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

Return flights

07 Sep - 17 Sep	Air Canada
19 Sep - 05 Oct	Frontier Airlines
25 Sep - 28 Sep	Frontier Airlines
26 Sep - 29 Sep	Frontier Airlines
06 Sep - 10 Sep	Copa
17 Sep - 21 Sep	Copa
06 Sep - 13 Sep	Copa
19 Sep - 21 Sep	Copa
11 Sep - 21 Sep	Copa
09 Sep - 20 Sep	Copa
13 Sep - 20 Sep	Copa
26 Sep - 01 Oct	Copa
24 Sep - 01 Oct	Copa
26 Sep - 01 Oct	United	direct

Also check the deals for one-way flights from Washington to Punta Cana 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 Punta Cana in September from 316€

Return flights