Cheap flights from Ontario (ONT) to London (LON)

ONT — LON
May 30 — Jun 61

The best prices from Ontario to London are usually found in August or January, booked 53 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

How to find the cheapest flight from Ontario to London

All the information you need to plan the best ONT to LON flight in 2022: compare Ontario to London flight prices with the expected peak season, weather and rainfall in London.

ONT - LON

Price

$407 - $700

LON

Temperature

39.2 - 62.6 °F

LON

Rainfall

1.6 - 2.8 inches

Popular inJuneHigh demand for flights, 27% potential price rise
Cheapest inAugustBest time to find cheap flights, 21% potential price drop
Average price$500Average for round-trip flights in May 2022
Round-trip from$407From Ontario to London (LON)

What is the cheapest day to fly round-trip from Ontario to London?

Wednesday flights are found to be more expensive to fly from Ontario to London. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London.

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

To save on the cost of your flight from Ontario to London, book at least 38 days before your planned departure. Booking around this time can save you about 86% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $663 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $920.

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

Our data shows that February tends to be the cheapest month to fly to London from Ontario. Users have commonly found prices around $482 for the month, but tickets can be as low as $345. Due to multiple factors, prepare for potentially higher prices in December.

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

It’s optimal to fly from Ontario to London at noon. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight in the evening.

Cheap flights from Ontario to London in May, June 2022

The best prices found for ONT to LON flights for May, June
May 29 - Jun 21
ONT

Ontario

LHR

London Heathrow

1 stop

15h 10m
LHR

London Heathrow

ONT

Ontario

2 stops

22h 48m
$932

American Airlines

View Deal

Deal found 22/5/22

Jun 22 - Sep 26
ONT

Ontario

LHR

London Heathrow

2 stops

27h 45m
LHR

London Heathrow

ONT

Ontario

1 stop

14h 53m
$961

British Airways

View Deal

Deal found 24/5/22

May 29 - Jun 21
ONT

Ontario

LHR

London Heathrow

1 stop

13h 55m
LHR

London Heathrow

ONT

Ontario

1 stop

14h 27m
$970

British Airways

View Deal

Deal found 22/5/22

Ontario to London 2022 flight deals

Cheap flights to London from Ontario found for this year
Aug 24 - Aug 25
ONT

Ontario

LCY

London City

2 stops

21h 20m
LCY

London City

ONT

Ontario

2 stops

42h 08m
$799

British Airways

View Deal

Deal found 24/5/22

Sep 27 - Oct 4
ONT

Ontario

LHR

London Heathrow

1 stop

12h 40m
LHR

London Heathrow

ONT

Ontario

1 stop

16h 19m
$807

Virgin Atlantic

View Deal

Deal found 24/5/22

Sep 21 - Oct 4
ONT

Ontario

LHR

London Heathrow

1 stop

13h 23m
LHR

London Heathrow

ONT

Ontario

2 stops

19h 57m
$814

British Airways

View Deal

Deal found 22/5/22

Cheap Air Canada flights from Ontario to London

Sep 27 - Oct 11
ONT

Ontario

LHR

London Heathrow

2 stops

21h 05m
LHR

London Heathrow

ONT

Ontario

2 stops

45h 10m
$836

Air Canada

View Deal

Deal found 22/5/22

Sep 19 - Sep 30
ONT

Ontario

LHR

London Heathrow

2 stops

21h 05m
LHR

London Heathrow

ONT

Ontario

2 stops

46h 10m
$886

Air Canada

View Deal

Deal found 22/5/22

Jun 2 - Jun 7
ONT

Ontario

LHR

London Heathrow

2 stops

19h 45m
LHR

London Heathrow

ONT

Ontario

2 stops

38h 24m
$1,045

Air Canada

View Deal

Deal found 24/5/22

Cheap Delta flights from Ontario to London

Oct 18 - Oct 28
ONT

Ontario

LHR

London Heathrow

2 stops

20h 45m
LHR

London Heathrow

ONT

Ontario

2 stops

20h 00m
$841

Delta

View Deal

Deal found 23/5/22

Oct 18 - Oct 28
ONT

Ontario

LHR

London Heathrow

2 stops

17h 05m
LHR

London Heathrow

ONT

Ontario

2 stops

17h 35m
$842

Delta

View Deal

Deal found 24/5/22

Oct 18 - Oct 28
ONT

Ontario

LHR

London Heathrow

2 stops

17h 20m
LHR

London Heathrow

ONT

Ontario

2 stops

25h 14m
$843

Delta

View Deal

Deal found 25/5/22

Last minute flights from Ontario to London

Late deals on return flights to London from Ontario, departing today and this week
May 30 - Jun 10
ONT

Ontario

LHR

London Heathrow

1 stop

14h 18m
LHR

London Heathrow

ONT

Ontario

1 stop

15h 35m
$970

United Airlines

View Deal

Deal found 23/5/22

May 31 - Jun 9
ONT

Ontario

LHR

London Heathrow

1 stop

15h 10m
LHR

London Heathrow

ONT

Ontario

1 stop

16h 53m
$972

American Airlines

View Deal

Deal found 22/5/22

Jun 1 - Jun 7
ONT

Ontario

LHR

London Heathrow

1 stop

12h 31m
LHR

London Heathrow

ONT

Ontario

1 stop

15h 29m
$974

KLM

View Deal

Deal found 22/5/22

One-way flights to London All airports from Ontario

The cheapest one-way flights from Ontario to London
Sep 4
ONT

Ontario

LHR

London Heathrow

3 stops

22h 40m
$530

Multiple Airlines

View Deal

Deal found 23/5/22

Sep 4
ONT

Ontario

LHR

London Heathrow

2 stops

29h 46m
$533

Multiple Airlines

View Deal

Deal found 23/5/22

Jul 6
ONT

Ontario

LGW

London Gatwick

3 stops

40h 50m
$537

Multiple Airlines

View Deal

Deal found 24/5/22

Related info for your journey

Useful info, stats and facts about Ontario to London flights.

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

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

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

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

Can I find flights from Ontario to London for under $800 on Cheapflights?

Yes, there are multiple flights from Ontario to London for under $800. The cheapest flight booked recently is on British Airways for just $799, but on average you can expect to pay $834.

Are there last-minute flights available from Ontario to London for under $1,000?

There are currently 20+ open flights from Ontario to London within the next 7 days for less than $1,000.

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

Flying on British Airways is currently your cheapest option to London, with prices starting at $799. Additional round-trip tickets that might be worth considering are offered by Virgin Atlantic and American Airlines, with the lowest prices starting at $807 and $822, respectively.

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

The cheapest airlines for a one-way flight from Ontario to London are Air Canada ($724), United Airlines ($749), and Avianca ($769).

What are the most popular routes from Ontario to London?

The most popular flight routes from Ontario to London are Ontario - London Heathrow, Ontario - London Gatwick and Ontario - London City.

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

Before booking your flight from Ontario to London check out the most popular airlines for this route: American Airlines, Air France or British Airways.

What are the cheapest flights from Ontario to London?

Looking at all options, your cheapest flight can be booked for $416. While the most popular route (Ontario - London Heathrow) can be booked for $807 on average our data indicates $1,089 when flying from Ontario to London.

Alternative routes for Ontario to London

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

Top 5 airlines flying from Ontario to London

The chart below displays the airlines Cheapflights users traveling from Ontario to London choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
Air FranceCheapest$453Average$614FlexibilityNo cancel feeOn-time77%COVID-19 safety
Search Air France flights
DeltaCheapest$588Average$866FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights
United AirlinesCheapest$598Average$757FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights
American AirlinesCheapest$621Average$900FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights
British AirwaysCheapest$629Average$849FlexibilityNo cancel feeOn-time70%COVID-19 safety
Search British Airways flights