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

Return flights

06 May - 10 Jun	KLM
03 May - 26 May	British Airways
09 May - 10 Jun	KLM
24 May - 15 Jun	KLM
01 May - 31 May	Royal Air Maroc	direct
03 May - 26 May	Royal Air Maroc	direct
06 May - 10 Jun	Royal Air Maroc	direct
01 May - 17 May	Royal Air Maroc	direct
26 May - 24 Jun	KLM
24 May - 12 Jun	TAP
22 May - 14 Jun	TAP
26 May - 24 Jun	Royal Air Maroc	direct
27 May - 22 Jun	Royal Air Maroc	direct
22 May - 15 Jun	Royal Air Maroc	direct
08 May - 24 May	Royal Air Maroc	direct

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 $563

Return flights