Cheapest return flights from Philadelphia to London in September from $684

AirHint found the following cheapest return flights from Philadelphia (PHL) to London (LGW) in September 2026 (see full year).

Return flights

10 Sep - 17 Sep jetBlue
08 Sep - 22 Sep British Airways
11 Sep - 25 Sep British Airways
05 Sep - 19 Sep Aer Lingus
05 Sep - 11 Sep Icelandair

Also check the deals for one-way flights from Philadelphia to London in September.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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