AirHint found the following cheapest return flights from Philadelphia (PHL) to Barcelona (BCN) in August 2025 (see full year).

Return flights

20 Aug - 25 Aug	TAP
11 Aug - 20 Aug	Iberia
19 Aug - 26 Aug	United
11 Aug - 20 Aug	British Airways	direct
29 Aug - 06 Sep	Spirit Airlines
25 Aug - 01 Sep	jetBlue
17 Aug - 24 Aug	United
04 Aug - 08 Aug	Spirit Airlines
20 Aug - 31 Aug	jetBlue
21 Aug - 28 Aug	United
20 Aug - 25 Aug	British Airways	direct
02 Aug - 09 Aug	Spirit Airlines
27 Aug - 03 Sep	United
31 Aug - 07 Sep	United
29 Aug - 05 Sep	United
29 Aug - 06 Sep	American Airlines	direct
25 Aug - 01 Sep	British Airways	direct

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

Book a cheap hotel in Barcelona

Cheap car rent in Barcelona

Cheapest return flights from Philadelphia to Barcelona in August from $614

Return flights