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

Return flights

01 Oct - 15 Oct	Spirit Airlines
15 Oct - 24 Oct	Spirit Airlines
22 Oct - 29 Oct	Spirit Airlines
22 Oct - 30 Oct	Spirit Airlines
01 Oct - 01 Nov	jetBlue
21 Oct - 04 Nov	jetBlue
21 Oct - 28 Oct	Spirit Airlines
20 Oct - 27 Oct	TAP
14 Oct - 21 Oct	TAP
21 Oct - 27 Oct	TAP
22 Oct - 18 Nov	TAP
19 Oct - 26 Oct	TAP
22 Oct - 09 Nov	TAP
15 Oct - 02 Nov	TAP
04 Oct - 09 Nov	TAP
15 Oct - 24 Oct	American Airlines	direct
22 Oct - 18 Nov	British Airways	direct
25 Oct - 01 Nov	United
01 Oct - 01 Nov	Finnair	direct
15 Oct - 02 Nov	Finnair	direct

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

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 Barcelona in October from $480

Return flights