Cheap Flights from London (LON) to Philadelphia (PHL)

View AU$1,061 flight on Tue, 17 Feb. 2026Opens in a new window

Popular airlines from London to Philadelphia, PA (PHL-Philadelphia Intl.)

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Cheap Flights from London (LON) to Philadelphia (PHL)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, 18 Sep. - Wed, 24 Sep.
LHR
London
PHL
Philadelphia
AU$1,002 Return, found 6 days ago
AU$1,002
Return
found 6 days ago
Select United flight, departing Thu, 18 Sep. from London to Philadelphia, returning Wed, 24 Sep., priced at AU$1,002 found 6 days ago
United
Tue, 17 Feb. - Wed, 25 Feb.
LHR
London
PHL
Philadelphia
AU$1,004 Return, found 5 days ago
AU$1,004
Return
found 5 days ago
Select United flight, departing Tue, 17 Feb. from London to Philadelphia, returning Wed, 25 Feb., priced at AU$1,004 found 5 days ago
United
Thu, 13 Nov. - Mon, 17 Nov.
LHR
London
PHL
Philadelphia
AU$1,006 Return, found 1 day ago
AU$1,006
Return
found 1 day ago
Select United flight, departing Thu, 13 Nov. from London to Philadelphia, returning Mon, 17 Nov., priced at AU$1,006 found 1 day ago
United
Thu, 18 Sep. - Wed, 24 Sep.
LHR
London
PHL
Philadelphia
AU$1,010 Return, found 6 days ago
AU$1,010
Return
found 6 days ago
Select United flight, departing Thu, 18 Sep. from London to Philadelphia, returning Wed, 24 Sep., priced at AU$1,010 found 6 days ago
Air Canada
Tue, 17 Feb. - Wed, 25 Feb.
LHR
London
PHL
Philadelphia
AU$1,012 Return, found 5 days ago
AU$1,012
Return
found 5 days ago
Select Air Canada flight, departing Tue, 17 Feb. from London to Philadelphia, returning Wed, 25 Feb., priced at AU$1,012 found 5 days ago
United
Thu, 18 Sep. - Wed, 24 Sep.
LHR
London
PHL
Philadelphia
AU$1,015 Return, found 6 days ago
AU$1,015
Return
found 6 days ago
Select United flight, departing Thu, 18 Sep. from London to Philadelphia, returning Wed, 24 Sep., priced at AU$1,015 found 6 days ago
American Airlines
Tue, 17 Feb. - Wed, 25 Feb.
LHR
London
PHL
Philadelphia
AU$1,025 Return, found 5 days ago
AU$1,025
Return
found 5 days ago
Select American Airlines flight, departing Tue, 17 Feb. from London to Philadelphia, returning Wed, 25 Feb., priced at AU$1,025 found 5 days ago
Lufthansa
Tue, 17 Feb. - Wed, 25 Feb.
LHR
London
PHL
Philadelphia
AU$1,033 Return, found 5 days ago
AU$1,033
Return
found 5 days ago
Select Lufthansa flight, departing Tue, 17 Feb. from London to Philadelphia, returning Wed, 25 Feb., priced at AU$1,033 found 5 days ago
Swiss International Air Lines
Tue, 17 Feb. - Wed, 25 Feb.
LHR
London
PHL
Philadelphia
AU$1,035 Return, found 5 days ago
AU$1,035
Return
found 5 days ago
Select Swiss International Air Lines flight, departing Tue, 17 Feb. from London to Philadelphia, returning Wed, 25 Feb., priced at AU$1,035 found 5 days ago
American Airlines
Tue, 17 Feb. - Wed, 25 Feb.
LHR
London
PHL
Philadelphia
AU$1,046 Return, found 5 days ago
AU$1,046
Return
found 5 days ago
Select American Airlines flight, departing Tue, 17 Feb. from London to Philadelphia, returning Wed, 25 Feb., priced at AU$1,046 found 5 days ago

Find the cheapest month to fly from London (LON) to Philadelphia (PHL)

September is typically the cheapest month to fly

From AU$669 - AU$1,474 per traveller.

Graph displaying average flight prices per month

Flight from London to Philadelphia route information
Origin airport
Heathrow
Destination airport
Philadelphia Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, British Airways, Delta, Finnair, Iberia, KLM, Lufthansa, United, Virgin Atlantic
Return price
AU$1,002
Distance
5656 km

LON to PHL Flights

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London Airports

London

Heathrow to Philadelphia
AU$1,001.60
*Available to Expedia members.