Cheapest return flights from Philadelphia to London in May from $622

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

04 May - 19 May jetBlue
10 May - 20 May jetBlue
11 May - 18 May jetBlue
01 May - 06 May jetBlue
12 May - 19 May jetBlue
01 May - 13 May jetBlue
13 May - 23 May jetBlue
01 May - 10 May jetBlue
01 May - 06 May British Airways direct
01 May - 13 May British Airways direct
16 May - 02 Jun Finnair
22 May - 06 Jun jetBlue
16 May - 02 Jun British Airways direct
29 May - 10 Jun Finnair
26 May - 02 Jun United
22 May - 06 Jun British Airways direct
29 May - 10 Jun British Airways direct
22 May - 15 Jun jetBlue
31 May - 07 Jun United
22 May - 15 Jun American Airlines 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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