Washington DC (IAD) to Casablanca (CMN): 3,821 miles (6,149 km) great-circle, about 8h 10m nonstop by our estimate. Cheapest fare observed: $865 round-trip on Royal Air Maroc, nonstop, departing May 25, 2026.
$865 round-trip, Royal Air Maroc AT219, departing 2026-05-25 at 21:00, returning 2026-06-21. The recorded itinerary left on a Monday, returning on a Sunday 27 nights later; the fare was observed 30 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $865, it ranked 16th of the 30 round-trip fares we recorded from IAD (median $775). That is 22.6 cents per great-circle mile (round-trip price over one-way distance), close to the IAD median of 22.5 cents across 30 round-trip routes.
Routes from IAD of similar length: Paris (3,851 mi) at $1170 and London (3,667 mi) at $1088.
IAD to CMN is the only one of 30 IAD routes where Royal Air Maroc priced cheapest. It is the 15th longest of the 30 routes we track from IAD.
Of 12 departure airports with a fare to Casablanca, Washington DC (IAD) ranked 6th at $865. Lowest: $205 from Paris (ORY); highest: $1580 from Perth (PER); 3 nonstop. Cheapest-fare airlines (routes): Qatar (2), Royal Air Maroc (2), Air Canada (1), airline TB (1), Egyptair (1) and Etihad (1), plus 4 more.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/New_York, Africa/Casablanca; flight time is our estimate.