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

Return flights

29 Sep - 07 Oct	SWISS
30 Sep - 07 Oct	Turkish Airlines
28 Sep - 07 Oct	Turkish Airlines
29 Sep - 06 Oct	Frontier Airlines
28 Sep - 03 Oct	Frontier Airlines
20 Sep - 11 Oct	Turkish Airlines
18 Sep - 23 Sep	Brussels Airlines
18 Sep - 23 Sep	United	direct

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.

Book a cheap hotel in Nice

Cheap car rent in Nice

Cheapest return flights from Washington to Nice in September from $620

Return flights