Which airports can I use when flying from London to Ontario?

Flights from London to Ontario may depart from several airports in London area, including London City (LCY), London Gatwick (LGW), London Heathrow (LHR), London Luton (LTN), London Southend (SEN) and London Stansted (STN). Flights usually arrive at Ontario (ONT).

Which cabin classes can I book on flights from London to Ontario?

Two cabin classes are available on flights from London to Ontario: • Economy class • Premium Economy Class

Which airports do connecting flights from London to Ontario pass through?

One-stop flights from London to Ontario most commonly connect through: • Dallas/Fort Worth (DFW) – 30% of one-stop connections • Seattle/Tacoma Intl (SEA) – 25% of one-stop connections • Denver Intl (DEN) – 14% of one-stop connections • Salt Lake City (SLC) – 14% of one-stop connections

Can I save money by using flexible dates for flights from London to Ontario?

Yes. Flexible dates can save you up to 26% on flights from London to Ontario. Saturday is the cheapest departure day at £499 return on average, while Sunday is the most expensive at £670, a difference of £171. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

What popular places can I visit in Ontario?

Ontario Convention Center is one of the most viewed places in Ontario on KAYAK.

How long is a flight from London to Ontario?

A direct flight from London to Ontario takes 00m, covering 5,416 miles.

Do I need a passport to fly from London to Ontario?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

How are flight prices from London to Ontario looking right now?

One-way fares from London to Ontario are currently lower than usual. Average one-way flight prices are about £461, which is 12% below the typical average for this route.

How much time can I save by choosing a different stopover airport from London to Ontario?

Flying via Denver Intl (DEN) gives the shortest average 1-stop total travel time of 13h 26m, compared to 14h 18m via Phoenix Sky Harbor Intl (PHX) and 15h 13m via San Francisco (SFO).

What is the time difference between London and Ontario?

Ontario is 7 hours behind London (Pacific Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

How much should I expect to pay for a London to Ontario flight?

Return flights from London to Ontario range from £479 to £624, with an average of £532 over the past 12 months. Anything below £479 counts as a good deal.

How much is a return flight from London to Ontario?

Return flights from London to Ontario typically range from £479 to £624. The lowest price found in the past 5 days was £417 on Alaska Airlines.

What is the cheapest London to Ontario flight route?

There's little price difference between London to Ontario routes. They average around £532 return, based on KAYAK data over the past 12 months.

What's the cheapest day of the week to fly from London to Ontario?

Based on deals KAYAK users found in the last 12 months, Saturday is the cheapest day of the week to fly from London to Ontario. It's 7% cheaper than the average day, while Sunday is the most expensive, with prices 26% higher.

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

•January is the cheapest month to fly from London to Ontario at £415 return. •June (£679) and May (£619) are the most expensive months. •The price difference between flying in the cheapest and most expensive months is 63% on average. This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Which airline is the cheapest to fly from London to Ontario?

Alaska Airlines (£417) and Virgin Atlantic (£503) are the cheapest airlines to fly return from London to Ontario according to KAYAK data over the last 5 days.

What is the most popular stopover airport when flying from London to Ontario?

Dallas/Fort Worth (DFW) is the most popular stopover for the London to Ontario route. 30% of KAYAK users who booked 1-stop return journeys over the past 3 months connected via DFW.

What is the cheapest stopover airport when flying from London to Ontario?

Flights via Seattle/Tacoma Intl (SEA) offer the most affordable fares, with an average return price of £517. Based on KAYAK data over the past 3 months.

When flying from London to Ontario, which airport offers the shortest stopover?

Denver Intl (DEN) had the shortest average connection time for London to Ontario stopovers at 7h 23m over the past 3 months.

£290 CHEAP FLIGHTS from London to Ontario (LON - ONT)

Save 34% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheapest return flight

£417

Typical prices: £479-£624

Alaska Airlines

Mon 12/11Mon 26/11

LHR - ONT • 1 stop

Cheapest one-way flight

£290

Typical prices: £445-£657

Multiple Airlines

Sun 18/11

LGW - ONT • 2 stops

Direct flights

Not available

There are currently no direct flights between London and Ontario. You'll need to take a connecting flight to reach the destination.

Insights

When to travel

January

Cheapest • 22% price drop

May

Most popular

Good to know

Top stopover airports

Seattle/Tacoma Intl (SEA)

Cheapest • Avg £517 (return)

Denver Intl (DEN)

Shortest trip • 13h 26m (one-way)

Insights

Start a new search

KAYAK searches hundreds of sites at once to find you the best travel deals.

We hope you enjoy your trip to Ontario!

Flight Deals

Cheap Flights from London to Ontario (LON-ONT)

Discover the best prices for you by selecting your travel dates on KAYAK.

Return

One-way

Last minute

Recent return flight deals from London to Ontario

Thu, 12 Nov - Thu, 26 Nov

14:45 - 18:17LHR London Heathrow-ONT Ontario

35h 32m1 stop Seattle/Tacoma Intl

06:00 - 12:20ONT Ontario-LHR London Heathrow

22h 20m1 stop Seattle/Tacoma Intl

£417Alaska Airlines

Thu, 26 Nov - Wed, 9 Dec

14:45 - 11:11LHR London Heathrow-ONT Ontario

28h 26m1 stop Seattle/Tacoma Intl

11:57 - 12:20ONT Ontario-LHR London Heathrow

16h 23m1 stop Seattle/Tacoma Intl

£423Alaska Airlines

Mon, 1 Mar - Sun, 7 Mar

20:25 - 22:43LHR London Heathrow-ONT Ontario

34h 18m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

07:00 - 10:40ONT Ontario-LHR London Heathrow

19h 40m1 stop Seattle/Tacoma Intl

£503Virgin Atlantic

Thu, 4 Mar - Sat, 13 Mar

06:30 - 22:43LHR London Heathrow-ONT Ontario

24h 13m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

13:00 - 10:00ONT Ontario-LHR London Heathrow

13h 00m1 stop Salt Lake City

£504Virgin Atlantic

Thu, 1 Apr - Fri, 30 Apr

15:15 - 11:27LHR London Heathrow-ONT Ontario

28h 12m1 stop Atlanta Hartsfield-Jackson

22:59 - 11:20ONT Ontario-LHR London Heathrow

28h 21m1 stop Atlanta Hartsfield-Jackson

£512Delta

Mon, 15 Feb - Sat, 20 Feb

20:25 - 22:14LHR London Heathrow-ONT Ontario

33h 49m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

06:00 - 10:00ONT Ontario-LHR London Heathrow

20h 00m1 stop Salt Lake City

£525KLM

Sat, 21 Nov - Sat, 28 Nov

09:00 - 20:15LHR London Heathrow-ONT Ontario

19h 15m2 stops Zurich San Francisco

13:29 - 09:40ONT Ontario-LHR London Heathrow

12h 11m1 stop Denver Intl

£601United Airlines

Tue, 8 Dec - Tue, 15 Dec

09:00 - 09:38LHR London Heathrow-ONT Ontario

32h 38m2 stops Zurich San Francisco

05:00 - 07:55ONT Ontario-LHR London Heathrow

18h 55m2 stops Denver Intl Chicago O'Hare Intl

£601United Airlines

Thu, 19 Nov - Sat, 28 Nov

14:10 - 23:20LHR London Heathrow-ONT Ontario

17h 10m1 stop Charlotte Douglas

06:00 - 06:50ONT Ontario-LHR London Heathrow

16h 50m1 stop Dallas/Fort Worth

£614British Airways

Fri, 20 Nov - Sat, 28 Nov

08:20 - 18:52LHR London Heathrow-ONT Ontario

18h 32m1 stop Dallas/Fort Worth

07:00 - 06:50ONT Ontario-LHR London Heathrow

15h 50m1 stop Dallas/Fort Worth

£614British Airways

Recent last minute flight deals from London to Ontario

Tue, 3 Nov - Tue, 10 Nov

14:45 - 11:18LHR London Heathrow-ONT Ontario

28h 33m1 stop Seattle/Tacoma Intl

06:00 - 12:20ONT Ontario-LHR London Heathrow

22h 20m1 stop Seattle/Tacoma Intl

£425Alaska Airlines

Sun, 1 Nov - Fri, 4 Dec

14:45 - 23:06LHR London Heathrow-ONT Ontario

16h 21m1 stop Seattle/Tacoma Intl

06:00 - 12:20ONT Ontario-LHR London Heathrow

22h 20m1 stop Seattle/Tacoma Intl

£426Alaska Airlines

Mon, 2 Nov - Mon, 9 Nov

06:40 - 19:30LHR London Heathrow-ONT Ontario

20h 50m2 stops Kastrup Copenhagen San Francisco

12:01 - 16:00ONT Ontario-LHR London Heathrow

19h 59m2 stops San Francisco Kastrup Copenhagen

£724Multiple Airlines

Mon, 2 Nov - Fri, 6 Nov

06:40 - 19:30LHR London Heathrow-ONT Ontario

20h 50m2 stops Kastrup Copenhagen San Francisco

20:35 - 16:00ONT Ontario-LHR London Heathrow

35h 25m3 stops Las Vegas Harry Reid Intl San Francisco Kastrup Copenhagen

£739Multiple Airlines

Mon, 2 Nov - Tue, 17 Nov

06:30 - 22:43LHR London Heathrow-ONT Ontario

24h 13m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

11:57 - 10:40ONT Ontario-LHR London Heathrow

14h 43m1 stop Seattle/Tacoma Intl

£741Virgin Atlantic

Sun, 1 Nov - Sun, 8 Nov

17:05 - 22:43LHR London Heathrow-ONT Ontario

37h 38m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

07:07 - 09:00ONT Ontario-LHR London Heathrow

17h 53m1 stop Atlanta Hartsfield-Jackson

£755Virgin Atlantic

Sat, 31 Oct - Sat, 7 Nov

10:05 - 18:44LHR London Heathrow-ONT Ontario

15h 39m1 stop Dallas/Fort Worth

12:42 - 10:00ONT Ontario-LHR London Heathrow

13h 18m1 stop Dallas/Fort Worth

£770British Airways

Mon, 2 Nov - Wed, 6 Jan

11:35 - 20:15LHR London Heathrow-ONT Ontario

16h 40m2 stops Denver Intl San Francisco

14:00 - 11:15ONT Ontario-LHR London Heathrow

13h 15m1 stop San Francisco

£785United Airlines

Tue, 3 Nov - Fri, 6 Nov

09:30 - 20:15LHR London Heathrow-ONT Ontario

18h 45m2 stops Frankfurt am Main San Francisco

13:32 - 09:40ONT Ontario-LHR London Heathrow

12h 08m1 stop Denver Intl

£892United Airlines

Sun, 1 Nov - Mon, 9 Nov

14:35 - 21:53LHR London Heathrow-ONT Ontario

15h 18m1 stop Phoenix Sky Harbor Intl

16:51 - 13:35ONT Ontario-LHR London Heathrow

12h 44m1 stop Phoenix Sky Harbor Intl

£1,940British Airways

Booking Insights

Price, demand, and travel trends for London to Ontario flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

Prices

Airlines

Stopovers

How much is a return flight from London to Ontario? This analysis is based on the cheapest return price found on KAYAK in the last 12 months by searching for a flight from London to Ontario departing in November.
What is the cheapest London to Ontario flight route? KAYAK tracks online flight deals over the last 12 months and analyses pricing trends to identify the best available fares.: There's little price difference between London to Ontario routes. They average around £532 return, based on KAYAK data over the past 12 months.
What's the cheapest day of the week to fly from London to Ontario?: Based on deals KAYAK users found in the last 12 months, Saturday is the cheapest day of the week to fly from London to Ontario. It's 7% cheaper than the average day, while Sunday is the most expensive, with prices 26% higher.
What is the cheapest month to fly from London to Ontario? KAYAK internal proprietary data takes all prices for each month over the last 12 months for return flights from London to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.: •January is the cheapest month to fly from London to Ontario at £415 return.
•June (£679) and May (£619) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 63% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Find deals

Low season	February
High season	May
Cheapest flight	£290

Beat the crowds with an average 47% drop in traveller numbers.

The most popular month to fly with an average 59% increase in traveller numbers.

One-way flight from London Gatwick Airport to Ontario

When to book flights from London to Ontario

Are your dates flexible? Find out the best times to travel from London to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated return price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Which cabin classes can I book on flights from London to Ontario?
Two cabin classes are available on flights from London to Ontario:

• Economy class
• Premium Economy Class
How long is a flight from London to Ontario?
A direct flight from London to Ontario takes 00m, covering 5,416 miles.
Do I need a passport to fly from London to Ontario?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
How much should I expect to pay for a London to Ontario flight?
Return flights from London to Ontario range from £479 to £624, with an average of £532 over the past 12 months. Anything below £479 counts as a good deal.
How are flight prices from London to Ontario looking right now?
One-way fares from London to Ontario are currently lower than usual. Average one-way flight prices are about £461, which is 12% below the typical average for this route.
Which airports can I use when flying from London to Ontario?
Flights from London to Ontario may depart from several airports in London area, including London City (LCY), London Gatwick (LGW), London Heathrow (LHR), London Luton (LTN), London Southend (SEN) and London Stansted (STN). Flights usually arrive at Ontario (ONT).
Which airports do connecting flights from London to Ontario pass through?
One-stop flights from London to Ontario most commonly connect through:

• Dallas/Fort Worth (DFW) – 30% of one-stop connections
• Seattle/Tacoma Intl (SEA) – 25% of one-stop connections
• Denver Intl (DEN) – 14% of one-stop connections
• Salt Lake City (SLC) – 14% of one-stop connections
Can I save money by using flexible dates for flights from London to Ontario?
Yes. Flexible dates can save you up to 26% on flights from London to Ontario. Saturday is the cheapest departure day at £499 return on average, while Sunday is the most expensive at £670, a difference of £171.

Cheaper weekend fares like these are typical of routes dominated by weekday business travel.
How much time can I save by choosing a different stopover airport from London to Ontario?
Flying via Denver Intl (DEN) gives the shortest average 1-stop total travel time of 13h 26m, compared to 14h 18m via Phoenix Sky Harbor Intl (PHX) and 15h 13m via San Francisco (SFO).
What is the time difference between London and Ontario?
Ontario is 7 hours behind London (Pacific Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.
What popular places can I visit in Ontario?
Ontario Convention Center is one of the most viewed places in Ontario on KAYAK.

If your dates are flexible, aim for a Saturday departure and avoid flying on Sunday. On this route, Saturday flights average £499, about £171 less than Sunday fares (26% savings) based on the last 12 months.
If you can choose when to travel, plan your London to Ontario trip for January. Fares historically average £415 return in that month – typically £264 less than the most expensive month, which is June (based on the last 12 months).
If you're arriving late at night and need somewhere to stay, check out these hotels close to Ontario Airport.

• Ontario Airport Inn
• Holiday Inn Ontario Airport By IHG
• Azure Hotel & Suites, Trademark Collection by Wyndham

More options for your flight from London to Ontario

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Airports

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Return flight

Complete your trip to Ontario with a hotel stay or car hire

Car hire in Ontario

Hotels in Ontario

Holidays in Ontario

LON - ONT

£290 Find Cheap Flights from London to Ontario – Compare and Save

Everything you should know

Cheap Flights from London to Ontario (LON-ONT)

Recent return flight deals from London to Ontario

Recent one-way flight deals from London to Ontario

Recent last minute flight deals from London to Ontario

Price, demand, and travel trends for London to Ontario flights

How much is a return flight from London to Ontario?

What is the cheapest London to Ontario flight route?

What's the cheapest day of the week to fly from London to Ontario?

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

Which airline is the cheapest to fly from London to Ontario?

What is the most popular stopover airport when flying from London to Ontario?

What is the cheapest stopover airport when flying from London to Ontario?

When flying from London to Ontario, which airport offers the shortest stopover?

Key details for London to Ontario flights

Low season

High season

Cheapest flight

When to book flights from London to Ontario

Your London to Ontario flight questions, answered

Your guide to booking London to Ontario flights

More options for your flight from London to Ontario

Complete your trip to Ontario with a hotel stay or car hire

Information on your arrival and departure airports

Cabin class types available on flights from London to Ontario

Find direct flights to and from London and Ontario

Flights from domestic origins to Ontario

Flights to other popular destinations

Find deals for your return flight