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

Return flights

11 Dec - 18 Dec	Air Canada
11 Dec - 23 Dec	Air Canada
07 Dec - 17 Dec	Air France
10 Dec - 30 Jan	Air France
01 Dec - 30 Jan	KLM
09 Dec - 22 Dec	Air France
12 Dec - 24 Dec	KLM
14 Dec - 25 Dec	Air France
15 Dec - 30 Jan	Air France
01 Dec - 31 Dec	KLM
15 Dec - 21 Dec	KLM
26 Dec - 09 Jan	Lufthansa
15 Dec - 26 Dec	Air France
24 Dec - 14 Jan	Delta
15 Dec - 30 Dec	Air France
17 Dec - 05 Jan	TAP
17 Dec - 07 Jan	TAP
10 Dec - 30 Jan	Royal Air Maroc	direct
15 Dec - 30 Jan	Royal Air Maroc	direct
18 Dec - 05 Jan	TAP

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 542€

Return flights