Price observed over the last 3 months for a round trip.
Compare all flight tickets and find cheap flights from London to Philadelphia
Today’s flight suggestion for London - Philadelphia
Outbound 14 December 2026 · Inbound 23 December 2026
Today’s suggestion
17:15
LHR 20:06 +1
PHL31h 51m
1 stop
17:31
PHL 12:00 +1
LHR13h 29m
1 stop
From £664
17:15
LHR 07:59 +1
PHL19h 44m
1 stop
18:51
PHL 12:00 +1
LHR12h 9m
1 stop
From £664
13:10
LHR 16:15
PHL8h 5m
Direct
16:05
PHL 09:20 +1
LHR12h 15m
1 stop
From £712
Cheapest flight
£544
Average price of a round trip
£631
Average price recorded over the last 3 months for a round trip.
Flight duration
19h56
A flight from London to Philadelphia takes on average 19h56.
Best time
November
According to user searches, the ideal month to go to Philadelphia is November.
What is the cheapest month for this flight?
Monthly price data (Table View)
November
Nov
£0
December
Dec
£644
January
Jan
£0
February
Feb
£519
March
Mar
£0
April
Apr
£0
May
May
£495
June
Jun
£0
July
Jul
£612
August
Aug
£968
September
Sept
£535
October
Oct
£564
* The prices shown are an average per month of the prices found by Liligo users during the last 30 days.
Tips for finding cheap flights from London to Philadelphia
Check out our tips for booking your flight to Philadelphia (USA) from London (United Kingdom) at the cheapest possible price.
Usually, the cheapest month to pick up a ticket on this route is November, with an average ticket price of £482 (calculation over the last two years). The most touristic season corresponds to the months of August, November and November.
For an attractive price, it is advisable to buy your flight tickets at least 40 days before the departure date.
The airline offering the cheapest tickets is Ryanair. A ticket from the company Ryanair to Philadelphia costs on average £571.
The airlines that offer the most flights are .
Price of flight tickets from London to Philadelphia
Here is some information and tips to know before booking your flight:
- Flight ticket prices range from £544 to £665
- The average price of a flight ticket is about £631
- Prices are lowest for stays in the month of November
- The month in which booking a ticket is cheaper is: November
info departure city :
London, United Kingdom
airports :
London City Airport (LCY)
London Gatwick Airport (LGW)
London Heathrow Airport (LHR)
London Luton Airport (LTN)
London-Stansted Airport (STN)
local time :
London is a city in the country United Kingdom, the time zone is [[timezone]]. In London, it is currently {fromLocalTime}, the temperature is on average 8°C, with a minimum of 8°C and a maximum of 9°C.
The city of London (LON) has 5 airport(s): London City, London Gatwick, London Heathrow, London Luton and London-Stansted
destination info :
Philadelphia, USA
airports :
Philadelphia International Airport (PHL)
Northeast Philadelphia Airport (PNE)
local time :
Philadelphia is in the country USA, the time zone is [[timezone]]. In Philadelphia, it is currently {toLocalTime}, the temperature is on average 12°C, with a minimum of 7°C and a maximum of 17°C.
The city of Philadelphia (PHL) has 2 airport(s): Philadelphia International and Northeast Philadelphia
Useful info about Philadelphia
What is the least touristic period to go to Philadelphia?
If you want to visit Philadelphia during the least touristic period, choose the month of November.
What is the most popular time to travel to Philadelphia?
In Philadelphia, the most touristic month is August. It is during this period that the prices offered by airlines are also the highest.
When should I book my flight London - Philadelphia?
According to our data, it is recommended to book your flight 40 days before your departure. If you book your flight ticket 6 weeks before your departure, you may find a price below average. The cheapest day to book a flight London - Philadelphia is Friday.
What are the arrival and destination airports when travelling between London and Philadelphia?
When you leave, you can leave from London Gatwick, London Heathrow, London Luton or London-Stansted, and you will arrive at Philadelphia International.
How to reach London airport from the city centre?
The airport London City is located 16 km, London Gatwick is located 38 km, London Heathrow is located 35 km, London Luton is located 45 km or London-Stansted is located 49 km from the city centre. You can access it by using public transport, taking a taxi, or renting a car..
Are there other means of transport to go from London to Philadelphia?
Flights are the only means of transport listed on Liligo for this journey.
Are there big differences in weather between London and Philadelphia?
In summer, the average temperature is 24°C in Philadelphia and 18°C in London. The average rainfall in summer is 129 mm in Philadelphia and 63 mm in London.In summer, it is warmer in Philadelphia and it rains less in London. In winter, it is colder in London and it rains more in Philadelphia.
