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 £496 and £749 in January. The cheapest return flight price found within the last 3 days was £450 on United Airlines (26 Jan-2 Feb).

Question 1

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

Accepted Answer

Flights via Montreal (YUL) have the shortest average one-way travel time for one-stop routes: 11h 06m.

Question 2

Which airline has the best punctuality record on London to Philadelphia flights?

Accepted Answer

Over the past year, British Airways have had the lowest number of delays on this route, with just 16% of flights being delayed.

Question 3

What day of the week experiences the fewest flight delays on this route?

Accepted Answer

Wednesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Question 4

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

Accepted Answer

Dublin (DUB) – chosen by Cheapflights users on 44% of one-stop itineraries from London Heathrow Airport to Philadelphia on Cheapflights.

Question 5

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 6

How often are flights from London to Philadelphia delayed?

Accepted Answer

About 18% of weekly flights between London and Philadelphia have experienced delays in the past year, with the average delay time being 175 minutes.

Question 7

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

Accepted Answer

Flights via Washington, D.C. (IAD) offer the fastest connection on this route, with an average stopover time of 1h 56m.

Question 8

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 £496 and £749 in January.
The cheapest return flight price found within the last 3 days was £450 on United Airlines (26 Jan-2 Feb).

Question 9

What is the most punctual flight time for London to Philadelphia flights?

Accepted Answer

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

Question 10

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

Accepted Answer

Airlines like Delta fly from London Heathrow Airport to Philadelphia in about 15h 20m. The time it takes to get you to your destination can typically vary by up to . The distance between London Heathrow Airport and Philadelphia is about 3533 mi.

Question 11

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 £302 on this airline. Additional options worth looking into are Air Canada and Lufthansa, starting at £338 and £402 round-trip. United Airlines is currently priced 46% below the average price you’ll pay for this route.

Question 12

What are the cheapest airlines to fly from London Heathrow Airport to Philadelphia one-way?

Accepted Answer

The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as £358. However, be on the lookout for offers from Aer Lingus and Iberia, as they are both options that can get you from London Heathrow Airport to Philadelphia for a low price.

Question 13

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 25 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 14

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

Accepted Answer

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £309). Flying from London Heathrow Airport to Philadelphia in June is currently the most expensive (average of £341). 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 15

Weekly flight availability from London Heathrow Airport to Philadelphia

Accepted Answer

The most flights from LHR to PHL are scheduled on a Monday (10 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (10 on average).

Question 16

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 17

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 18

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

Accepted Answer

The cheapest flight price from London Heathrow Airport to Philadelphia is £385. On average you can expect to pay £877. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £345.

Question 19

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

Accepted Answer

Consider Aer Lingus (80%), American Airlines (79%) or Finnair (79%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Philadelphia.

Question 20

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

Accepted Answer

Consider British Airways, Finnair or Aer Lingus when booking your flight. These represent the most popular airlines when flying from London Heathrow Airport to Philadelphia.

Question 21

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

Accepted Answer

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Philadelphia as you normally would.

Question 22

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 10 inbound flights from London Heathrow per day from 9 airlines. Philadelphia is conveniently located just 7.0 mi from Philadelphia’s city center.

Question 23

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 24

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 25

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 26

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 27

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 28

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 29

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	£450
One-way from	£230
Popular in	August
Cheapest in	February
Average price	£579
Good round-trip deal	£523 or less
Good one-way deal	£407 or less

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest£302	Average£418	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Air Canada	Cheapest£338	Average£470	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Lufthansa	Cheapest£402	Average£501	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
JetBlue	Cheapest£419	Average£601	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
British Airways	Cheapest£437	Average£551	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Finnair	Cheapest£443	Average£556	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
American Airlines	Cheapest£452	Average£596	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Iberia	Cheapest£454	Average£553	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Aer Lingus	Cheapest£464	Average£675	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

Cheap flights from London Heathrow Airport to Philadelphia from £230

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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Philadelphia

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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 16 January 2026.

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 16 January 2026.

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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?

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

Weekly flight availability from London Heathrow Airport to Philadelphia

How often are flights from London to Philadelphia delayed?

What is the most punctual flight time for London to Philadelphia flights?

What day of the week experiences the fewest flight delays on this route?

Which airline has the best punctuality record on London to Philadelphia flights?

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

What’s the cheapest stopover airport for flights 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 cheapest airlines to fly from London Heathrow Airport to Philadelphia one-way?

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 16 January 2026.

Top 9 airlines flying from Heathrow to Philadelphia

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

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

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 16 January 2026.