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

Return flights

02 Dec - 10 Dec	Turkish Airlines
02 Dec - 09 Dec	Turkish Airlines
03 Dec - 25 Dec	Turkish Airlines
04 Dec - 14 Jan	Turkish Airlines
03 Dec - 14 Jan	Turkish Airlines
07 Dec - 15 Jan	Air France
08 Dec - 16 Jan	Air France
10 Dec - 17 Dec	Delta
03 Dec - 07 Dec	TAP
06 Dec - 18 Jan	TAP
29 Dec - 21 Jan	Air Canada
07 Dec - 12 Jan	Iberia
06 Dec - 12 Dec	TAP
05 Dec - 12 Dec	TAP
07 Dec - 17 Jan	TAP
01 Dec - 05 Dec	TAP
15 Dec - 30 Jan	Air Canada
11 Dec - 22 Dec	American Airlines
31 Dec - 18 Jan	Turkish Airlines
11 Dec - 18 Dec	Delta

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 $588

Return flights