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

Return flights

17 May - 19 Jun	Air Canada
18 May - 19 Jun	Air Canada
19 May - 19 Jun	United
19 May - 16 Jun	Air Canada
10 May - 27 May	Iberia
10 May - 22 May	Air France
08 May - 27 May	British Airways
09 May - 27 May	British Airways
17 May - 20 Jun	Air Canada
20 May - 20 Jun	Air Canada
04 May - 10 May	KLM
01 May - 31 May	Lufthansa
08 May - 17 May	Delta
17 May - 22 Jun	KLM
17 May - 24 Jun	KLM
17 May - 25 Jun	KLM
17 May - 26 Jun	KLM
01 May - 31 May	Royal Air Maroc	direct
16 May - 31 May	British Airways
22 May - 29 May	Air France

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 455€

Return flights