ONT - LON

$301 Find Cheap Flights from Ontario to London - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$800
Typical prices: $648-$1,054
Alaska Airlines
Sat 1/20Thu 1/25
ONT - LHR • 1 stop
Cheapest one-way
$301
Typical prices: $513-$688
Multiple Airlines
Wed 10/10
ONT - LGW • 2 stops
Nonstop flights
Not available
There are currently no direct flights between Ontario and London. You'll need to take a connecting flight to reach the destination.
Insights
Insights
Top routes
ONT - LHR
Cheapest • 15% average savings
ONT - LGW
Most popular
Insights
Insights
When to travel
June
Cheapest • 33% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Atlanta Hartsfield-Jackson (ATL)
Cheapest • Avg $580 (round-trip)
Salt Lake City (SLC)
Shortest trip • 13h 06m (one-way)
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Insights
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Flight Deals

Cheap Flights from Ontario to London (ONT-LON)

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

Recent round-trip flight deals from Ontario to London

Wed, Jan 20 - Mon, Jan 25
Alaska Airlines Logo
11:36 am - 12:20 pmONT  Ontario-LHR London Heathrow
16h 44m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
2:45 pm - 10:38 amLHR  London Heathrow-ONT Ontario
27h 53m1 stop Seattle/Tacoma Intl
$800Alaska Airlines
Wed, Jan 13 - Sun, Jan 17
Alaska Airlines Logo
11:36 am - 12:20 pmONT  Ontario-LHR London Heathrow
16h 44m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
2:45 pm - 10:41 pmLHR  London Heathrow-ONT Ontario
15h 56m1 stop Seattle/Tacoma Intl
$803Alaska Airlines
Sun, Jan 10 - Wed, Jan 20
Multiple Airlines Logo
2:22 pm - 12:15 pmONT  Ontario-LHR London Heathrow
13h 53m1 stop Dallas/Fort Worth
Multiple Airlines Logo
2:45 pm - 10:41 pmLHR  London Heathrow-ONT Ontario
15h 56m1 stop Seattle/Tacoma Intl
$809Multiple Airlines
Wed, Feb 17 - Thu, Mar 11
Multiple Airlines Logo
2:22 pm - 12:00 pmONT  Ontario-LHR London Heathrow
13h 38m1 stop Dallas/Fort Worth
Multiple Airlines Logo
2:45 pm - 10:39 pmLHR  London Heathrow-ONT Ontario
15h 54m1 stop Seattle/Tacoma Intl
$809Multiple Airlines
Wed, Dec 2 - Sun, Dec 6
British Airways Logo
12:42 pm - 10:00 amONT  Ontario-LHR London Heathrow
13h 18m1 stop Dallas/Fort Worth
British Airways Logo
1:50 pm - 9:32 pmLHR  London Heathrow-ONT Ontario
15h 42m1 stop Dallas/Fort Worth
$837British Airways
Tue, Dec 1 - Tue, Dec 15
British Airways Logo
12:45 pm - 10:25 amONT  Ontario-LHR London Heathrow
13h 40m1 stop Dallas/Fort Worth
British Airways Logo
2:10 pm - 10:12 pmLHR  London Heathrow-ONT Ontario
16h 02m1 stop Charlotte Douglas
$841British Airways
Tue, Dec 1 - Wed, Dec 16
Delta Logo
6:00 am - 7:05 amONT  Ontario-LHR London Heathrow
17h 05m2 stops Salt Lake City Minneapolis St Paul
Delta Logo
8:55 am - 10:59 pmLHR  London Heathrow-ONT Ontario
22h 04m2 stops Paris Charles de Gaulle Seattle/Tacoma Intl
$881Delta
Mon, Nov 30 - Fri, Dec 11
United Airlines Logo
1:35 pm - 11:15 amONT  Ontario-LHR London Heathrow
13h 40m1 stop San Francisco
United Airlines Logo
10:05 am - 5:36 pmLHR  London Heathrow-ONT Ontario
15h 31m1 stop San Francisco
$898United Airlines
Sun, Nov 29 - Fri, Dec 4
United Airlines Logo
1:35 pm - 11:15 amONT  Ontario-LHR London Heathrow
13h 40m1 stop San Francisco
United Airlines Logo
10:05 am - 5:36 pmLHR  London Heathrow-ONT Ontario
15h 31m1 stop San Francisco
$898United Airlines
Tue, Oct 6 - Tue, Oct 13
Delta Logo
7:07 am - 7:15 amONT  Ontario-LHR London Heathrow
16h 08m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:30 am - 5:12 pmLHR  London Heathrow-ONT Ontario
18h 42m2 stops Amsterdam Schiphol Seattle/Tacoma Intl
$907Delta
Booking Insights

Price, demand and travel trends for Ontario to London flights

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

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

Round-trip flights from Ontario to London start at $800. Prices are typical for this route right now, with typical round-trip fares ranging from $648 to $1,054. The lowest price found in the past 5 days was $800 on Alaska Airlines.

What is the cheapest Ontario to London flight route?

Ontario (ONT) to London Heathrow Airport (LHR) is the cheapest Ontario to London route, averaging $786 round-trip. Other Ontario to London routes average $1,054, based on KAYAK data over the past 12 months.

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

Friday is the cheapest day of the week to fly from Ontario to London, it is 17% cheaper than the average day. Sunday is the most expensive day with flight prices 16% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • June is the cheapest month to fly from Ontario to London at $530 round-trip.
  • July ($1,327) and January ($1,267) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 150% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Find deals

Key details for Ontario to London flights

Low season

February

Cheapest flight

$301
Best time to beat the crowds but there is an average 13% increase in price.
Most popular time to fly with an average 67% increase in price.
Flight from Ontario to London Gatwick Airport

When to book flights from Ontario to London

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

Your Ontario to London flight questions, answered

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

  • How can I get to the city center by public transport after my flight from Ontario to London?

    Upon arrival at London Heathrow Airport from Ontario, you can easily reach the city center using public transportation. Take the Heathrow Express train to Paddington Station, which operates every 15 minutes. From Paddington, you can transfer to the London Underground and take the Bakerloo Line or Circle Line to reach the city center.

  • Can I pre-book my seat on WestJet flights from Ontario to London?

    Yes, you can pre-book your seat on WestJet flights from Ontario to London. WestJet offers the option to select your preferred seat in advance, allowing you to secure your desired seating arrangement for a more comfortable journey. By accessing their online booking portal or contacting their customer service, you can make seat reservations according to your preferences and availability.

  • Which kid-friendly amenities does WestJet have on flights from Ontario to London?

    WestJet offers several kid-friendly amenities on flights from Ontario to London. These amenities include children's entertainment options such as movies, TV shows, and games suitable for different age groups. They also provide complimentary activity packs with coloring books, crayons, and puzzles to keep young travelers engaged during the flight.

  • What are the baggage restrictions when flying Virgin Atlantic from Ontario to London?

    The baggage restrictions when flying Virgin Atlantic from Ontario to London include a checked baggage allowance of two pieces weighing up to 50 lbs each in Economy class. Additionally, passengers are allowed one carry-on bag weighing up to 22 lbs and one personal item such as a laptop or handbag.

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

    Flights from Ontario to London usually depart from Ontario (ONT) and may arrive at 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).

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

    Three cabin classes are available on flights from Ontario to London:

    • Economy Class
    • Premium Economy Class
    • First Class

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

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

    • Dallas/Fort Worth (DFW) - 29% of one-stop connections
    • Denver Intl (DEN) - 20% of one-stop connections
    • Seattle/Tacoma Intl (SEA) - 19% of one-stop connections
    • Phoenix Sky Harbor Intl (PHX) - 14% 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 Ontario to London?

    Yes. Being flexible with your travel dates can save you up to 29% on the Ontario to London route. Friday is the cheapest departure day at $659 round-trip on average, while Sunday is the most expensive at $922, a difference of $263. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in London?

    Some of the most popular sights in London are Paddington Station, Central London and London Victoria Station. These are among the most viewed places in London on KAYAK.

  • How long is a flight from Ontario to London?

    A nonstop flight from Ontario to London takes 0h 00m, covering 5,416 miles.

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

    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 Ontario to London looking right now?

    One-way fares from Ontario to London are currently lower than usual. Average one-way flight prices are about $324, which is 49% below the typical average for this route.

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

    Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 13h 06m, compared with 13h 14m via Denver Intl (DEN) and 13h 34m via Phoenix Sky Harbor Intl (PHX).

  • What is the time difference between Ontario and London?

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

  • What car rental options are available in London?

    Since London is served by multiple airports, car rental options and rates can vary depending on which one you fly into.
    Near London Heathrow Airport (LHR) — daily rates from around $7:

    · GREEN MOTION
    · DRIVALIA
    · Europcar
    · Alamo
    · Hertz

    Near London Gatwick Airport (LGW) — daily rates from around $8:

    · GREEN MOTION
    · DRIVALIA
    · U-Save
    · Europcar
    · Alamo

    Near London City Airport (LCY) — daily rates from around $11:

    · GREEN MOTION
    · Budget
    · Hertz
    · Avis
    · Sixt

    Near London Luton Airport (LTN) — daily rates from around $11:

    · GREEN MOTION
    · DRIVALIA
    · Alamo
    · Europcar
    · Budget

    Near London Stansted Airport (STN) — daily rates from around $10:

    · GREEN MOTION
    · DRIVALIA
    · Europcar
    · Alamo
    · U-Save

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

    Round-trip flights from Ontario to London range from $648 to $1,054, with an average of $792 over the past 12 months. Anything below $648 counts as a good deal.

Your guide to booking Ontario to London 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 Friday departure instead of Sunday. On this route, Friday flights average $659 - about $263 less than Sunday (29% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Ontario to London trip for June. Fares historically average $530 round-trip in that month - typically $797 less than the most expensive month, which is July (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, hotels close to the airport you're flying into can be a convenient option.

    Near London City Airport

    · Good Hotel London
    · Novotel London Excel
    · Aloft London Excel

    Near London Heathrow Airport

    · Hilton London Heathrow Airport

    Near London Gatwick Airport

    · Premier Inn London Gatwick Airport
  • Common layover options for Air Canada flights from Ontario (ONT) to London (LON) may include stopovers in major hub cities such as Toronto, Montreal, or Ottawa. These layovers often provide convenient connections for passengers, allowing them to change planes and continue their journey to London.
  • Additionally, Air Canada offers a special food service called "Chef's Menu" on its flights from Ontario to London. Passengers can enjoy a delectable selection of culinary delights prepared by renowned chefs. The menu features a range of gourmet dishes using fresh, locally sourced ingredients, ensuring a delightful dining experience in the skies. From appetizers to main courses and desserts, Air Canada's Chef's Menu promises to satisfy the taste buds of travelers throughout their journey.
  • Air Canada offers a variety of in-flight entertainment options on its flights from Ontario to London. Passengers can enjoy a selection of movies, TV shows, and music, with a wide range of genres to choose from. Additionally, the airline provides personal screens with touch controls, offering a seamless and enjoyable viewing experience.
  • WestJet assists passengers with disabilities traveling from Ontario to London. They offer wheelchair assistance, accessible seating options, and priority boarding. Passengers can request special services such as mobility aids or medical equipment during their journey. WestJet's trained staff is available to ensure a comfortable and safe travel experience for passengers with disabilities, addressing their specific needs and providing necessary support throughout the journey.
  • You can change your seat when flying with WestJet from Ontario to London. Seat changes are subject to availability, and you can make the change either during the booking process or by accessing your reservation online. Alternatively, you can contact WestJet's customer service for assistance with seat changes.

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

Information on your arrival and departure airports

Ontario (ONT)