Q: How much does it cost for a return flight from London Heathrow Airport to Philadelphia?

Airfare is below average for this route at the moment. London Heathrow Airport to Philadelphia flights typically cost between £514 and £668 in September. The cheapest return flight price found within the last 3 days was £477 on Air Canada (11 Sept-14 Sept).

Question 1

What’s the top stopover airport for flights from London Heathrow Airport to Philadelphia?

Accepted Answer

Dublin (DUB) – chosen by Cheapflights users on 42% of one-stop itineraries from London Heathrow Airport to Philadelphia on Cheapflights.

Question 2

How much does it cost for a return flight from London Heathrow Airport to Philadelphia?

Accepted Answer

Airfare is below average for this route at the moment.London Heathrow Airport to Philadelphia flights typically cost between £514 and £668 in September.
The cheapest return flight price found within the last 3 days was £477 on Air Canada (11 Sept-14 Sept).

Question 3

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Philadelphia?

Accepted Answer

Flights via Atlanta (ATL) offer the fastest connection on this route, with an average stopover time of 1h 37m.

Question 4

What’s the cheapest stopover airport for flights from London Heathrow Airport to Philadelphia?

Accepted Answer

Washington, D.C. (IAD) is the most affordable one-stop option, with an average return flight price of £530.

Question 5

What’s the fastest stopover option from London Heathrow Airport to Philadelphia?

Accepted Answer

Flights via Washington, D.C. (IAD) have the shortest average one-way travel time for one-stop routes: 11h 41m.

Question 6

How long is the flight from London Heathrow Airport to Philadelphia?

Accepted Answer

Airlines like Air Canada and United Airlines fly from London Heathrow Airport to Philadelphia in about 12h 48m. The time it takes to get you to your destination can typically vary by up to 2h 39m. The distance between London Heathrow Airport and Philadelphia is about 3533 mi. This flight may include one or multiple stops.

Question 7

What are the cheapest airlines flying from London Heathrow Airport to Philadelphia round-trip?

Accepted Answer

Our cheapest airline available from London Heathrow Airport to Philadelphia is United Airlines. Our recent data shows that you can find tickets from as low as £301 on this airline. Additional options worth looking into are Icelandair and Air Canada, starting at £334 and £336 round-trip. United Airlines is currently priced 45% below the average price you’ll pay for this route.

Question 8

How far ahead should I book a flight from London Heathrow Airport to Philadelphia?

Accepted Answer

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Philadelphia, you should look to book at least 79 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Question 9

What is the cheapest month to book a flight from London Heathrow Airport to Philadelphia?

Accepted Answer

Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £648). Flying from London Heathrow Airport to Philadelphia in July is currently the most expensive (average of £839). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 10

What is the cheapest day to fly from London Heathrow Airport to Philadelphia?

Accepted Answer

Travellers seeking maximum savings on their London Heathrow Airport to Philadelphia flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

Question 11

Weekly flight availability from London Heathrow Airport to Philadelphia

Accepted Answer

The most flights from LHR to PHL are scheduled on a Monday (15 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (15 on average).

Question 12

E

Accepted Answer

In terms of precipitation, rainfall in Philadelphia ranges from 69.0 - 112.0 inches per month. July is typically the wettest month, when rainfall can reach 112.0 mm. February is typically the driest time to visit Philadelphia when rainfall is around 69.0 mm.

Question 13

E

Accepted Answer

If weather is an important factor for your trip to Philadelphia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 26.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 1.0 C).

Question 14

What are the cheapest flights from London Heathrow Airport to Philadelphia?

Accepted Answer

The cheapest flight price from London Heathrow Airport to Philadelphia is £468. On average you can expect to pay £769. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £384.

Question 15

What are the most reliable airlines from London Heathrow Airport to Philadelphia?

Accepted Answer

Consider Aer Lingus (69%), American Airlines (65%) or Finnair (65%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Philadelphia.

Question 16

What are the most popular airlines that fly from London Heathrow Airport to Philadelphia?

Accepted Answer

Consider American Airlines, Air Canada or Finnair when booking your flight. These represent the most popular airlines when flying from London Heathrow Airport to Philadelphia.

Question 17

What is the cheapest day to fly round-trip from London Heathrow Airport to Philadelphia?

Accepted Answer

It’s generally more expensive to depart on a Monday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

Question 18

How far in advance should I book a flight from London Heathrow Airport to Philadelphia?

Accepted Answer

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 17 days in advance, which can save you up to 48% on flights from London Heathrow Airport to Philadelphia compared to booking the week you need them. Waiting 17 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £482. For sooner than that we have options available in the next 3 days from £772.

Question 19

What is the cheapest month to fly from London Heathrow Airport to Philadelphia?

Accepted Answer

The best pricing can be found in the month of February. Prices to Philadelphia from London Heathrow Airport average £549. You can even find prices in February for less than £549, as users have found deals to Philadelphia from as low as £388. The month of August appears to be one of the more expensive times to travel to Philadelphia from London Heathrow Airport. Flying in the targeted month can save you up to 23%.

Question 20

What is the cheapest time of day to fly from LHR to PHL?

Accepted Answer

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Philadelphia in the afternoon. If you’re flexible enough to do this you can expect to save up to 21% on your trip compared to booking a flight at midday.

Question 21

What airport do you fly into for flights to Philadelphia from London Heathrow?

Accepted Answer

Most people fly into Philadelphia (PHL) if they book a flight to Philadelphia from London Heathrow. On average, Philadelphia has 15 inbound flights from London Heathrow per day from 11 airlines. Philadelphia is conveniently located just 7.0 mi from Philadelphia’s city center.

Question 22

Can I find deals for flights from Heathrow to Philadelphia that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Heathrow to Philadelphia flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 23

How can I find direct flights from Heathrow to Philadelphia?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Philadelphia.

Question 24

Can I find deals for business class flights from Heathrow to Philadelphia?

Accepted Answer

Yes. Cheapflights offers flight deals from Heathrow to Philadelphia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 25

How does Cheapflights help users find flights from Heathrow to Philadelphia?

Accepted Answer

When you search for this flight from Heathrow to Philadelphia, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Question 26

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Philadelphia?

Accepted Answer

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Philadelphia for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Question 27

Can Cheapflights find flights from Heathrow to Philadelphia with no change fees?

Accepted Answer

Need flexible booking options for your flight to Philadelphia from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Question 28

Can Cheapflights notify me if prices for flights from Heathrow to Philadelphia become cheaper?

Accepted Answer

Yes! Start tracking prices for Heathrow to Philadelphia flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

Round-trip from	£477
One-way from	£406
Popular in	July
Cheapest in	March
Average price	£673
Good round-trip deal	£519 or less
Good one-way deal	£549 or less

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest£301	Average£435	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Icelandair	Cheapest£334	Average£484	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Air Canada	Cheapest£336	Average£472	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
JetBlue	Cheapest£356	Average£517	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Lufthansa	Cheapest£410	Average£515	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£432	Average£544	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Finnair	Cheapest£441	Average£556	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
American Airlines	Cheapest£444	Average£585	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Aer Lingus	Cheapest£446	Average£618	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Iberia	Cheapest£467	Average£570	FlexibilityNo cancel fee	On-time77%	Search Iberia flights

Cheap flights from London Heathrow Airport to Philadelphia from £406

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London Heathrow to Philadelphia are usually found in March or September, booked 79 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

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Find flight deals from Heathrow to Philadelphia

Cheapest flights from Heathrow to PhiladelphiaExplore the most affordable flight options available from Heathrow to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 August 2025.

Explore the most affordable flight options available from Heathrow to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 August 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Philadelphia that are best for you.

Best time to book a flight from Heathrow to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Heathrow with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Philadelphia

How far ahead should I book a flight from London Heathrow Airport to Philadelphia?

What is the cheapest month to book a flight from London Heathrow Airport to Philadelphia?

What is the cheapest time of day to fly from LHR to PHL?

What is the cheapest day to fly from London Heathrow Airport to Philadelphia?

How much does it cost for a return flight from London Heathrow Airport to Philadelphia?

Weekly flight availability from London Heathrow Airport to Philadelphia

What’s the top stopover airport for flights from London Heathrow Airport to Philadelphia?

What’s the fastest stopover option from London Heathrow Airport to Philadelphia?

What’s the fastest stopover option from London Heathrow Airport to Philadelphia?

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Philadelphia?

Reviews of airlines servicing Philadelphia

Get a feel of what it's like to fly with Finnair, United Airlines, andAer Lingus from London Heathrow Airport to Philadelphia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Philadelphia from London Heathrow?

How long is the flight from London Heathrow Airport to Philadelphia?

What are the cheapest airlines flying from London Heathrow Airport to Philadelphia round-trip?

What are the most reliable airlines from London Heathrow Airport to Philadelphia?

What are the cheapest flights from London Heathrow Airport to Philadelphia?

Can I find deals for flights from Heathrow to Philadelphia that include hotel bookings?

How can I find direct flights from Heathrow to Philadelphia?

Can I find deals for business class flights from Heathrow to Philadelphia?

What is the cheapest month to book a flight from London Heathrow Airport to Philadelphia?

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Fly from Heathrow to Philadelphia on these airlines

Choose from the following airlines for your flight from Heathrow to Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on 26 August 2025.

Top 10 airlines flying from Heathrow to Philadelphia

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How does Cheapflights help users find flights from Heathrow to Philadelphia?

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Can Cheapflights find flights from Heathrow to Philadelphia with no change fees?

Can Cheapflights notify me if prices for flights from Heathrow to Philadelphia become cheaper?

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Cheapest flights from Heathrow to Philadelphia
Explore the most affordable flight options available from Heathrow to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 August 2025.