AirHint found the following cheapest return flights from Phoenix (PHX) to Lisbon (LIS) in August 2025 (see full year).

Return flights

30 Aug - 13 Sep	Air France
31 Aug - 20 Sep	Air France
30 Aug - 20 Sep	British Airways
19 Aug - 26 Aug	Air Canada
19 Aug - 13 Sep	Air Canada
29 Aug - 08 Sep	Spirit Airlines
19 Aug - 31 Aug	Delta
29 Aug - 14 Sep	Spirit Airlines

Also check the deals for one-way flights from Phoenix to Lisbon in August.

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 Phoenix to Lisbon in August from 741€

Return flights