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

Return flights

16 Sep - 30 Sep	TAP
25 Sep - 09 Oct	TAP
02 Sep - 07 Sep	TAP
08 Sep - 20 Sep	Scandinavian Airlines
29 Sep - 31 Oct	Scandinavian Airlines
11 Sep - 20 Sep	Scandinavian Airlines
10 Sep - 20 Sep	Scandinavian Airlines
06 Sep - 12 Sep	Scandinavian Airlines
10 Sep - 17 Sep	Scandinavian Airlines
15 Sep - 21 Sep	Scandinavian Airlines
05 Sep - 12 Sep	Scandinavian Airlines
14 Sep - 22 Sep	TAP
26 Sep - 10 Oct	Scandinavian Airlines
20 Sep - 04 Oct	Scandinavian Airlines
17 Sep - 04 Oct	Scandinavian Airlines

Also check the deals for one-way flights from Washington 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 Washington to Milano in September from $409

Return flights