AirHint found the following cheapest return flights from Washington (IAD) to Bucharest (OTP) in October 2025 (see full year).

Return flights

22 Oct - 29 Oct	Air Canada
16 Oct - 30 Oct	Turkish Airlines
28 Oct - 04 Nov	SWISS
29 Oct - 05 Nov	Lufthansa
02 Oct - 13 Oct	Turkish Airlines
13 Oct - 27 Oct	Turkish Airlines
27 Oct - 03 Nov	Austrian Airlines
21 Oct - 28 Oct	Finnair
09 Oct - 12 Oct	Turkish Airlines
24 Oct - 31 Oct	SWISS
01 Oct - 08 Oct	Turkish Airlines
02 Oct - 09 Oct	Turkish Airlines
26 Oct - 02 Nov	SWISS
30 Oct - 06 Nov	SWISS
31 Oct - 07 Nov	SWISS
23 Oct - 30 Oct	Turkish Airlines
25 Oct - 01 Nov	SWISS

Also check the deals for one-way flights from Washington to Bucharest in October.

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 Bucharest in October from $558

Return flights