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

Return flights

17 Sep - 25 Sep	Scandinavian Airlines
03 Sep - 16 Sep	Scandinavian Airlines
13 Sep - 20 Sep	Scandinavian Airlines
19 Sep - 26 Sep	Scandinavian Airlines
29 Sep - 07 Oct	Aer Lingus
30 Sep - 07 Oct	Scandinavian Airlines
30 Sep - 06 Oct	Scandinavian Airlines
29 Sep - 06 Oct	Scandinavian Airlines
11 Sep - 18 Sep	Icelandair
04 Sep - 13 Sep	Scandinavian Airlines
08 Sep - 15 Sep	Lufthansa
12 Sep - 19 Sep	Scandinavian Airlines
01 Sep - 08 Sep	TAP
02 Sep - 09 Sep	TAP
24 Sep - 01 Oct	TAP
13 Sep - 11 Oct	United

Also check the deals for one-way flights from Washington to Nice 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 Nice in September from $497

Return flights