Menu

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

Know your dates, get live prices in seconds:

From
To
Depart
Return
Any month
Compare vs. Cheapflights |
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime

We work with more than 300 partners to bring you better travel deals

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

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

ONT - LON
Price
$407 - $700
LON
Temperature
48.2 - 73.4 °F
LON
Rainfall
1.4 - 2.8 inches

Popular in

June

High demand for flights, 27% potential price rise

Cheapest in

August

Best time to find cheap flights, 21% potential price drop

Average price

$414

Average for round-trip flights in January 2021

Round-trip from

$407

From Ontario to London

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 round-trip from Ontario to London?

Leaving on a Monday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 30% on the overall cost on flights from Ontario 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 61 days before your planned departure. Booking around this time can save you about 44% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $910 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $1,146.

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

Flights from Ontario to London lean towards being more expensive in July. Prices are generally better when you fly from Ontario to London in October, with the cheapest ticket starting at $445.

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

When flying from Ontario to London, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 16% versus a flight at noon.

Cheap flights from Ontario to London in January, February 2021

The best prices found for ONT to LON flights for January, February
26 Feb - 28 Feb
$769pp
ONT
Ontario
Delta
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Delta
 
1 STOP
ONT
Ontario
26 Feb - 28 Feb
$770pp
ONT
Ontario
Delta
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Delta
 
1 STOP
ONT
Ontario
26 Feb - 28 Feb
$774pp
ONT
Ontario
United Airlines
   
2 STOPS
LHR
London Heathrow
LHR
London Heathrow
United Airlines
   
2 STOPS
ONT
Ontario

Ontario to London 2021 flight deals

Cheap flights to London from Ontario found for this year
8 Mar - 8 Apr
$631pp
ONT
Ontario
Multiple Airlines
   
2 STOPS
LHR
London Heathrow
LHR
London Heathrow
Lufthansa
 
1 STOP
ONT
Ontario
6 Oct - 12 Oct
$667pp
ONT
Ontario
Air Canada
   
2 STOPS
LHR
London Heathrow
LHR
London Heathrow
Air Canada
   
2 STOPS
ONT
Ontario
3 Mar - 24 Aug
$668pp
ONT
Ontario
Air Canada
   
2 STOPS
LHR
London Heathrow
LHR
London Heathrow
Air Canada
   
2 STOPS
ONT
Ontario

Last minute flights from Ontario to London

Late deals on round-trip flights to London from Ontario, departing today and this week
29 Jan - 31 Jan
$952pp
ONT
Ontario
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
   
2 STOPS
ONT
Ontario
29 Jan - 31 Jan
$965pp
ONT
Ontario
Multiple Airlines
   
2 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
   
2 STOPS
ONT
Ontario
30 Jan - 6 Feb
$990pp
ONT
Ontario
Multiple Airlines
     
3 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
     
3 STOPS
ONT
Ontario

One-way flights to London from Ontario

The cheapest one-way flights from Ontario to London
8:49 am - 5:45 pm
Multiple Airlines
3 Stops
48h 56m
ONT - SEN
Multiple Airlines
$525
Kiwi.com
7:53 am - 6:05 am
Delta
1 Stop
14h 12m
ONT - LHR
Delta
$560
Delta
3:30 am - 1:20 am
American Airlines
1 Stop
13h 50m
ONT - LHR
American Airlines

Related info for your journey

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

Flight FAQs

From Ontario to London

Are flight prices decreasing from Ontario to London 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 Ontario and London 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.

What safety measures are being taken by airlines flying from Ontario to London to control the spread of COVID-19?

Delta is one of the many airlines that have implemented additional safety measures to control the spread of COVID-19. Airline carriers are regularly disinfecting and sanitizing their aircraft. Masks are provided and are mandatory while on board. Pre-flight testing for symptoms and antibodies, alongside socially distanced seating (for a limited time) will work towards keeping travelers safer while flying from Ontario to London. Policies will vary by airline.

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 American Airlines, British Airways, and United Airlines flying from Ontario to London have implemented new flexible cancellation policies.

Can I find flights from Ontario to London for under $700 on Cheapflights?

Yes, there are multiple flights from Ontario to London for under $700. The cheapest flight booked recently is on Multiple Airlines for just $631, but on average you can expect to pay $682.

Are there nonstop flights from Ontario to London for under $600 on Cheapflights?

There are no nonstop flights from Ontario to London, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

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

There are currently 14+ open flights from Ontario to London within the next 7 days for less than $1,000.

Is Ontario weather warmer or cooler than London?

Temperatures around the 95 °F's can be experienced in July. The weather in London is colder than in Ontario. Plan for potential changes in flight availability as peak weather approaches in this location.

How long is the flight from Ontario to London?

For as low as $751, American Airlines can have you in London from Ontario in 12h 51m. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

Flying on Air Canada is currently your cheapest option to London, with prices starting at $668. Additional round-trip tickets that might be worth considering are offered by British Airways and United Airlines, with the lowest prices starting at $671 and $676, respectively.

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

One-way options have recently been found by users for as low as $398 on United Airlines. Other airlines that offer cheap prices include British Airways from $412 and Delta from $488 one-way.

Alternative routes for Ontario to London

Destination information for London

Things to know before you go. Useful info for your trip from Ontario to London
Today's exchange rate
$1 = £0.74
Average temperature for January in London
48.2 °F
Avg rainfall for January in London
2.0 ″

Airports servicing Ontario

Airports servicing London

Gatwick (LGW)
City (LCY)
Stansted (STN)
Luton (LTN)
Southend (SEN)

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.

Airline Cheapest Average Flexibility On-time COVID-19 safety
Air France
$453 $614 No cancel fee 77%
Delta
$374 $631 No cancel fee N/A
American Airlines
$366 $645 No cancel fee 71%
United Airlines
$379 $654 No cancel fee 69%
British Airways
$350 $680 No cancel fee 70%
Home Europe United Kingdom England London Cheap flights from Ontario to London