AirHint found the following cheapest return flights from Washington (IAD) to Casablanca (CMN) in May 2026 (see full year).

Return flights

18 May - 25 May	Iberia
05 May - 15 Jun	KLM
03 May - 11 May	KLM
05 May - 12 May	KLM
06 May - 13 May	Air France
14 May - 21 May	Virgin Atlantic
17 May - 26 May	Brussels Airlines
03 May - 11 May	Royal Air Maroc	direct
01 May - 20 May	Royal Air Maroc	direct
01 May - 06 Jun	Royal Air Maroc	direct
15 May - 23 May	Icelandair
15 May - 25 May	Icelandair
01 May - 10 Jun	Icelandair
20 May - 10 Jun	Icelandair
19 May - 19 Jun	United
19 May - 18 Jun	KLM
24 May - 12 Jun	Porter Airlines (Canada) Ltd
26 May - 04 Jun	TAP
26 May - 24 Jun	Royal Air Maroc	direct
25 May - 12 Jun	Porter Airlines (Canada) Ltd

Also check the deals for one-way flights from Washington to Casablanca in May.

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 May from 599€

Return flights