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

Return flights

07 Dec - 23 Jan	Frontier Airlines
10 Dec - 18 Dec	Iberia	direct
07 Dec - 23 Jan	Iberia	direct
06 Dec - 10 Dec	Spirit Airlines
06 Dec - 06 Jan	Frontier Airlines
12 Dec - 26 Dec	Iberia	direct
01 Dec - 27 Dec	Iberia	direct
03 Dec - 27 Dec	Iberia	direct
05 Dec - 27 Dec	TAP
27 Dec - 10 Jan	Iberia	direct
05 Dec - 27 Dec	Iberia	direct
13 Dec - 26 Dec	Iberia
01 Dec - 05 Dec	Spirit Airlines
30 Dec - 06 Jan	Frontier Airlines
13 Dec - 26 Dec	Iberia	direct
25 Dec - 01 Jan	Frontier Airlines
19 Dec - 04 Jan	Spirit Airlines
25 Dec - 01 Jan	Iberia	direct
29 Dec - 03 Jan	Lufthansa

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

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 December from $598

Return flights