A British Airways Boeing 777 on a transatlantic route to Chicago declared an emergency on October 5, 2026, after dropping roughly 27,000 feet in altitude. The aircraft turned back and returned to London safely. Cabin depressurization was identified as the reason for the emergency.

A passenger on board reported a sudden drop in altitude and pressure during the incident. The alarming event unfolded over the Atlantic before the crew made the decision to divert. The flight's diversion was reported by multiple outlets including Sky News, CBS News, and The Guardian.