Illuminated Independence Square and Hall at night during winter in Philadelphia building where the United States Constitution was signed

฿20,265 Cheap Flights from London (LHR) to Philadelphia (PHL)

View ฿20,265 flight on Mon, 24 Aug 2026Opens in a new window

Popular airlines from Heathrow Airport (LHR) to Philadelphia International Airport (PHL)

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Cheap Flights from London (LHR) to Philadelphia (PHL)

Prices were available within the past 7 days and start at ฿20,265 for one-way flights and ฿25,775 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Mon, 24 Aug - Tue, 22 Sept
LHR
London
PHL
Philadelphia
฿25,775 Return, found 13 hours ago
฿25,775
Return
found 13 hours ago
Select British Airways flight, departing Mon, 24 Aug from London to Philadelphia, returning Tue, 22 Sept, priced at ฿25,775 found 13 hours ago
British Airways
Mon, 24 Aug - Tue, 22 Sept
LHR
London
PHL
Philadelphia
฿25,895 Return, found 13 hours ago
฿25,895
Return
found 13 hours ago
Select British Airways flight, departing Mon, 24 Aug from London to Philadelphia, returning Tue, 22 Sept, priced at ฿25,895 found 13 hours ago
Finnair
Mon, 24 Aug - Tue, 22 Sept
LHR
London
PHL
Philadelphia
฿26,345 Return, found 13 hours ago
฿26,345
Return
found 13 hours ago
Select Finnair flight, departing Mon, 24 Aug from London to Philadelphia, returning Tue, 22 Sept, priced at ฿26,345 found 13 hours ago
British Airways
Mon, 24 Aug - Tue, 22 Sept
LHR
London
PHL
Philadelphia
฿26,390 Return, found 13 hours ago
฿26,390
Return
found 13 hours ago
Select British Airways flight, departing Mon, 24 Aug from London to Philadelphia, returning Tue, 22 Sept, priced at ฿26,390 found 13 hours ago
Finnair
Mon, 24 Aug - Tue, 22 Sept
LHR
London
PHL
Philadelphia
฿26,435 Return, found 13 hours ago
฿26,435
Return
found 13 hours ago
Select Finnair flight, departing Mon, 24 Aug from London to Philadelphia, returning Tue, 22 Sept, priced at ฿26,435 found 13 hours ago
British Airways
Mon, 24 Aug - Tue, 22 Sept
LHR
London
PHL
Philadelphia
฿26,465 Return, found 13 hours ago
฿26,465
Return
found 13 hours ago
Select British Airways flight, departing Mon, 24 Aug from London to Philadelphia, returning Tue, 22 Sept, priced at ฿26,465 found 13 hours ago
American Airlines
Mon, 24 Aug - Tue, 22 Sept
LHR
London
PHL
Philadelphia
฿26,645 Return, found 13 hours ago
฿26,645
Return
found 13 hours ago
Select American Airlines flight, departing Mon, 24 Aug from London to Philadelphia, returning Tue, 22 Sept, priced at ฿26,645 found 13 hours ago
Finnair
Mon, 24 Aug - Tue, 22 Sept
LHR
London
PHL
Philadelphia
฿26,760 Return, found 13 hours ago
฿26,760
Return
found 13 hours ago
Select Finnair flight, departing Mon, 24 Aug from London to Philadelphia, returning Tue, 22 Sept, priced at ฿26,760 found 13 hours ago
Iberia
Mon, 24 Aug - Tue, 22 Sept
LHR
London
PHL
Philadelphia
฿27,905 Return, found 13 hours ago
฿27,905
Return
found 13 hours ago
Select Iberia flight, departing Mon, 24 Aug from London to Philadelphia, returning Tue, 22 Sept, priced at ฿27,905 found 13 hours ago
Air Canada
Mon, 24 Aug - Tue, 22 Sept
LHR
London
PHL
Philadelphia
฿29,425 Return, found 13 hours ago
฿29,425
Return
found 13 hours ago
Select Air Canada flight, departing Mon, 24 Aug from London to Philadelphia, returning Tue, 22 Sept, priced at ฿29,425 found 13 hours ago

Find the cheapest month to fly from London (LHR) to Philadelphia (PHL)

November is typically the cheapest month to fly

From ฿23,425 - ฿29,586 per traveller.

Frequently asked questions

How much is a flight from London Heathrow to Philadelphia Intl. Airport (PHL)?
Based on fares advertised within the last 7 days on Expedia for flights departing within the next year, round-trip flights from LHR to Philadelphia Intl. Airport (PHL) start from ฿25,775. Book now to score the best price for your journey. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Heathrow Airport to Philadelphia Intl. Airport (PHL)?
Each air carrier has its own terms and conditions. If you do decide to cancel, follow the simple instructions on our Customer Service Portal.
How do I find cheap flights from Heathrow Airport to Philadelphia 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 to Philadelphia Intl. Airport (PHL) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Heathrow Airport (LHR) to PHL?
With around 5,700 kilometres separating LHR and Philadelphia Airport, your flight will be a long one. Pack wisely and make your time on board comfortable. Little things like an extra pair of socks and a good travel pillow can make a huge difference.
Which airlines fly direct from Heathrow Airport to Philadelphia Airport?
There are several airlines that fly straight from London Heathrow to Philadelphia Intl. Airport (PHL). British Airways (BA) is a top choice, offering 30 flights every month. Another carrier operating on this route is American Airlines (AA). You'll have 26 flights a month to take your pick of.
Are Heathrow Airport (LHR) to PHL flight tickets cheaper when they're purchased at the last minute?
Last-minute planners can sometimes pick up a bargain, with some super cheap airfares from Heathrow Airport to Philadelphia Intl. Airport (PHL) appearing a few weeks before the departure date. If you'd rather book ahead, Expedia compares and updates all the best flight deals regularly — as early as 12 months in advance in some cases. It does depend on the carrier though, as not all airlines issue prices that far in advance.

Travel information

Origin airport
Heathrow
Destination airport
Philadelphia Intl.
Airlines serving
Air Canada, American Airlines, British Airways, Delta, Finnair, Iberia, KLM, United
Return price
฿25,775
Distance
5656 km
Average flight time
2 hours 55 mins

Book with confidence

Perfect flights from London to Philadelphia

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from London to Philadelphia. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Heathrow to Philadelphia Intl. ticket options cater to your travel preferences, with incredible one-way fares from ฿20,265 and roundtrip prices from ฿25,775. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Philadelphia Intl. and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in Philadelphia.
Perfect flights from London to Philadelphia
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