Cheapest return flights from Philadelphia to Lisbon in May from $771

Best time to book flights for Philadelphia (PHL) to Lisbon (LIS) flights at AirHint

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

Return flights

03 May - 12 May TAP
03 May - 10 May Aer Lingus
21 May - 28 May Spirit Airlines
04 May - 14 May Spirit Airlines
28 May - 11 Jun TAP
06 May - 13 May United
21 May - 25 May Spirit Airlines
11 May - 18 May United
16 May - 23 May United
23 May - 31 May Air Canada
03 May - 10 May British Airways direct
25 May - 04 Jun Iberia direct
26 May - 02 Jun United
31 May - 07 Jun United
28 May - 11 Jun Finnair direct

Also check the deals for one-way flights from Philadelphia to Lisbon 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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