Cheap flights from Philadelphia to Great Britain

View AU$536 flight on Mon, 1 Sep. 2025Opens in a new window

Popular airlines from Philadelphia to Great Britain

  • British Airways

    British Airways

  • Virgin Atlantic

    Virgin Atlantic

  • American Airlines

    American Airlines

  • Delta

    Delta

  • United

    United

  • Air Canada

    Air Canada

  • Finnair

    Finnair

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Cheap Flights from Philadelphia (ILG) to Great Britain (LON)

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.

Aer Lingus
Wed, 29 Oct. - Thu, 13 Nov.
PHL
Philadelphia
LHR
London
AU$733 Return, found 5 days ago
AU$733
Return
found 5 days ago
Select Aer Lingus flight, departing Wed, 29 Oct. from Philadelphia to London, returning Thu, 13 Nov., priced at AU$733 found 5 days ago
Virgin Atlantic
Mon, 11 Aug. - Tue, 26 Aug.
PHL
Philadelphia
LHR
London
AU$795 Return, found 8 hours ago
AU$795
Return
found 8 hours ago
Select Virgin Atlantic flight, departing Mon, 11 Aug. from Philadelphia to London, returning Tue, 26 Aug., priced at AU$795 found 8 hours ago
Delta
Wed, 29 Oct. - Thu, 13 Nov.
PHL
Philadelphia
LHR
London
AU$804 Return, found 5 days ago
AU$804
Return
found 5 days ago
Select Delta flight, departing Wed, 29 Oct. from Philadelphia to London, returning Thu, 13 Nov., priced at AU$804 found 5 days ago
British Airways
Wed, 29 Oct. - Thu, 13 Nov.
PHL
Philadelphia
LHR
London
AU$839 Return, found 5 days ago
AU$839
Return
found 5 days ago
Select British Airways flight, departing Wed, 29 Oct. from Philadelphia to London, returning Thu, 13 Nov., priced at AU$839 found 5 days ago
Air France
Mon, 17 Nov. - Wed, 26 Nov.
PHL
Philadelphia
LHR
London
AU$885 Return, found 5 days ago
AU$885
Return
found 5 days ago
Select Air France flight, departing Mon, 17 Nov. from Philadelphia to London, returning Wed, 26 Nov., priced at AU$885 found 5 days ago
KLM
Thu, 7 Aug. - Thu, 14 Aug.
PHL
Philadelphia
LHR
London
AU$950 Return, found 10 hours ago
AU$950
Return
found 10 hours ago
Select KLM flight, departing Thu, 7 Aug. from Philadelphia to London, returning Thu, 14 Aug., priced at AU$950 found 10 hours ago

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

September is typically the cheapest month to fly

From AU$743 - AU$1,295 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.