£241 Cheap Flights from Philadelphia (PHL) to London (LHR)

View £241 flight on Mon, 20 Jul 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at £241 for one-way flights and £607 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Mon, 26 Oct - Wed, 4 Nov
PHL
Philadelphia
LHR
London
£607 Return, found 1 day ago
£607
Return
found 1 day ago
Select British Airways flight, departing Mon, 26 Oct from Philadelphia to London, returning Wed, 4 Nov, priced at £607 found 1 day ago
Scandinavian Airlines
Wed, 19 Aug - Wed, 26 Aug
PHL
Philadelphia
LHR
London
£643 Return, found 5 days ago
£643
Return
found 5 days ago
Select Scandinavian Airlines flight, departing Wed, 19 Aug from Philadelphia to London, returning Wed, 26 Aug, priced at £643 found 5 days ago
British Airways
Mon, 9 Nov - Tue, 17 Nov
PHL
Philadelphia
LHR
London
£645 Return, found 4 days ago
£645
Return
found 4 days ago
Select British Airways flight, departing Mon, 9 Nov from Philadelphia to London, returning Tue, 17 Nov, priced at £645 found 4 days ago
JetBlue Airways
Mon, 26 Oct - Wed, 4 Nov
PHL
Philadelphia
LHR
London
£649 Return, found 1 day ago
£649
Return
found 1 day ago
Select JetBlue Airways flight, departing Mon, 26 Oct from Philadelphia to London, returning Wed, 4 Nov, priced at £649 found 1 day ago
Iberia
Mon, 9 Nov - Tue, 17 Nov
PHL
Philadelphia
LHR
London
£661 Return, found 4 days ago
£661
Return
found 4 days ago
Select Iberia flight, departing Mon, 9 Nov from Philadelphia to London, returning Tue, 17 Nov, priced at £661 found 4 days ago
KLM
Mon, 7 Sept - Wed, 23 Sept
PHL
Philadelphia
LHR
London
£668 Return, found 4 days ago
£668
Return
found 4 days ago
Select KLM flight, departing Mon, 7 Sept from Philadelphia to London, returning Wed, 23 Sept, priced at £668 found 4 days ago
Finnair
Mon, 7 Sept - Tue, 27 Oct
PHL
Philadelphia
LHR
London
£672 Return, found 2 days ago
£672
Return
found 2 days ago
Select Finnair flight, departing Mon, 7 Sept from Philadelphia to London, returning Tue, 27 Oct, priced at £672 found 2 days ago
Aer Lingus
Tue, 29 Sept - Thu, 8 Oct
PHL
Philadelphia
LHR
London
£673 Return, found 9 hours ago
£673
Return
found 9 hours ago
Select Aer Lingus flight, departing Tue, 29 Sept from Philadelphia to London, returning Thu, 8 Oct, priced at £673 found 9 hours ago
Air France
Mon, 7 Sept - Wed, 23 Sept
PHL
Philadelphia
LHR
London
£674 Return, found 4 days ago
£674
Return
found 4 days ago
Select Air France flight, departing Mon, 7 Sept from Philadelphia to London, returning Wed, 23 Sept, priced at £674 found 4 days ago
British Airways
Mon, 7 Sept - Wed, 23 Sept
PHL
Philadelphia
LHR
London
£680 Return, found 4 days ago
£680
Return
found 4 days ago
Select British Airways flight, departing Mon, 7 Sept from Philadelphia to London, returning Wed, 23 Sept, priced at £680 found 4 days ago

Alternative airports near London

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

Select flight to Heathrow LHR. Cheapest option available. Average driving time to city centre is 28 minutes. Flights from £742
LHR
Heathrow
Cheapest
Average driving time to city centre28 min
Flights from £742

Frequently asked questions

How much does a flight from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow) cost?
One-way flights typically cost between £377 and £1,994 and return flights often range between £735 and £3,147. 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 Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow)?
September is typically the cheapest month to fly from Philadelphia International Airport (PHL) to London Heathrow (LHR), with average return fares of approximately £479. This is about 22% lower than the average price throughout the year. September often sees lower prices as the peak summer travel season ends and demand decreases. Other cheap months to fly from Philadelphia International Airport (PHL) to London Heathrow (LHR) include August and October.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow)?
Enter PHL to LHR and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow)?
To find a cheap flight from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow), 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 airline to fly with from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow)?
The best airline to fly with from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow) will differ from traveller to traveller. If you like to fly early, BA offers early morning flights. If price is the most important factor, AA typically offers the lowest fares. AA offers the most daily flights from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow)?
When looking for the best time to fly from Philadelphia International Airport (PHL) to London Heathrow (LHR), you'll find that September and August are typically the cheapest months, with average return flights around £479. However, the most popular months for travel are December and March. Since there isn't an overlap between the cheapest and most popular months, you have a choice: if saving money is your top priority, aim for September or August. If you prefer to travel when there are plenty of flight options and a lively atmosphere, December and March might be better, though prices could be higher. This information is based on booking data from the past year.*Prices based on flights available on Expedia in the last year.
How many flights per day from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow)?
There are approximately 3 nonstop flights per day from Philadelphia International Airport (PHL) to London Heathrow (LHR). For even more choice, look at flights that include layovers, as there are around 146 connecting flights per day. Some common connection points include Logan International (BOS), Pearson International (YYZ), and O'Hare International (ORD).
What is the earliest flight from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow)?
The earliest flight from Philadelphia International Airport (PHL) to London Heathrow (LHR) typically departs at approximately 5:00 AM local time, operated by American Airlines. This is a seasonal service active in December. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow)?
You'll typically find the most flights from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow) on a Thursday, with around 82 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include American Airlines, Delta Air Lines, and United Airlines. Flight schedules are consistent throughout the week.
What are the most popular departure times for flights from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow)?
The most popular departure times for flights from Philadelphia International Airport (PHL) to London Heathrow (LHR) are in the evening, from 6pm to 9pm. About 40% of passengers prefer this time. Many major carriers, including American Airlines and British Airways, offer flights during this window. This timing works well because you can maximise your time in Philadelphia before your evening flight, and you'll arrive in London in the morning ready to explore.
How long does it take to fly from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow)?
Direct flights from PHL to LHR usually take about 7 hours 20 minutes, traveling roughly 3,536 miles. If you opt for a connecting flight, expect to add around 5 hours to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow)?
Select the "Business class" and "First class" filters when looking for PHL to LHR flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow) flight with Expedia?
It's easy to earn miles on a Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow) 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 London from Philadelphia Intl. (PHL)?
From Philadelphia Intl. (PHL), you can fly into London Intl. (YXU), London City (LCY), Heathrow (LHR) and Gatwick (LGW) in London. Some flights may connect through major hubs like Washington Dulles Intl. (IAD), O'Hare Intl. (ORD), Hartsfield-Jackson Atlanta Intl. (ATL) before reaching London. 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 Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow) at the last minute?
Typically, booking a last minute flight from Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow) 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 Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow) flight and hotel package?
Securing a Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow) 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 Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow)?
If you booked your Philadelphia, PA (PHL-Philadelphia Intl.) to London (LHR-Heathrow) 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
Philadelphia Intl.
Destination airport
Heathrow
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
£607
Distance
5656 km
Average flight time
12 hours 13 mins

Book with confidence

Compare flights from Philadelphia to London easily and book with confidence

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

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 Philadelphia Intl. (PHL) to Heathrow (LHR)

The easiest way to view the best deals on flights from Philadelphia to London 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 Philadelphia Intl. to Heathrow start at just £607 and range up to £680.  

To find an even better deal, try  

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

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

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Philadelphia Intl. to Heathrow 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 Philadelphia to London easily and book with confidence

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