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

Return flights

03 Dec - 10 Dec	TAP
02 Dec - 09 Dec	Turkish Airlines
03 Dec - 24 Dec	Turkish Airlines
03 Dec - 12 Dec	Turkish Airlines
03 Dec - 14 Jan	TAP
06 Dec - 18 Jan	TAP
10 Dec - 14 Dec	TAP
08 Dec - 13 Dec	Turkish Airlines
03 Dec - 10 Dec	Royal Air Maroc	direct
08 Dec - 13 Dec	Royal Air Maroc	direct
29 Dec - 11 Jan	TAP
14 Dec - 14 Jan	TAP
10 Dec - 10 Jan	TAP
26 Dec - 18 Jan	TAP
14 Dec - 10 Jan	Frontier Airlines
10 Dec - 14 Dec	Royal Air Maroc	direct
13 Dec - 11 Jan	Frontier Airlines
15 Dec - 30 Jan	TAP
13 Dec - 07 Jan	Frontier Airlines
15 Dec - 24 Dec	Air France

Also check the deals for one-way flights from Washington to Casablanca 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 Casablanca in December from 553€

Return flights