Cheapest return flights from Philadelphia to London in May from $517

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

Return flights

12 May - 19 May British Airways
10 May - 17 May Aer Lingus
01 May - 08 May Aer Lingus
10 May - 17 May British Airways direct
01 May - 08 May British Airways direct
02 May - 09 May British Airways direct
31 May - 03 Jun jetBlue
31 May - 20 Jun British Airways direct
31 May - 04 Jun jetBlue
31 May - 03 Jun Finnair direct

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

Skyscanner

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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