Yes, the flight number MH370 was officially retired by Malaysia Airlines shortly after the aircraft's disappearance on March 8, 2014. It is a longstanding aviation tradition to retire flight numbers following a major accident or disappearance as a mark of respect for the victims and their families. The return flight number, MH371, was also retired at the same time. These codes were replaced on the Kuala Lumpur to Beijing route with MH318 (outbound) and MH319 (inbound). In 2026, these new numbers remain the standard for the route. Retiring a flight number also serves a practical purpose: it helps prevent confusion in air traffic control systems and avoids triggering traumatic memories for frequent flyers or airline staff who might otherwise be assigned to the same "unlucky" number. The disappearance of MH370 remains one of the greatest mysteries in aviation history, and the retirement of its number is a permanent part of the international record, ensuring that "MH370" will never again appear on a departure board in any airport.