$348 Cheap Flights from London (LHR) to Philadelphia (PHL)

View $348 flight on Wed, May 6, 2026Opens 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 $348 for one-way flights and $595 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Tue, Feb 3 - Tue, Feb 17
LHR
London
PHL
Philadelphia
$595 Roundtrip, found 2 hours ago
$595
Roundtrip
found 2 hours ago
Select JetBlue Airways flight, departing Tue, Feb 3 from London to Philadelphia, returning Tue, Feb 17, priced at $595 found 2 hours ago
JetBlue Airways
Wed, Dec 3 - Mon, Dec 8
LHR
London
PHL
Philadelphia
$597 Roundtrip, found 3 days ago
$597
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Wed, Dec 3 from London to Philadelphia, returning Mon, Dec 8, priced at $597 found 3 days ago
JetBlue Airways
Wed, Mar 11 - Mon, Mar 16
LHR
London
PHL
Philadelphia
$600 Roundtrip, found 6 hours ago
$600
Roundtrip
found 6 hours ago
Select JetBlue Airways flight, departing Wed, Mar 11 from London to Philadelphia, returning Mon, Mar 16, priced at $600 found 6 hours ago
Air Canada
Fri, Feb 13 - Tue, Feb 17
LHR
London
PHL
Philadelphia
$649 Roundtrip, found 1 day ago
$649
Roundtrip
found 1 day ago
Select Air Canada flight, departing Fri, Feb 13 from London to Philadelphia, returning Tue, Feb 17, priced at $649 found 1 day ago
British Airways
Wed, Dec 3 - Thu, Dec 11
LHR
London
PHL
Philadelphia
$663 Roundtrip, found 7 hours ago
$663
Roundtrip
found 7 hours ago
Select British Airways flight, departing Wed, Dec 3 from London to Philadelphia, returning Thu, Dec 11, priced at $663 found 7 hours ago
Iberia
Fri, Feb 13 - Tue, Feb 17
LHR
London
PHL
Philadelphia
$664 Roundtrip, found 1 day ago
$664
Roundtrip
found 1 day ago
Select Iberia flight, departing Fri, Feb 13 from London to Philadelphia, returning Tue, Feb 17, priced at $664 found 1 day ago
Aer Lingus
Mon, Dec 8 - Mon, Dec 15
LHR
London
PHL
Philadelphia
$683 Roundtrip, found 5 hours ago
$683
Roundtrip
found 5 hours ago
Select Aer Lingus flight, departing Mon, Dec 8 from London to Philadelphia, returning Mon, Dec 15, priced at $683 found 5 hours ago
American Airlines
Mon, Feb 2 - Wed, Feb 18
LHR
London
PHL
Philadelphia
$683 Roundtrip, found 2 hours ago
$683
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Mon, Feb 2 from London to Philadelphia, returning Wed, Feb 18, priced at $683 found 2 hours ago
United
Tue, Dec 2 - Wed, Dec 24
LHR
London
PHL
Philadelphia
$684 Roundtrip, found 6 days ago
$684
Roundtrip
found 6 days ago
Select United flight, departing Tue, Dec 2 from London to Philadelphia, returning Wed, Dec 24, priced at $684 found 6 days ago
Brussels Airlines
Fri, Feb 13 - Tue, Feb 17
LHR
London
PHL
Philadelphia
$688 Roundtrip, found 1 day ago
$688
Roundtrip
found 1 day ago
Select Brussels Airlines flight, departing Fri, Feb 13 from London to Philadelphia, returning Tue, Feb 17, priced at $688 found 1 day ago

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

February is typically the cheapest month to fly

From $477 - $952 per traveler.

Frequently asked questions

How much does a flight from Heathrow Airport (LHR) to Philadelphia Intl. Airport (PHL) cost?
Lock in a cheap one-way flight from $348 or cheap return flight from $595 from Heathrow Airport (LHR) to Philadelphia Intl. Airport (PHL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Heathrow Airport (LHR) to Philadelphia Intl. Airport (PHL)?
February is the least expensive month to fly from LHR to PHL. Timing your trip outside of the busy season is often the key to finding better deals on flights.
Which airlines fly direct from Heathrow Airport (LHR) to Philadelphia Intl. Airport (PHL)?
Fly directly from Heathrow Airport (LHR) to Philadelphia Intl. Airport (PHL) on a British Airways flight.
What is the cheapest airline that flies from Heathrow Airport (LHR) to Philadelphia Intl. Airport (PHL)?
British Airways and American Airlines are some well-known airlines offering reasonable fares. Keep in mind that flight prices from Heathrow Airport (LHR) to Philadelphia Intl. Airport (PHL) can vary depending on travel dates, demand and how early you book. With Expedia's search tool, you can easily find a LHR to PHL flight that works with your plans and budget.
How many flights per day from Heathrow Airport (LHR) to Philadelphia Intl. Airport (PHL)?
With an average of 2 nonstop flights that operate from Heathrow Airport (LHR) to Philadelphia Intl. Airport (PHL) every day, you'll be soaring through the skies in no time.
What are the most popular departure times for flights from Heathrow Airport (LHR) to Philadelphia Intl. Airport (PHL)?
Flights between LHR and PHL tend to be busiest at 10 AM. If you want a more relaxed experience and possibly cheaper fares, look for a time when demand is lower.
What day of the week has the most flights from LHR to PHL?
If you fly on a Thursday, you'll get the widest range of options for flights from Heathrow Airport (LHR) to Philadelphia Intl. Airport (PHL).
What is the earliest flight from Heathrow Airport (LHR) to Philadelphia Intl. Airport (PHL)?
Heathrow Airport (LHR)'s earliest flight to Philadelphia Intl. Airport (PHL) leaves at approximately 10:15AM UTC+0. With a flight time of 8h 15m, you'll land at around 1:30PM UTC-5.
How long does it take to fly from Heathrow Airport (LHR) to Philadelphia Intl. Airport (PHL)?
Flights from LHR to PHL have an average travel time of 8 hours and 12 minutes. The distance between the two airports is 3,500 mi.
What is the best time to fly from Heathrow Airport (LHR) to Philadelphia Intl. Airport (PHL)?
To arrive at Philadelphia Intl. Airport (PHL) on schedule, select a flight that leaves Heathrow Airport (LHR) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Philadelphia from Heathrow Airport (LHR)?
If you're boarding a direct flight from Heathrow Airport (LHR) to Philadelphia, Philadelphia Intl. Airport (PHL) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Heathrow Airport (LHR) to Philadelphia Intl. Airport (PHL) last-minute?
Booking your flight from LHR to PHL right before your journey is typically more expensive. But if you're flexible with your travel times and dates, you could score a cheap last-minute fare.
Is it cheaper to book a LHR to PHL flight and hotel package?
Compared with arranging flights and hotels separately, booking a LHR to PHL flight and hotel package with Expedia could result in significant savings. Better still, managing everything in one place will take the stress out of travel planning. Simply secure your flights and choose from our wide range of stays, then tailor your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Heathrow Airport (LHR) to Philadelphia Intl. Airport (PHL)?
Typically, you're able to cancel or reschedule your LHR to PHL flight. However, there may be additional fees, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you want more details, head to our Customer Service portal.

Travel information

Origin airport
Heathrow
Destination airport
Philadelphia Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, United, Virgin Atlantic
Roundtrip price
$595
Distance
3535 mi
Average flight time
3 hours 7 mins

Book with confidence

London to Philadelphia Flights

The cheapest times to fly from London to Philadelphia

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from London to Philadelphia are during the month of February. You can find some of the cheapest flights from London to Philadelphia with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from London to Philadelphia

Sunday is one of the best days to book for cheap flights from London to Philadelphia: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from London to Philadelphia

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from London to Philadelphia in 2025. You can also book with separate airlines for your outbound and return journeys, from $348 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap London to Philadelphia flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your London to Philadelphia airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

London to Philadelphia Flights

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