LHR - ONT

$450 Find Cheap Flights from London to Ontario - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$511
Typical prices: $642-$833
United Airlines
Tue 10/16Wed 10/31
LHR - ONT • 2 stops
Cheapest one-way
$450
Typical prices: $607-$875
Alaska Airlines
Fri 11/2
LHR - ONT • 1 stop
Nonstop flights
Not available
There are currently no direct flights between London Heathrow Airport and Ontario. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
January
Cheapest • 22% price drop
May
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Atlanta Hartsfield-Jackson (ATL)
Cheapest • Avg $633 (round-trip)
Denver Intl (DEN)
Shortest trip • 14h 02m (one-way)
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Insights
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We hope you love your trip to Ontario!
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Flight Deals

Cheap Flights from London to Ontario (LHR-ONT)

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

Recent round-trip flight deals from London to Ontario

Fri, Oct 16 - Sat, Oct 31
United Airlines Logo
8:40 am - 10:51 pmLHR  London Heathrow-ONT Ontario
22h 11m2 stops Zurich San Francisco
United Airlines Logo
5:00 am - 9:40 amONT  Ontario-LHR London Heathrow
21h 40m1 stop Denver Intl
$511United Airlines
Sat, Nov 7 - Mon, Nov 30
United Airlines Logo
9:00 am - 8:15 pmLHR  London Heathrow-ONT Ontario
19h 15m2 stops Zurich San Francisco
United Airlines Logo
6:00 am - 7:25 amONT  Ontario-LHR London Heathrow
17h 25m1 stop San Francisco
$511United Airlines
Tue, Dec 1 - Sun, Dec 6
United Airlines Logo
9:00 am - 8:29 pmLHR  London Heathrow-ONT Ontario
19h 29m2 stops Zurich San Francisco
United Airlines Logo
11:26 am - 11:15 amONT  Ontario-LHR London Heathrow
15h 49m1 stop San Francisco
$512United Airlines
Wed, Nov 4 - Fri, Dec 4
United Airlines Logo
9:00 am - 8:15 pmLHR  London Heathrow-ONT Ontario
19h 15m2 stops Zurich San Francisco
United Airlines Logo
6:40 pm - 8:35 pmONT  Ontario-LHR London Heathrow
17h 55m2 stops San Francisco Newark
$512United Airlines
Tue, Dec 1 - Sun, Dec 6
United Airlines Logo
9:00 am - 8:29 pmLHR  London Heathrow-ONT Ontario
19h 29m2 stops Zurich San Francisco
United Airlines Logo
11:26 am - 9:40 amONT  Ontario-LHR London Heathrow
38h 14m2 stops San Francisco Denver Intl
$512United Airlines
Wed, Nov 4 - Fri, Dec 4
United Airlines Logo
9:00 am - 8:15 pmLHR  London Heathrow-ONT Ontario
19h 15m2 stops Zurich San Francisco
United Airlines Logo
7:00 am - 5:55 amONT  Ontario-LHR London Heathrow
14h 55m1 stop Chicago O'Hare Intl
$512United Airlines
Tue, Sep 15 - Mon, Nov 30
United Airlines Logo
8:45 am - 8:01 pmLHR  London Heathrow-ONT Ontario
19h 16m2 stops Zurich San Francisco
United Airlines Logo
5:00 am - 9:40 amONT  Ontario-LHR London Heathrow
20h 40m1 stop Denver Intl
$513United Airlines
Fri, Nov 20 - Sun, Nov 29
United Airlines Logo
7:30 am - 8:15 pmLHR  London Heathrow-ONT Ontario
20h 45m2 stops Frankfurt am Main San Francisco
United Airlines Logo
6:00 am - 7:25 amONT  Ontario-LHR London Heathrow
17h 25m1 stop San Francisco
$517United Airlines
Fri, Oct 30 - Mon, Nov 9
British Airways Logo
10:05 am - 6:44 pmLHR  London Heathrow-ONT Ontario
15h 39m1 stop Dallas/Fort Worth
British Airways Logo
12:42 pm - 10:00 amONT  Ontario-LHR London Heathrow
13h 18m1 stop Dallas/Fort Worth
$647British Airways
Sat, Nov 21 - Sat, Dec 5
British Airways Logo
2:45 pm - 10:36 pmLHR  London Heathrow-ONT Ontario
15h 51m1 stop Dallas/Fort Worth
British Airways Logo
12:42 pm - 10:00 amONT  Ontario-LHR London Heathrow
13h 18m1 stop Dallas/Fort Worth
$647British Airways
Booking Insights

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

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

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

Round-trip flights from London Heathrow Airport to Ontario start at $511. Prices are below average for this route right now, with typical round-trip fares ranging from $642 to $833. The lowest price found in the past 5 days was $511 on United Airlines.

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

Saturday is the cheapest day of the week to fly from London Heathrow Airport to Ontario, it is 13% cheaper than the average day. Sunday is the most expensive day with flight prices 25% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • January is the cheapest month to fly from London Heathrow Airport to Ontario at $553 round-trip.
  • June ($905) and May ($888) 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

Key details for London Heathrow Airport to Ontario flights

Low season

October

Cheapest flight

$450
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly with an average 25% increase in price.
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

Your London Heathrow Airport to Ontario flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

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

    Flights from London Heathrow Airport to Ontario usually depart from London Heathrow (LHR) and arrive at Ontario (ONT).

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

    Two cabin classes are available on flights from London Heathrow Airport to Ontario:

    • Economy Class
    • First Class

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

    One-stop flights from London Heathrow Airport to Ontario most commonly connect through:

    • Dallas/Fort Worth (DFW) - 41% of one-stop connections
    • Seattle/Tacoma Intl (SEA) - 19% of one-stop connections
    • Phoenix Sky Harbor Intl (PHX) - 13% of one-stop connections
    • Salt Lake City (SLC) - 9% of one-stop connections

    Dallas/Fort Worth (DFW) handles the largest share of one-stop connections on this route.

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

    On the London Heathrow Airport to Ontario route, being flexible with your departure day can save you up to 31%. Saturday is the cheapest day at $618 round-trip on average, while Sunday is the most expensive at $893: a $275 difference. 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, Ontario Mills and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

  • How long is a flight from London Heathrow Airport to Ontario?

    A nonstop flight from London Heathrow Airport to Ontario takes 0h 00m, covering 5,407 miles.

  • Do I need a passport to fly from London Heathrow Airport 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 Heathrow Airport to Ontario looking right now?

    One-way fares from London Heathrow Airport to Ontario are currently lower than usual. Average one-way flight prices are about $475, which is 32% below the typical average for this route.

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

    Flying via Denver Intl (DEN) gives the shortest average 1-stop total travel time at 14h 02m, compared with 14h 05m via Phoenix Sky Harbor Intl (PHX) and 14h 18m via San Francisco (SFO).

  • What is the time difference between London Heathrow Airport and Ontario?

    Ontario is 8 hours behind London Heathrow Airport (Pacific Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at Ontario Airport (ONT)?

    Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:
    · Fox
    · Thrifty
    · Europcar
    · Dollar
    · Alamo

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

    Round-trip flights from London Heathrow Airport to Ontario range from $642 to $833, with an average of $710 over the past 12 months. Anything below $642 counts as a good deal.

Your guide to booking London Heathrow Airport to Ontario flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Saturday departure instead of Sunday. On this route, Saturday flights average $618 - about $275 less than Sunday (31% savings) based on the last 12 months.
  • If you can choose when to travel, plan your London Heathrow Airport 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.
    - Azure Hotel & Suites, Trademark Collection by Wyndham
    - La Quinta Inn & Suites by Wyndham Ontario Airport
    - Holiday Inn Ontario Airport By IHG

Everything you need to know for your flight from London to Ontario

Information on your arrival and departure airports

London (LHR)
Ontario (ONT)