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).

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

Three cabin classes are available on flights from London to Ontario: • Economy Class • Premium Economy Class • Business 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 $665 round-trip on average, while Sunday is the most expensive at $893, a difference of $228. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

What popular places can I visit in Ontario?

Some of the most popular sights in Ontario are Ontario Convention Center and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

How long is a flight from London to Ontario?

A nonstop 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 $472, which is 32% below the typical average for this route.

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

Flying via Denver Intl (DEN) gives the shortest average 1-stop total travel time at 13h 26m, compared with 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?

Round-trip flights from London to Ontario range from $639 to $831, with an average of $708 over the past 12 months. Anything below $639 counts as a good deal.

How much is a round-trip flight from London to Ontario?

Round-trip flights from London to Ontario typically range from $639 to $831. The lowest price found in the past 5 days was $563, 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 $708 round-trip, 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’s the cheapest month to fly from London to Ontario?

•January is the cheapest month to fly from London to Ontario at $553 round-trip. •June ($905) and May ($825) 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 ($563) offered the cheapest round-trip ticket from London to Ontario in the last 5 days.

What’s the most popular layover airport when flying from London to Ontario?

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

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

Flights via Seattle/Tacoma Intl (SEA) offer the most affordable fares, with an average round-trip price of $689. Based on KAYAK data over the past 3 months.

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

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

$446 CHEAP FLIGHTS from London to Ontario (LON - ONT)

Save 25% 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 round-trip

$563

Typical prices: $639-$831

Alaska Airlines

Mon 11/26Sun 12/9

LHR - ONT • 1 stop

Cheapest one-way

$446

Typical prices: $593-$875

Alaska Airlines

Mon 12/24

LHR - ONT • 1 stop

Nonstop 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 layover airports

Seattle/Tacoma Intl (SEA)

Cheapest • Avg $689 (round-trip)

Denver Intl (DEN)

Shortest trip • 13h 26m (one-way)

Insights

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love 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.

Round-trip

One-way

Last minute

Recent round-trip flight deals from London to Ontario

Thu, Nov 26 - Wed, Dec 9

2:45 pm - 11:11 amLHR London Heathrow-ONT Ontario

28h 26m1 stop Seattle/Tacoma Intl

11:57 am - 12:20 pmONT Ontario-LHR London Heathrow

16h 23m1 stop Seattle/Tacoma Intl

$563Alaska Airlines

Fri, Nov 6 - Tue, Nov 10

2:45 pm - 11:06 pmLHR London Heathrow-ONT Ontario

16h 21m1 stop Seattle/Tacoma Intl

12:02 pm - 12:20 pmONT Ontario-LHR London Heathrow

16h 18m1 stop Seattle/Tacoma Intl

$563Alaska Airlines

Thu, Nov 19 - Thu, Dec 3

2:45 pm - 11:06 pmLHR London Heathrow-ONT Ontario

16h 21m1 stop Seattle/Tacoma Intl

11:57 am - 12:20 pmONT Ontario-LHR London Heathrow

16h 23m1 stop Seattle/Tacoma Intl

$564Alaska Airlines

Wed, Dec 2 - Sun, Dec 6

2:45 pm - 11:13 amLHR London Heathrow-ONT Ontario

28h 28m1 stop Seattle/Tacoma Intl

6:00 am - 12:20 pmONT Ontario-LHR London Heathrow

22h 20m1 stop Seattle/Tacoma Intl

$565Alaska Airlines

Thu, Dec 10 - Tue, Jan 12

2:45 pm - 10:59 pmLHR London Heathrow-ONT Ontario

16h 14m1 stop Seattle/Tacoma Intl

11:36 am - 12:20 pmONT Ontario-LHR London Heathrow

16h 44m1 stop Seattle/Tacoma Intl

$565Alaska Airlines

Sun, Nov 22 - Sun, Dec 6

2:45 pm - 11:31 pmLHR London Heathrow-ONT Ontario

16h 46m1 stop Seattle/Tacoma Intl

6:00 am - 12:20 pmONT Ontario-LHR London Heathrow

22h 20m1 stop Seattle/Tacoma Intl

$566Alaska Airlines

Sat, Nov 21 - Sat, Dec 5

2:45 pm - 11:31 pmLHR London Heathrow-ONT Ontario

16h 46m1 stop Seattle/Tacoma Intl

6:00 am - 12:20 pmONT Ontario-LHR London Heathrow

22h 20m1 stop Seattle/Tacoma Intl

$567Alaska Airlines

Tue, Nov 24 - Fri, Dec 4

2:45 pm - 11:31 pmLHR London Heathrow-ONT Ontario

16h 46m1 stop Seattle/Tacoma Intl

6:00 am - 12:20 pmONT Ontario-LHR London Heathrow

22h 20m1 stop Seattle/Tacoma Intl

$567Alaska Airlines

Fri, Nov 6 - Fri, Nov 13

2:45 pm - 11:06 pmLHR London Heathrow-ONT Ontario

16h 21m1 stop Seattle/Tacoma Intl

12:02 pm - 12:20 pmONT Ontario-LHR London Heathrow

16h 18m1 stop Seattle/Tacoma Intl

$567Alaska Airlines

Fri, Nov 6 - Mon, Nov 9

2:45 pm - 3:13 pmLHR London Heathrow-ONT Ontario

32h 28m1 stop Seattle/Tacoma Intl

6:00 am - 12:20 pmONT Ontario-LHR London Heathrow

22h 20m1 stop Seattle/Tacoma Intl

$567Alaska Airlines

Recent last minute flight deals from London to Ontario

Thu, Oct 29 - Wed, Nov 11

2:45 pm - 11:42 pmLHR London Heathrow-ONT Ontario

15h 57m1 stop Seattle/Tacoma Intl

12:02 pm - 12:20 pmONT Ontario-LHR London Heathrow

16h 18m1 stop Seattle/Tacoma Intl

$563Alaska Airlines

Thu, Oct 29 - Wed, Nov 4

2:45 pm - 10:17 amLHR London Heathrow-ONT Ontario

26h 32m1 stop Seattle/Tacoma Intl

12:02 pm - 12:20 pmONT Ontario-LHR London Heathrow

16h 18m1 stop Seattle/Tacoma Intl

$563Alaska Airlines

Sun, Nov 1 - Fri, Dec 4

2:45 pm - 11:06 pmLHR London Heathrow-ONT Ontario

16h 21m1 stop Seattle/Tacoma Intl

6:00 am - 12:20 pmONT Ontario-LHR London Heathrow

22h 20m1 stop Seattle/Tacoma Intl

$567Alaska Airlines

Mon, Nov 2 - Tue, Nov 17

2:45 pm - 3:13 pmLHR London Heathrow-ONT Ontario

32h 28m1 stop Seattle/Tacoma Intl

12:02 pm - 12:20 pmONT Ontario-LHR London Heathrow

16h 18m1 stop Seattle/Tacoma Intl

$567Alaska Airlines

Mon, Nov 2 - Mon, Nov 9

2:45 pm - 11:06 pmLHR London Heathrow-ONT Ontario

16h 21m1 stop Seattle/Tacoma Intl

6:00 am - 12:20 pmONT Ontario-LHR London Heathrow

22h 20m1 stop Seattle/Tacoma Intl

$567Alaska Airlines

Mon, Nov 2 - Tue, Nov 10

2:45 pm - 11:06 pmLHR London Heathrow-ONT Ontario

16h 21m1 stop Seattle/Tacoma Intl

12:02 pm - 12:20 pmONT Ontario-LHR London Heathrow

16h 18m1 stop Seattle/Tacoma Intl

$567Alaska Airlines

Sun, Nov 1 - Thu, Nov 12

2:45 pm - 6:17 pmLHR London Heathrow-ONT Ontario

35h 32m1 stop Seattle/Tacoma Intl

7:13 pm - 12:20 pmONT Ontario-LHR London Heathrow

33h 07m1 stop Seattle/Tacoma Intl

$571Alaska Airlines

Sun, Nov 1 - Sat, Nov 14

2:45 pm - 11:06 pmLHR London Heathrow-ONT Ontario

16h 21m1 stop Seattle/Tacoma Intl

12:02 pm - 12:20 pmONT Ontario-LHR London Heathrow

16h 18m1 stop Seattle/Tacoma Intl

$573Alaska Airlines

Thu, Oct 29 - Thu, Nov 5

2:45 pm - 11:42 pmLHR London Heathrow-ONT Ontario

15h 57m1 stop Seattle/Tacoma Intl

6:00 am - 12:20 pmONT Ontario-LHR London Heathrow

22h 20m1 stop Seattle/Tacoma Intl

$581Alaska Airlines

Fri, Oct 30 - Wed, Nov 4

2:45 pm - 11:42 pmLHR London Heathrow-ONT Ontario

15h 57m1 stop Seattle/Tacoma Intl

12:02 pm - 12:20 pmONT Ontario-LHR London Heathrow

16h 18m1 stop Seattle/Tacoma Intl

$582Alaska Airlines

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

Layovers

How much is a round-trip flight from London to Ontario? This analysis is based on the cheapest round-trip 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 analyzes pricing trends to identify the best available fares.: There's little price difference between London to Ontario routes. They average around $708 round-trip, 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’s 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 round-trip 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 $553 round-trip.
•June ($905) and May ($825) 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	$446

Beat the crowds with an average 47% drop in travelers.

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

One-way flight from London Heathrow 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 round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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.

What cabin classes can I book on flights from London to Ontario?
Three cabin classes are available on flights from London to Ontario:

• Economy Class
• Premium Economy Class
• Business Class
How long is a flight from London to Ontario?
A nonstop 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?
Round-trip flights from London to Ontario range from $639 to $831, with an average of $708 over the past 12 months. Anything below $639 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 $472, which is 32% 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 $665 round-trip on average, while Sunday is the most expensive at $893, a difference of $228.

Cheaper weekend fares like these are typical of routes dominated by weekday business travel.
How much time can I save by choosing a different layover airport from London to Ontario?
Flying via Denver Intl (DEN) gives the shortest average 1-stop total travel time at 13h 26m, compared with 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?
Some of the most popular sights in Ontario are Ontario Convention Center and Cucamonga-Guasti Regional Park. These are among 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 $665, about $228 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 $553 round-trip in that month - typically $352 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

Add a hotel or car rental

Airports

Cabin class

Direct Flights

Origins

Other destinations

Return flight

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

Car rentals in Ontario

Hotels in Ontario

Vacations in Ontario

LON - ONT

$446 Find Cheap Flights from London to Ontario - Compare and Save

Everything you should know

Cheap Flights from London to Ontario (LON-ONT)

Recent round-trip 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 round-trip 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’s the cheapest month to fly from London to Ontario?

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

What’s the most popular layover airport when flying from London to Ontario?

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

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

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 rental

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