Our cheapest offers for flights from London to Philadelphia

Here you can compare cheap flights from London (LON) to Philadelphia (PHL) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Philadelphia. Prices and availability may change at any time.

	Outbound	Return	Airlines	Baggage	Price
London Philadelphia	Outbound 31/03/26 1 Stopover (DUB) EI0151, AY3803 12h 25min	Return 21/04/26 1 Stopover (YYZ) AA5116, AA6921 13h 40min	Aer Lingus Irish Airlines, Finnair		£512
Best option London Philadelphia	Outbound 31/03/26 direct IB4673 08h 00min	Return 21/04/26 direct IB4672 07h 15min	Iberia	?	£542
London Philadelphia Please note: transfer for connecting flight	Outbound 31/03/26 1 Stopover (DUB) FR1112, EI0115 12h 00min	Return 21/04/26 1 Stopover (DUB) EI0114, FR0118 13h 45min	Ryanair, Aer Lingus Irish Airlines		£731
London Philadelphia	Outbound 31/03/26 1 Stopover (DUB) BA5953, BA1580 11h 15min	Return 21/04/26 direct BA1587 07h 25min	British Airways		£537
London Philadelphia	Outbound 31/03/26 1 Stopover (DUB) BA5953, BA1580 11h 15min	Return 21/04/26 direct BA1587 07h 25min	British Airways		£538
London Philadelphia	Outbound 31/03/26 1 Stopover (DUB) EI0151, AY3803 12h 25min	Return 21/04/26 1 Stopover (CLT) BA2380, BA1599 14h 15min	Aer Lingus Irish Airlines, Finnair		£558
London Philadelphia	Outbound 31/03/26 direct BA1538 08h 00min	Return 21/04/26 direct BA1587 07h 25min	British Airways		£559
London Philadelphia	Outbound 25/05/26 1 Stopover (BOS) B61926, B61159 25h 53min	Return 07/06/26 1 Stopover (BOS) B60560, B62104 32h 10min	JetBlue Airways		£566
London Philadelphia	Outbound 31/03/26 1 Stopover (DUB) BA4460, BA1580 13h 20min	Return 21/04/26 1 Stopover (DUB) BA1579, BA4465 13h 15min	British Airways		£567
London Philadelphia	Outbound 31/03/26 1 Stopover (DUB) BA4460, BA1580 13h 20min	Return 21/04/26 1 Stopover (DUB) BA1579, BA4465 13h 15min	British Airways		£568

Tips and tricks to help you find cheap flights from London to Philadelphia

Important flight information

Flight information: London - Philadelphia

Outbound and return from	£512.00
Flight duration	min. 08:10 / max. 08:45
Return flight duration	min. 07:00/ max. 07:25
Distance	5715 km
Flights per week	23
Departure airport	Airport London (LCY, LGW, LHR, LTN, STN, SEN) (LON)
Arrival airport	Airport Philadelphia International Airport, PA (PHL)
Destination country	Flights to United States

Alternative routes to United States

Flight London - New York from £283
Flight London - Los Angeles from £379
Flight London - San Francisco from £385
Flight London - Miami from £294
Flight London - Orlando from £371
Flight London - Chicago from £366
Flight London - Las Vegas from £419
Flight London - Boston from £307
Flight London - Honolulu from £659
Flight London - Seattle-Tacoma from £376

Alternative flights to Philadelphia

Flight London Heathrow - Philadelphia from £512
Flight London Gatwick - Philadelphia from £566
Flight London City - Philadelphia from £567

Flights from London to Philadelphia

Our cheapest offers for flights from London to Philadelphia

London (LCY, LGW, LHR, LTN, STN, SEN)

Philadelphia International Airport, PA

Tips and tricks to help you find cheap flights from London to Philadelphia

Important flight information

Flight information: London - Philadelphia

Alternative routes to United States

Alternative flights to Philadelphia

Flight destinations with a similar price