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

Airfare is typical for this route at the moment. London to Philadelphia flights typically cost between £457 and £565 in September. The cheapest return flight price found within the last 3 days was £475 on Multiple Airlines (8 Sept-15 Sept).

Question 1

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

Accepted Answer

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

Question 2

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

Accepted Answer

Dublin (DUB) – chosen by Cheapflights users on 39% of one-stop itineraries from London to Philadelphia on Cheapflights.

Question 3

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

Accepted Answer

Airfare is typical for this route at the moment.London to Philadelphia flights typically cost between £457 and £565 in September.
The cheapest return flight price found within the last 3 days was £475 on Multiple Airlines (8 Sept-15 Sept).

Question 4

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

Accepted Answer

Flights via Washington, D.C. (IAD) have the shortest average one-way travel time for one-stop routes: 11h 36m.

Question 5

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

Accepted Answer

Detroit (DTW) is the most affordable one-stop option, with an average return flight price of £466.

Question 6

How long is the flight from London to Philadelphia?

Accepted Answer

There are many flights that can get you from London to Philadelphia in 11h 30m. Fly via Air Canada, United Airlines, or Virgin Atlantic to get the fastest option. London and Philadelphia are separated by a distance of 3533 mi. This flight may include one or multiple stops.

Question 7

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

Accepted Answer

Cheapflights users have booked flights from London to Philadelphia round-trip from £302. Other airlines that can offer you cheap pricing are Icelandair, from £334, and Air Canada, from £336. You may be able to fly from London to Philadelphia for 45% less than the average price by searching for these airlines.

Question 8

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

Accepted Answer

£407 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on JetBlue and Lufthansa, with prices starting from £408 and £503, respectively.

Question 9

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

Accepted Answer

The price you pay for your flight from London to Philadelphia may vary depending on when you book. For the best chance of a lower fare, look to book 16 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Question 10

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

Accepted Answer

Currently, March is the cheapest month in which you can book a flight from London to Philadelphia (average of £648). Flying from London 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 11

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

Accepted Answer

Travellers seeking maximum savings on their London to Philadelphia flight should consider departing on Thursday 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 12

Weekly flight availability from London to Philadelphia

Accepted Answer

The most flights from LON 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 13

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 14

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 15

What are the most popular routes from London to Philadelphia?

Accepted Answer

When deciding which route to take from London to Philadelphia consider London Heathrow - Philadelphia, London Gatwick - Philadelphia or London City - Philadelphia as they are the most popular.

Question 16

What are the cheapest flights from London to Philadelphia?

Accepted Answer

Looking at all options, your cheapest flight can be booked for £468. While the most popular route (London Heathrow - Philadelphia) can be booked for £368 on average our data indicates £771 when flying from London to Philadelphia.

Question 17

What are the most reliable airlines from London 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 to Philadelphia.

Question 18

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

Accepted Answer

Before booking your flight from London to Philadelphia check out the most popular airlines for this route: American Airlines, Air Canada or Finnair.

Question 19

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

Accepted Answer

Leaving on a Monday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 9% on the overall cost on flights from London to Philadelphia.

Question 20

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

Accepted Answer

Travelers have found it’s best to book a flight 17 days in advance to save up to 48% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 17 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from London to Philadelphia 1-2 weeks in advance for as low as £483, or £773 for flights within the next 24 hours.

Question 21

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

Accepted Answer

February is one of the best times of the year to fly to Philadelphia from London. Prices for February average £550 per person but you can even find prices for as low as £389. The most expensive prices can be found in the month of August. Opting for a February flight can save you 23% on your journey compared to booking in August

Question 22

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

Accepted Answer

It’s optimal to fly from London to Philadelphia in the afternoon. By choosing this option you can save up to 21% on the cost of your flight, compared to a flight at midday.

Question 23

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

Accepted Answer

If you book a flight to Philadelphia from London, you will be flying to Philadelphia, which is the city’s only airport. Philadelphia (PHL) is located 7.0 mi from the center of Philadelphia. There are 14 flights from London to Philadelphia per day from 11 different airlines.

Question 24

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

Accepted Answer

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

Question 25

How can I find direct flights from London 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 London to Philadelphia.

Question 26

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

Accepted Answer

Yes. Cheapflights offers flight deals from London 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 27

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

Accepted Answer

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Philadelphia from London today with Cheapflights!

Question 28

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

Accepted Answer

Cheapflights helps you find that perfect flight to Philadelphia from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Question 29

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

Accepted Answer

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to Philadelphia flexibly with Cheapflights today.

Question 30

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

Accepted Answer

Of course! You can now track prices for flights from London to Philadelphia and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

Round-trip from	£475
One-way from	£407
Popular in	August
Cheapest in	February
Average price	£679
Good round-trip deal	£520 or less
Good one-way deal	£550 or less

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest£302	Average£435	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Icelandair	Cheapest£334	Average£485	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Air Canada	Cheapest£336	Average£473	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
JetBlue	Cheapest£357	Average£518	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Lufthansa	Cheapest£410	Average£516	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£432	Average£576	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Finnair	Cheapest£442	Average£557	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
American Airlines	Cheapest£444	Average£586	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Aer Lingus	Cheapest£447	Average£620	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Iberia	Cheapest£467	Average£571	FlexibilityNo cancel fee	On-time77%	Search Iberia flights

Cheap flights from London to Philadelphia from £407

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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London to Philadelphia are usually found in February or September, booked 16 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from London to Philadelphia

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Find flight deals from London to Philadelphia

Cheapest flights from London to PhiladelphiaExplore the most affordable flight options available from London to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 August 2025.

Explore the most affordable flight options available from London to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 August 2025.

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

Best time to book a flight from London to Philadelphia

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

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a return flight from London to Philadelphia. Price data was last updated on 22 August 2025.

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

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

Find hourly flight availability from London 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 28 August 2025.

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

Use this chart to determine the cheapest time to fly return from London to Philadelphia. Price data was last updated on 16 December 2024.

Weekly flight availability from London to Philadelphia

Explore weekly flight availability from London 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 28 August 2025.

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

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

Share of one-stop return flights from London to Philadelphia chosen by Cheapflights users in the past 12 months, using the same stopover each way.

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

Average return fare for one-stop flights from London to Philadelphia, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

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

Shortest average travel time for one-stop one-way flights from London to Philadelphia, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

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

Average stopover duration for one-stop one-way flights from London to Philadelphia, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing Philadelphia

See what other customers who have flown with Finnair, United Airlines, andAer Lingus from London to Philadelphia have to say. You can also see how each airline compares 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 London 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?

How long is the flight from London to Philadelphia?

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

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

What are the most popular routes from London to Philadelphia?

What are the most reliable airlines from London to Philadelphia?

What are the cheapest flights from London to Philadelphia?

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

How can I find direct flights from London to Philadelphia?

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

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

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Fly from London to Philadelphia on these airlines

Choose from the following airlines for your flight from London to Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on 28 August 2025.

Top 10 airlines flying from London to Philadelphia

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

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

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

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

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Cheapest flights from London to Philadelphia
Explore the most affordable flight options available from London to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 August 2025.