Question 1

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

Accepted Answer

Dublin (DUB) – chosen by Cheapflights users on 45% of one-stop itineraries from London Heathrow Airport to Philadelphia on Cheapflights.

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 £545.

Question 5

How often are flights from London to Philadelphia delayed?

Accepted Answer

About 17% of weekly flights between London and Philadelphia have experienced delays in the past year, with the average delay time being 179 minutes.

Question 6

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 52m.

Question 7

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 8

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 16m.

Question 9

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

Accepted Answer

Airlines like United Airlines, JetBlue, and British Airways fly from London Heathrow Airport to Philadelphia in about 12h 25m. The time it takes to get you to your destination can typically vary by up to 8h 43m. The distance between London Heathrow Airport and Philadelphia is about 3533 mi. This flight may include one or multiple stops.

Question 10

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 £306 on this airline. Additional options worth looking into are Air Canada and Lufthansa, starting at £342 and £418 round-trip. United Airlines is currently priced 47% below the average price you’ll pay for this route.

Question 11

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

Accepted Answer

The cheapest airline one-way is JetBlue, with whom users have recently found tickets for as low as £329. However, be on the lookout for offers from British Airways and Iberia, as they are both options that can get you from London Heathrow Airport to Philadelphia for a low price.

Question 12

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 11 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 13

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

Accepted Answer

Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £314). Flying from London Heathrow Airport to Philadelphia in June is currently the most expensive (average of £345). 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 14

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 15

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 16

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 17

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

Accepted Answer

The cheapest flight price from London Heathrow Airport to Philadelphia is £330. On average you can expect to pay £964. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £469.

Question 18

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

Accepted Answer

Consider Malaysia Airlines (80%), American Airlines (76%) or Finnair (76%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Philadelphia.

Question 19

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 20

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 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 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 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	£469
One-way from	£323
Popular in	July
Cheapest in	September
Average price	£564
Good round-trip deal	£559 or less
Good one-way deal	£446 or less

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest£306	Average£425	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Air Canada	Cheapest£342	Average£475	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Lufthansa	Cheapest£418	Average£521	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
JetBlue	Cheapest£425	Average£612	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
British Airways	Cheapest£460	Average£578	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£461	Average£599	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Finnair	Cheapest£466	Average£582	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Aer Lingus	Cheapest£470	Average£673	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Iberia	Cheapest£490	Average£576	FlexibilityNo cancel fee	On-time77%	Search Iberia flights

Cheap flights from London Heathrow Airport to Philadelphia from £323

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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap 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 15 March 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 15 March 2026.

Best flights from Heathrow to PhiladelphiaDiscover carefully curated flight deals from Heathrow to Philadelphia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 15 March 2026.

Discover carefully curated flight deals from Heathrow to Philadelphia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 15 March 2026.

Direct flights from Heathrow to PhiladelphiaExplore direct flight options from Heathrow to Philadelphia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 15 March 2026.

Explore direct flight options from Heathrow to Philadelphia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 15 March 2026.

Last-minute flights from Heathrow to PhiladelphiaDiscover last-minute flight deals from Heathrow to Philadelphia. Data last updated 15 March 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Philadelphia. Data last updated 15 March 2026 and is based on user searches.

One-way flights from Heathrow to PhiladelphiaSearch for one-way flight options from Heathrow to Philadelphia. Find affordable one-way fares based on user searches. Data last updated 15 March 2026.

Search for one-way flight options from Heathrow to Philadelphia. Find affordable one-way fares based on user searches. Data last updated 15 March 2026.

Find flight deals from Heathrow to Philadelphia

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Cheapflights Fare Finder

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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?

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?

Browse thousands of different options on Cheapflights for your next trip

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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 15 March 2026.

Alternative routes for Heathrow to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Philadelphia by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to Pennsylvania

Book a non-stop flight to one of these other cities located in Pennsylvania.

Search flights from Heathrow to Philadelphia by cabin class

Find flights from Heathrow to Philadelphia, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Heathrow and Philadelphia flights

Browse other Heathrow and Philadelphia flight options. Last updated on 15 March 2026.

Other flights from Heathrow

Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 15 March 2026.

Other flights to Philadelphia

Explore flights to Philadelphia departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 15 March 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Top 9 airlines flying from Heathrow to Philadelphia

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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?

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 15 March 2026.

Best flights from Heathrow to Philadelphia
Discover carefully curated flight deals from Heathrow to Philadelphia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 15 March 2026.

Direct flights from Heathrow to Philadelphia
Explore direct flight options from Heathrow to Philadelphia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 15 March 2026.

Last-minute flights from Heathrow to Philadelphia
Discover last-minute flight deals from Heathrow to Philadelphia. Data last updated 15 March 2026 and is based on user searches.

One-way flights from Heathrow to Philadelphia
Search for one-way flight options from Heathrow to Philadelphia. Find affordable one-way fares based on user searches. Data last updated 15 March 2026.