NT$18,687 Cheap Flights from London (LHR) to Ontario (ONT)

View NT$18,687 flight on Tue, 2027/1/12Opens in a new window

Popular airlines from Heathrow Airport (LHR) to Los Angeles - Ontario Intl. Airport (ONT)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 45% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from London to Ontario (LHR-ONT)

Prices were available within the past 7 days and start at NT$18,687 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much is a flight from LHR to Ontario Airport?
Start packing your bags, because round-trip flights between London Heathrow and ONT start from . That's based on fares listed within the last 7 days on Expedia for flights departing within the next year. Prices can rise quickly, so book now to nab the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from LHR to ONT?
The majority of flights can be canceled online, but whether you are charged a fee depends on your airline. If you do need to cancel your getaway, follow the instructions in the Customer Service Portal.
How do I find cheap flights from London Heathrow to Ontario Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Heathrow Airport (LHR) to Ontario Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Heathrow Airport (LHR) to Ontario Airport?
Hounslow to Ontario is around 8,700 kilometers, so get ready to spend quite a while in the air. Make sure you pack all the essentials, from your hoodie to your headphones. Take some snacks to nibble on throughout your trip too.
Which airlines fly direct from Heathrow Airport to Ontario Airport?
At the moment, no airlines offer flights directly from Heathrow Airport to ONT. You'll have to book a flight with one or more stops. To score the best price and connections, lock in your airfare well ahead of time.
Are LHR to Los Angeles - Ontario Intl. Airport (ONT) flight tickets cheaper when they're purchased at the last minute?
Last-minute bookings from Heathrow Airport (LHR) to Ontario Airport can be hit-or-miss. You may be able to find a bargain, but then again, you could miss out altogether! If you'd prefer to start planning your trip ahead of time, Expedia compares flight deals up to a year in advance. Just keep in mind that not all airlines issue their prices that far in advance. Our top tip? Check back often as prices are updated frequently.

Travel information

Origin airport
Heathrow
Destination airport
Los Angeles - Ontario Intl.
Distance
8655 km

Explore a world of travel with Expedia

*Available to Expedia members.