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£401 Cheap Flights from London (LHR) to Philadelphia (PHL)

View £401 flight on Tue, 24 Nov 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 £401 for one-way flights and £458 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, 7 Nov - Sun, 8 Nov
LHR
London
PHL
Philadelphia
£458 Return, found 1 day ago
£458
Return
found 1 day ago
Select United flight, departing Sat, 7 Nov from London to Philadelphia, returning Sun, 8 Nov, priced at £458 found 1 day ago
Aer Lingus
Fri, 23 Oct - Tue, 27 Oct
LHR
London
PHL
Philadelphia
£520 Return, found 5 hours ago
£520
Return
found 5 hours ago
Select Aer Lingus flight, departing Fri, 23 Oct from London to Philadelphia, returning Tue, 27 Oct, priced at £520 found 5 hours ago
Aer Lingus
Thu, 1 Oct - Mon, 5 Oct
LHR
London
PHL
Philadelphia
£521 Return, found 11 hours ago
£521
Return
found 11 hours ago
Select Aer Lingus flight, departing Thu, 1 Oct from London to Philadelphia, returning Mon, 5 Oct, priced at £521 found 11 hours ago
Aer Lingus
Thu, 1 Oct - Sun, 4 Oct
LHR
London
PHL
Philadelphia
£528 Return, found 2 hours ago
£528
Return
found 2 hours ago
Select Aer Lingus flight, departing Thu, 1 Oct from London to Philadelphia, returning Sun, 4 Oct, priced at £528 found 2 hours ago
Lufthansa
Wed, 7 Oct - Wed, 14 Oct
LHR
London
PHL
Philadelphia
£555 Return, found 4 hours ago
£555
Return
found 4 hours ago
Select Lufthansa flight, departing Wed, 7 Oct from London to Philadelphia, returning Wed, 14 Oct, priced at £555 found 4 hours ago
American Airlines
Tue, 1 Dec - Tue, 2 Feb
LHR
London
PHL
Philadelphia
£572 Return, found 1 day ago
£572
Return
found 1 day ago
Select American Airlines flight, departing Tue, 1 Dec from London to Philadelphia, returning Tue, 2 Feb, priced at £572 found 1 day ago
British Airways
Tue, 10 Nov - Tue, 17 Nov
LHR
London
PHL
Philadelphia
£578 Return, just found
£578
Return
just found
Select British Airways flight, departing Tue, 10 Nov from London to Philadelphia, returning Tue, 17 Nov, priced at £578 just found
Air Canada
Wed, 4 Nov - Tue, 10 Nov
LHR
London
PHL
Philadelphia
£579 Return, found 4 hours ago
£579
Return
found 4 hours ago
Select Air Canada flight, departing Wed, 4 Nov from London to Philadelphia, returning Tue, 10 Nov, priced at £579 found 4 hours ago
JetBlue Airways
Tue, 10 Nov - Tue, 17 Nov
LHR
London
PHL
Philadelphia
£582 Return, just found
£582
Return
just found
Select JetBlue Airways flight, departing Tue, 10 Nov from London to Philadelphia, returning Tue, 17 Nov, priced at £582 just found
Brussels Airlines
Wed, 7 Oct - Wed, 14 Oct
LHR
London
PHL
Philadelphia
£586 Return, found 4 hours ago
£586
Return
found 4 hours ago
Select Brussels Airlines flight, departing Wed, 7 Oct from London to Philadelphia, returning Wed, 14 Oct, priced at £586 found 4 hours ago

Alternative airports near Philadelphia

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Philadelphia Intl. PHL. Cheapest and Closest option available. Average driving time to city centre is 17 minutes. Flights from £624
PHL
Philadelphia Intl.
CheapestClosest
Average driving time to city centre17 min
Flights from £624

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

October is typically the cheapest month to fly

From £448 - £678 per traveller.

Frequently asked questions

How much does a flight from London (LHR-Heathrow) to Philadelphia, PA (PHL-Philadelphia Intl.) cost?
You can find cheap one-way flights from £401 and cheap return flights from £458 LHR to PHL with Expedia. One-way flights typically cost between £489 and £2620, and return flights often range between £587 and £3149. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when LHR to PHL ticket fares go up or down.
What is the cheapest month to fly from London (LHR-Heathrow) to Philadelphia, PA (PHL-Philadelphia Intl.)?
The cheapest months to fly from LHR to PHL are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from London (LHR-Heathrow) to Philadelphia, PA (PHL-Philadelphia Intl.)?
There are 2 airlines offering direct flights from London Heathrow (LHR) to Philadelphia, PA (PHL-Philadelphia Intl.).
  • American Airlines operates 14 direct flights from London Heathrow (LHR) to Philadelphia, PA (PHL-Philadelphia Intl.) every week.
  • British Airways operates 7 direct flights from London Heathrow (LHR) to Philadelphia, PA (PHL-Philadelphia Intl.) every week.
How do I find cheap flights from London (LHR) to Philadelphia, PA (PHL)?
To find a cheap flight from London (LHR) to Philadelphia, PA (PHL), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from London (LHR-Heathrow) to Philadelphia, PA (PHL-Philadelphia Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from London (LHR-Heathrow) to Philadelphia, PA (PHL-Philadelphia Intl.)?
The earliest flight from London Heathrow (LHR) to Philadelphia, PA (PHL-Philadelphia Intl.) typically departs around 6:00 AM local time. This service is operated by Air Canada and is seasonal, active only in July. An early departure like this allows you to maximise your time in Philadelphia. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from London (LHR-Heathrow) to Philadelphia, PA (PHL-Philadelphia Intl.)?
A non-stop flight from London Heathrow (LHR) to Philadelphia, PA (PHL-Philadelphia Intl.) typically takes around 8 hours, covering a distance of approximately 5,691 kilometers. If you opt for a flight with one stop, your journey will usually take longer, averaging around 13 hours 18 minutes. Flights with two or more stops will extend your travel time even further, typically to about 18 hours 18 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some flexibility in your travel plans.
Can you fly business or first class from London (LHR) to Philadelphia, PA (PHL)?
Select the "Business class" and "First class" filters when looking for London (LHR) to Philadelphia, PA (PHL) flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How much is a business class flight from London (LHR-Heathrow) to Philadelphia, PA (PHL-Philadelphia Intl.)?
A direct, return business class ticket from London Heathrow (LHR) to Philadelphia, PA (PHL) typically costs between £3,436 - £5,829. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between London Heathrow (LHR) to Philadelphia, PA (PHL) if you opt for a connecting flight.
How do I earn miles on a London (LHR-Heathrow) to Philadelphia, PA (PHL-Philadelphia Intl.) flight with Expedia?
It's easy to earn miles on a London (LHR-Heathrow) to Philadelphia, PA (PHL-Philadelphia Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Philadelphia, PA (PHL) from London (LHR)?
If you're planning to travel to Philadelphia from Heathrow (LHR), you can fly directly into Philadelphia Intl. (PHL). Some flights may connect through major hubs like Zürich (ZRH), Roissy-Charles de Gaulle (CDG), or Brussels - National (BRU) before reaching Philadelphia. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from London (LHR-Heathrow) to Philadelphia, PA (PHL-Philadelphia Intl.) at the last minute?
Typically, booking a last minute flight from London (LHR-Heathrow) to Philadelphia, PA (PHL-Philadelphia Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a London (LHR-Heathrow) to Philadelphia, PA (PHL-Philadelphia Intl.) flight and hotel package?
Securing a London (LHR-Heathrow) to Philadelphia, PA (PHL-Philadelphia Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from London (LHR) to Philadelphia, PA (PHL)?
If you booked your London (LHR) to Philadelphia, PA (PHL) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

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
Return price
£458
Distance
5656 km
Average flight time
2 hours 56 mins

Book with confidence

Compare flights from London to Philadelphia easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from London to Philadelphia. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Philadelphia Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Heathrow to Philadelphia Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Heathrow (LHR) to Philadelphia Intl. (PHL)

The easiest way to view the best deals on flights from London to Philadelphia today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Heathrow to Philadelphia Intl. start at just £458 and range up to £586.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near London and Philadelphia
  • booking your flight during November, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your London to Philadelphia flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Heathrow to Philadelphia Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from London to Philadelphia easily and book with confidence

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*Available to Expedia members.