AirHint found the following cheapest return flights from Philadelphia (PHL) to Milano (MXP) in September 2025 (see full year).

Return flights

18 Sep - 06 Oct	Condor
19 Sep - 26 Sep	Frontier Airlines
30 Sep - 04 Oct	Frontier Airlines
21 Sep - 28 Sep	Frontier Airlines
25 Sep - 12 Oct	United
16 Sep - 11 Oct	Spirit Airlines
21 Sep - 28 Sep	British Airways	direct
16 Sep - 11 Oct	British Airways	direct
18 Sep - 06 Oct	British Airways	direct
30 Sep - 04 Oct	British Airways	direct

Also check the deals for one-way flights from Philadelphia to Milano in September.

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 Milano in September from 575€

Return flights