Cheapest return flights from Philadelphia to London in May from $702

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

Return flights

13 May - 21 May Air Canada
13 May - 21 May British Airways direct
11 May - 16 May jetBlue
27 May - 09 Jun Aer Lingus
25 May - 31 May jetBlue
25 May - 30 May TAP
22 May - 07 Jun Aer Lingus
27 May - 09 Jun Finnair direct
25 May - 31 May 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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