€278 Cheap Flights Philadelphia to London (PHL-LHR)

View €278 flight on Thu, 6 Nov 2025Opens in a new window

Popular airlines from Philadelphia Intl. Airport (PHL) to Heathrow Airport (LHR)

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Cheap flights from Philadelphia to London (PHL-LHR)

Prices were available within the past 7 days and start at €278 for one-way flights and €411 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Sun, 7 Dec - Tue, 16 Dec
PHL
Philadelphia
LHR
London
€411 Return, found 2 days ago
€411
Return
found 2 days ago
Select Aer Lingus flight, departing Sun, 7 Dec from Philadelphia to London, returning Tue, 16 Dec, priced at €411 found 2 days ago
Aer Lingus
Mon, 8 Sep - Thu, 18 Sep
PHL
Philadelphia
LHR
London
€413 Return, found 3 days ago
€413
Return
found 3 days ago
Select Aer Lingus flight, departing Mon, 8 Sep from Philadelphia to London, returning Thu, 18 Sep, priced at €413 found 3 days ago
American Airlines
Wed, 22 Oct - Wed, 5 Nov
PHL
Philadelphia
LHR
London
€423 Return, found 1 day ago
€423
Return
found 1 day ago
Select American Airlines flight, departing Wed, 22 Oct from Philadelphia to London, returning Wed, 5 Nov, priced at €423 found 1 day ago
American Airlines
Wed, 22 Oct - Wed, 5 Nov
PHL
Philadelphia
LHR
London
€425 Return, found 1 day ago
€425
Return
found 1 day ago
Select American Airlines flight, departing Wed, 22 Oct from Philadelphia to London, returning Wed, 5 Nov, priced at €425 found 1 day ago
American Airlines
Wed, 22 Oct - Wed, 5 Nov
PHL
Philadelphia
LHR
London
€428 Return, found 1 day ago
€428
Return
found 1 day ago
Select American Airlines flight, departing Wed, 22 Oct from Philadelphia to London, returning Wed, 5 Nov, priced at €428 found 1 day ago
Iberia
Mon, 8 Sep - Thu, 18 Sep
PHL
Philadelphia
LHR
London
€442 Return, found 3 days ago
€442
Return
found 3 days ago
Select Iberia flight, departing Mon, 8 Sep from Philadelphia to London, returning Thu, 18 Sep, priced at €442 found 3 days ago
British Airways
Wed, 22 Oct - Wed, 5 Nov
PHL
Philadelphia
LHR
London
€443 Return, found 1 day ago
€443
Return
found 1 day ago
Select British Airways flight, departing Wed, 22 Oct from Philadelphia to London, returning Wed, 5 Nov, priced at €443 found 1 day ago
Virgin Atlantic
Wed, 22 Oct - Wed, 5 Nov
PHL
Philadelphia
LHR
London
€448 Return, found 1 day ago
€448
Return
found 1 day ago
Select Virgin Atlantic flight, departing Wed, 22 Oct from Philadelphia to London, returning Wed, 5 Nov, priced at €448 found 1 day ago
Delta
Wed, 22 Oct - Wed, 5 Nov
PHL
Philadelphia
LHR
London
€448 Return, found 1 day ago
€448
Return
found 1 day ago
Select Delta flight, departing Wed, 22 Oct from Philadelphia to London, returning Wed, 5 Nov, priced at €448 found 1 day ago
Air France
Wed, 22 Oct - Wed, 5 Nov
PHL
Philadelphia
LHR
London
€486 Return, found 1 day ago
€486
Return
found 1 day ago
Select Air France flight, departing Wed, 22 Oct from Philadelphia to London, returning Wed, 5 Nov, priced at €486 found 1 day ago

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

November is typically the cheapest month to fly

From €410 - €718 per traveller.

Graph displaying average flight prices per month

Philadelphia to London route information
Origin airport
Philadelphia Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, British Airways, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, United, Virgin Atlantic
Return price
€411
Distance
5656 km
Average flight time
12 hours 8 mins

Perfect flights from Philadelphia to London

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from Philadelphia to London. 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 London, 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 Philadelphia Intl. to Heathrow ticket options cater to your travel preferences, with incredible one-way fares from €278 and roundtrip prices from €411. 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 Heathrow and explore London 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 PHL to LHR travel arrangements today and embark on the journey of a lifetime in London.

Frequently asked questions

How much is a flight from PHL to London Heathrow?
The lowest price advertised for a round-trip journey from Philadelphia Intl. Airport (PHL) to LHR is €411. But you better move fast. This price is taken from fares quoted within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Philadelphia Intl. Airport (PHL) to Heathrow Airport?
Most flights can be cancelled online, but each air carrier has its own set of terms and conditions. If you do decide to cancel your flight, visit our Customer Service Portal and follow the instructions.
How do I find cheap flights from Philadelphia Intl. Airport (PHL) to Heathrow Airport (LHR) 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 Philadelphia Airport to LHR flights, you'll see a "no change fees" filter for you to select.
How far is the flight from PHL to LHR?
With a flight distance of 5,700 kilometres between Philadelphia and Hounslow, this is a long-haul journey. Be sure to stay hydrated and take a short walk down the aisle from time to time.
Which airlines fly direct from Philadelphia Airport to Heathrow Airport?
A leading airline that operates on the route from PHL to London Heathrow is British Airways (BA). It offers 30 flights every month. Another airline operating on this route is American Airlines (AA). You'll have 26 flights a month to select from.
Are Philadelphia Intl. Airport (PHL) to Heathrow Airport (LHR) flight tickets cheaper when they're purchased at the last minute?
Booking your trip from Philadelphia Intl. Airport (PHL) to Heathrow Airport (LHR) at the last minute could be your ticket to a great deal. However, it might cost you a whole lot more! If you'd rather avoid the risk, book well ahead of your departure date. In fact, Expedia has some of the best bargains up to 12 months in advance. If your preferred air carrier hasn't released tickets yet, check back often as deals are updated all the time on Expedia.

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