The only time one can swap seats is during landing, but the middle seat also offers clear views due to the helicopter's large glass windows. We split passengers at a place called Pheriche at 4300 meters (13000 feet). Once we do a double shuttle and fly 2 or 3 people, all passengers are guaranteed window seats for the base camp portion of this Everest helicopter flight excursion. Pheriche to Everest Base Camp is the principal mountain flight, and the passengers will be placed in the window seats.