Cheapest return flights from Philadelphia to London in May from $638

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

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

Return flights

25 May - 03 Jun Spirit Airlines
26 May - 09 Jun Frontier Airlines
27 May - 04 Jun Spirit Airlines
26 May - 30 May Spirit Airlines
30 May - 04 Jun Spirit Airlines
22 May - 28 May jetBlue
19 May - 09 Jun Spirit Airlines
22 May - 29 May Frontier Airlines
30 May - 03 Jun Spirit Airlines
21 May - 28 May Frontier Airlines
28 May - 03 Jun Frontier Airlines
17 May - 01 Jun Spirit Airlines
19 May - 26 May Spirit Airlines
19 May - 23 May Frontier Airlines
20 May - 30 May Spirit Airlines
20 May - 27 May Frontier Airlines
16 May - 18 May Frontier Airlines

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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