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

Return flights

31 Dec - 21 Jan	TAP
28 Dec - 15 Jan	Air France
29 Dec - 16 Jan	KLM
28 Dec - 18 Jan	KLM
30 Dec - 11 Jan	Icelandair
28 Dec - 11 Jan	KLM
29 Dec - 11 Jan	Delta
26 Dec - 17 Jan	British Airways
25 Dec - 14 Jan	TAP
25 Dec - 19 Jan	TAP
28 Dec - 31 Dec	Delta
26 Dec - 28 Dec	KLM
26 Dec - 31 Dec	Delta
27 Dec - 31 Dec	Delta
26 Dec - 28 Dec	Royal Air Maroc	direct
27 Dec - 31 Dec	Royal Air Maroc	direct
28 Dec - 31 Dec	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 $688

Return flights