Cheapest return flights from Philadelphia to London in May from 696€

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

Return flights

01 May - 06 May jetBlue
10 May - 15 May jetBlue
18 May - 04 Jun jetBlue
12 May - 20 May British Airways
01 May - 06 May Finnair direct
10 May - 17 May Finnair direct
01 May - 03 May Finnair direct
28 May - 07 Jun Frontier Airlines
17 May - 30 May jetBlue
11 May - 30 May British Airways
14 May - 30 May Frontier Airlines
07 May - 12 May Finnair direct
26 May - 01 Jun Frontier Airlines
26 May - 09 Jun Frontier Airlines
23 May - 03 Jun Frontier Airlines
28 May - 06 Jun Frontier Airlines
17 May - 05 Jun jetBlue
17 May - 04 Jun jetBlue
17 May - 06 Jun jetBlue
16 May - 04 Jun Frontier Airlines

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

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