S$1,421 Cheap Flights from London to Philadelphia

View S$1,421 flight on Sun, 17 Aug, 2025Opens in a new window

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

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Cheap Flights from London to Philadelphia (LHR-PHL)

Prices were available within the past 7 days and start at S$1,421 for one-way flights and S$913 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, 1 Jul - Tue, 15 Jul
LHR
London
PHL
Philadelphia
S$913 Return, found 5 days ago
S$913
Return
found 5 days ago
Select United flight, departing Tue, 1 Jul from London to Philadelphia, returning Tue, 15 Jul, priced at S$913 found 5 days ago
Air Canada
Tue, 1 Jul - Tue, 15 Jul
LHR
London
PHL
Philadelphia
S$927 Return, found 5 days ago
S$927
Return
found 5 days ago
Select Air Canada flight, departing Tue, 1 Jul from London to Philadelphia, returning Tue, 15 Jul, priced at S$927 found 5 days ago
American Airlines
Tue, 1 Jul - Tue, 15 Jul
LHR
London
PHL
Philadelphia
S$928 Return, found 5 days ago
S$928
Return
found 5 days ago
Select American Airlines flight, departing Tue, 1 Jul from London to Philadelphia, returning Tue, 15 Jul, priced at S$928 found 5 days ago
United
Tue, 1 Jul - Tue, 15 Jul
LHR
London
PHL
Philadelphia
S$932 Return, found 5 days ago
S$932
Return
found 5 days ago
Select United flight, departing Tue, 1 Jul from London to Philadelphia, returning Tue, 15 Jul, priced at S$932 found 5 days ago
United
Tue, 1 Jul - Tue, 15 Jul
LHR
London
PHL
Philadelphia
S$935 Return, found 5 days ago
S$935
Return
found 5 days ago
Select United flight, departing Tue, 1 Jul from London to Philadelphia, returning Tue, 15 Jul, priced at S$935 found 5 days ago
Virgin Atlantic
Tue, 1 Jul - Tue, 15 Jul
LHR
London
PHL
Philadelphia
S$935 Return, found 5 days ago
S$935
Return
found 5 days ago
Select Virgin Atlantic flight, departing Tue, 1 Jul from London to Philadelphia, returning Tue, 15 Jul, priced at S$935 found 5 days ago
Delta
Tue, 1 Jul - Tue, 15 Jul
LHR
London
PHL
Philadelphia
S$940 Return, found 5 days ago
S$940
Return
found 5 days ago
Select Delta flight, departing Tue, 1 Jul from London to Philadelphia, returning Tue, 15 Jul, priced at S$940 found 5 days ago
American Airlines
Tue, 1 Jul - Tue, 15 Jul
LHR
London
PHL
Philadelphia
S$942 Return, found 5 days ago
S$942
Return
found 5 days ago
Select American Airlines flight, departing Tue, 1 Jul from London to Philadelphia, returning Tue, 15 Jul, priced at S$942 found 5 days ago
Finnair
Tue, 1 Jul - Tue, 15 Jul
LHR
London
PHL
Philadelphia
S$943 Return, found 5 days ago
S$943
Return
found 5 days ago
Select Finnair flight, departing Tue, 1 Jul from London to Philadelphia, returning Tue, 15 Jul, priced at S$943 found 5 days ago
American Airlines
Tue, 1 Jul - Tue, 15 Jul
LHR
London
PHL
Philadelphia
S$944 Return, found 5 days ago
S$944
Return
found 5 days ago
Select American Airlines flight, departing Tue, 1 Jul from London to Philadelphia, returning Tue, 15 Jul, priced at S$944 found 5 days ago

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

February is typically the cheapest month to fly

From S$611 - S$1,261 per traveller.

Graph displaying average flight prices per month

London to Philadelphia route information
Origin airport
Heathrow
Destination airport
Philadelphia Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, British Airways, Delta, Finnair, Iberia, KLM, Lufthansa, United, Virgin Atlantic
Return price
S$913
Distance
5656 km
Average flight time
2 hours 55 mins

Perfect flights from London to Philadelphia

Your Journey from London to Philadelphia

Start your unforgettable journey with Expedia. Our broad selection of flights from London to Philadelphia caters to every travel need. Whether you're yearning for a romantic escape, a solo adventure, or a cultural immersion, we've got you covered.
 

Choosing Your Ideal Flight

With Expedia, you have access to a wide range of airlines, including United, Air Canada, American Airlines, Virgin Atlantic, Delta, Finnair, Lufthansa, British Airways. Our selection of flights from Heathrow to Philadelphia Intl. caters to every traveler's requirements, ensuring your journey aligns with your schedule. With options from 20 airlines, you're bound to find the perfect flight.
 

Maximizing Value with London to Philadelphia Flights

Experience the joy of finding cheap flights from Heathrow to Philadelphia Intl. that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from S$1,421 and roundtrip prices from S$913*.
 

Pre-Flight Essentials

Ensure a smooth journey from London to Philadelphia with Expedia. From information about check-in times and in-flight amenities to guidance on baggage policies, we provide all the essentials to prepare you for your flight.
 

Experience the Vibrant Philadelphia

Picture yourself stepping off the plane in Philadelphia and immersing yourself in the unique atmosphere of Philadelphia. From local markets to cultural festivals, each city offers its distinct charm. Make the most of your trip by exploring local attractions and indulging in the local cuisine. With Expedia, explore all this and more, tailored to your budget.
 

Added Convenience on Your London to Philadelphia Flight

Traveling with Expedia is more than just a flight. We offer details about in-flight amenities, baggage policies, and more to ensure a smooth and hassle-free journey. Choose from our variety of airlines and embark on a memorable journey from London to Philadelphia.
 

Beyond the Flight – Exploring Philadelphia

With Expedia, your adventure extends beyond the flight. Explore Philadelphia at your own pace by renting a car or booking a hotel. Discover hidden gems off the beaten path and create unforgettable memories.
 

Book Your Flight from London to Philadelphia with Confidence

Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support make your travel experience seamless and stress-free. Embark on your journey from London to Philadelphia with confidence. Book your travel arrangements with Expedia today.
 
*Note: Prices may vary based on availability and are subject to change.

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 S$913. 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.

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