Ukrainian drone strikes on the Moscow region remain the dominant driver of repeated flight restrictions at Sheremetyevo, Domodedovo, and Vnukovo airports. Russian authorities, including Rosaviatsiya, have imposed simultaneous temporary suspensions of arrivals and departures multiple times in 2026—most recently on August 21—while air defenses intercepted incoming UAVs, citing airspace safety. Large-scale attacks in June and July, involving dozens to hundreds of drones, produced similar multi-hour closures and widespread cancellations, often coinciding with strikes on nearby infrastructure. As of late August, such incidents continue amid the broader conflict, with the market focused on whether all three primary airports face concurrent restrictions again before the August 31 resolution date. No other causes have triggered comparable coordinated shutdowns in recent weeks.