$433 Cheap Flights from Ontario (ONT) to London (LHR)

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Cheap Flights from Ontario to London (ONT-LHR)

Prices were available within the past 7 days and start at $433 for one-way flights and $519 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

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Flights from Ontario (ONT) to London (LHR)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Heathrow
Airlines serving
Air Canada, Air France, American Airlines, British Airways, Delta, Iberia, JetBlue Airways, KLM, United, Virgin Atlantic
Roundtrip price
$518
Distance
5409 mi

Ontario to London Flights

Whether you’re looking for a grand adventure or just want to get away for a last-minute break, flights from Ontario to London offer the perfect respite. Not only does exploring London provide the chance to make some magical memories, dip into delectable dishes, and tour the local landmarks, but the cheap airfare means you won’t bust your budget. So no matter whether your ideal itinerary involves flying one way, non-stop, or round trip, you’re bound to find flights that match your schedule on Expedia, and at prices that won’t shock your wallet.

Bagging a cheap flight from Ontario to London may mean more dollars to spend on for one-of-a-kind souvenirs when you arrive, but it doesn’t mean you have to skimp on your travel experience, as Expedia offers a sizzling selection of cheap airlines that’ll put you in your happy place on their planes, whether that’s getting lost in a hair-raising airport thriller, dreaming on the passing landscape over a glass of bubbly, or jotting down your vacation bucket list at 38,000 feet. There’s also bound to be plenty of opportunities to snap a few photos of the high life that will make your friends green with envy. After all, enjoying the journey is part of the fun.

With so many affordable flights and so many wonderful adventures awaiting you, there’s no reason to put off booking a fantastic flight from to today. So don’t leave it to the last minute to make your dream trip a reality: pack your bags with your go-to travel accessories, put together your list of must-see attractions and can’t-miss activities, and get ready to broaden your horizons – with Expedia, the wonders of London are only a plane trip away. Book your travel arrangements with us today!

If you would like to book flights to London more flexibly many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to London is $433 now!

Frequently asked questions

How much is a one-way flight from ONT to Heathrow Airport?
You can find one-way Ontario flights to London starting from only $511. This is based on the cheapest fare located on Expedia for this route departing during the next three months and was updated on May 20 2024 and has not changed since. This specific fare is for an JetBlue Airways service, setting off from Los Angeles - Ontario Intl. Airport (ONT) on July 17 2024 and landing at Heathrow Airport (LHR).
Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to Heathrow Airport last minute?
When it comes to booking your flights, being prepared pays dividends. While you may be able to find a deal on an ONT to London Heathrow flight at the last minute, fares usually don’t get cheaper as the date of departure nears. Based on flight pricing and demand studies in 2022, we have found that the sweet spot to lock in a domestic flight is between 28 – 35 days in advance. For international flights it’s three to four months.
What is the cheapest airline flying from Los Angeles - Ontario Intl. Airport (ONT) to Heathrow Airport (LHR) in the next 90 days?
With plane tickets starting at $511 for a flight from Ontario to London, JetBlue Airways is the cheapest airline found on Expedia. This deal is based on airfares found on Expedia with a departure date within the next 90 days and was last updated on May 20 2024 and has not changed since. The flight takes off from Ontario Airport on July 17 2024 and arrives at Heathrow Airport.
What's the cheapest price for a flight from Los Angeles - Ontario Intl. Airport (ONT) to Heathrow Airport (LHR) next month?
With a one-way flight from Ontario to London coming in at just $849, you’ll have more moolah left in your hand for fun stuff like sightseeing. This airfare was found after looking at all available flights on Expedia within the next 30 days. This particular service jets off from Ontario Airport on June 2 2024, arrives at Heathrow Airport and is operated by JetBlue Airways. The price of this airfare was last updated on May 20 2024 and has not changed since.
What airports do you fly into for London from Los Angeles?
From Los Angeles, you can fly into London via Heathrow Airport (LHR), London City Airport (LCY) and Gatwick Airport (LGW). Be sure to check which terminal works best for you before making your decision. If you settle on Heathrow Airport (LHR), it’s roughly 14 mi west of downtown. Use the dough you save when booking your ticket with Expedia to experience the city’s top attractions, such as Buckingham Palace and Big Ben.
Can I change the date of my flight from ONT to London Heathrow?
You can quickly make changes to your ONT to Heathrow Airport ticket via the Expedia Trips portal. But before amending dates or times, check out the rules and restrictions in your itinerary to learn what the airline will let you do and what charges may apply. Some airlines charge a change fee per person, plus any difference in fare prices. However, if you booked in the last 24 hours, you may be able to cancel for free and organize new flights. You can also check out our Customer Service portal for more information and to connect with our Virtual Agent.
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