What are the cheapest flights from London to Ontario?

Related searches

Flights to Ontario (ONT) from London

Other flights from London

Other flights to Ontario

Hire a Car

COVID Restrictions

Do I need a COVID test to fly to Ontario from London?

Do I need a test to fly back to London from Ontario?

Alternative routes for London to Ontario

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

Destination information for Ontario

Things to know before you go - useful duration and weather info for your trip from London to Ontario.

Airports servicing London

Airports servicing Ontario

Top 5 airlines flying from London to Ontario

The chart below displays the airlines Cheapflights users travelling from London to Ontario choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2021.

How to find the cheapest flight from
London (LON) to Ontario (ONT)