Cheapest return flights from Philadelphia to Lisbon in May from 547€

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

08 May - 22 May Delta
14 May - 19 May Delta
16 May - 22 May Spirit Airlines
04 May - 14 May Frontier Airlines
24 May - 07 Jun Aer Lingus
16 May - 25 May Spirit Airlines
08 May - 12 May Spirit Airlines
18 May - 25 May Aer Lingus
01 May - 11 May Aer Lingus
21 May - 26 May Aer Lingus
12 May - 26 May Aer Lingus
23 May - 02 Jun TAP
26 May - 02 Jun United
29 May - 05 Jun United
24 May - 07 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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