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

Return flights

10 Dec - 14 Jan	Air Canada
09 Dec - 13 Jan	Delta
05 Dec - 30 Dec	Air Canada
13 Dec - 20 Dec	Air Canada
07 Dec - 28 Dec	Air Canada
03 Dec - 28 Dec	Air Canada
02 Dec - 02 Jan	Air Canada
17 Dec - 14 Jan	TAP
13 Dec - 20 Dec	Royal Air Maroc	direct
10 Dec - 14 Jan	Royal Air Maroc	direct
01 Dec - 03 Jan	TAP
07 Dec - 28 Dec	Royal Air Maroc	direct
03 Dec - 28 Dec	Royal Air Maroc	direct
19 Dec - 16 Jan	Air Canada
19 Dec - 16 Jan	Royal Air Maroc	direct
19 Dec - 04 Jan	Royal Air Maroc	direct
19 Dec - 02 Jan	Royal Air Maroc	direct

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 $630

Return flights