The United Airlines Boeing 777-200 carries 364 passengers across United First + Economy Plus + Economy. Power and Wi-Fi are available on this aircraft. Every seat is rated below, so you can see which have the legroom, the window alignment and the quiet — and which sit next to a galley or lavatory.
The seats rated best on this map are 16D, 16E, 16F, 16G, 17A, 17B. Another 35 seats are rated best or good. Look for 114 extra-legroom seats for the most room.
Seats rated avoid on this map are 4A, 4B, 4K, 4L, 29L, 35D. Another 28 seats are rated avoid. These are usually the back rows near the galley and lavatories, or middle seats with no window or aisle.