AirHint found the following cheapest return flights from Philadelphia (PHL) to Lisbon (LIS) in July 2026 (see full year).

Return flights

07 Jul - 23 Jul	Aer Lingus
23 Jul - 29 Jul	Aer Lingus
08 Jul - 22 Jul	Spirit Airlines
02 Jul - 06 Jul	Aer Lingus
08 Jul - 22 Jul	British Airways	direct
07 Jul - 23 Jul	British Airways	direct
03 Jul - 06 Jul	Lufthansa
03 Jul - 06 Jul	British Airways	direct
02 Jul - 06 Jul	British Airways	direct

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

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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Cheapest return flights from Philadelphia to Lisbon in July from 857€

Return flights