AirHint found the following cheapest return flights from Washington (IAD) to Tehran (IKA) in December 2025 (see full year).

Return flights

03 Dec - 17 Dec	Turkish Airlines
03 Dec - 16 Dec	Turkish Airlines
01 Dec - 13 Dec	TAP
12 Dec - 16 Jan	Frontier Airlines
05 Dec - 20 Dec	Turkish Airlines
05 Dec - 28 Dec	TAP
05 Dec - 29 Dec	TAP
14 Dec - 16 Jan	Frontier Airlines
13 Dec - 16 Jan	Frontier Airlines
05 Dec - 31 Dec	Austrian Airlines
06 Dec - 01 Jan	TAP
11 Dec - 16 Jan	Finnair
05 Dec - 30 Dec	TAP
06 Dec - 31 Dec	Austrian Airlines
12 Dec - 28 Dec	Frontier Airlines
13 Dec - 13 Jan	Frontier Airlines
11 Dec - 14 Jan	Finnair
12 Dec - 11 Jan	Frontier Airlines
22 Dec - 02 Jan	Austrian Airlines
11 Dec - 15 Jan	Finnair

Also check the deals for one-way flights from Washington to Tehran in December.

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 Tehran in December from $912

Return flights