Cheapest return flights from Philadelphia to London in May from $608

Best time to book flights for Philadelphia (PHL) to London (LHR) flights at AirHint

AirHint found the following cheapest return flights from Philadelphia (PHL) to London (LHR) in May 2025 (see full year).

Return flights

03 May - 08 May jetBlue
04 May - 11 May jetBlue
06 May - 11 May Spirit Airlines
07 May - 21 May Aer Lingus
11 May - 21 May Aer Lingus
13 May - 23 May Iberia direct
18 May - 25 May Aer Lingus
16 May - 02 Jun Aer Lingus
02 May - 11 May jetBlue
11 May - 21 May Iberia direct
10 May - 20 May British Airways
20 May - 03 Jun British Airways
21 May - 03 Jun American Airlines
21 May - 04 Jun American Airlines
21 May - 01 Jun British Airways
25 May - 02 Jun Aer Lingus
26 May - 04 Jun Aer Lingus
26 May - 02 Jun Aer Lingus
27 May - 10 Jun American Airlines
25 May - 02 Jun Iberia direct

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

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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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