Question 1

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 Finnair. Our recent data shows that you can find tickets from as low as £450 on this airline. Additional options worth looking into are British Airways and American Airlines, starting at £453 and £457 round-trip. Finnair is currently priced 19% below the average price you’ll pay for this route.

Question 2

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

Accepted Answer

The cheapest airline one-way is Aer Lingus, with whom users have recently found tickets for as low as £386. 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 3

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 4

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 5

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 mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Question 6

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 Friday, which is when the least amount of flights are scheduled (10 on average).

Question 7

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 8

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 9

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

Accepted Answer

The cheapest flight price from London Heathrow Airport to Philadelphia is £390. On average you can expect to pay £2,528. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £386.

Question 10

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

Accepted Answer

Consider Aer Lingus (89%), American Airlines (81%) or Finnair (81%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Philadelphia.

Question 11

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 12

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 13

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 42% 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 £514. For sooner than that we have options available in the next 3 days from £758.

Question 14

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 £555. You can even find prices in February for less than £555, as users have found deals to Philadelphia from as low as £386. 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 29%.

Question 15

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 23% on your trip compared to booking a flight in the morning.

Question 16

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 14 inbound flights from London Heathrow per day from 11 airlines. Philadelphia is conveniently located just 7.0 mi from Philadelphia’s city center.

Question 17

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 18

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 19

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 20

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 21

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 22

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 23

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	£386
Popular in	July
Cheapest in	March
Average price	£544
Good round-trip deal	£490 or less
Good one-way deal	£471 or less

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest£298	Average£338	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Icelandair	Cheapest£331	Average£467	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Air Canada	Cheapest£333	Average£470	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
JetBlue	Cheapest£350	Average£474	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Lufthansa	Cheapest£407	Average£494	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£427	Average£544	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Finnair	Cheapest£439	Average£567	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
American Airlines	Cheapest£448	Average£589	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Virgin Atlantic	Cheapest£458	Average£708	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Aer Lingus	Cheapest£459	Average£625	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

Cheap flights from London Heathrow Airport to Philadelphia from £386

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 24/9. 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 February, booked 79 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

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 13 June 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 13 June 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?

Use this chart to determine the optimal time to book a return flight from Heathrow to Philadelphia. Price data was last updated on 9 June 2025.

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?

Find hourly flight availability from Heathrow to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 June 2025.

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

Use this chart to determine the cheapest time to fly return from Heathrow to Philadelphia. Price data was last updated on 8 June 2025.

Weekly flight availability from London Heathrow Airport to Philadelphia

Explore weekly flight availability from Heathrow to Philadelphia. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 13 June 2025.

Rainfall in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average rainfall totals by month.

Temperature in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average temperature totals by month.

Reviews of airlines servicing Philadelphia

Read reviews from past customers who have flown Delta, KLM and Austrian Airlines from London to Philadelphia. Reviews also offer insight into each airline's 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?

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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 13 June 2025.

Top 10 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 13 June 2025.