EDIT: Reservation re-opened as of 17FEB17
United Airlines this week has closed reservation for First Class service on San Francisco – Tokyo Narita route, for travel on/after 24MAY17 (SFO departure). This route is currently operated by Boeing 747-400 aircraft on daily basis. The closure of First Class cabin booking is also in effect for winter 2017/18 season from 29OCT17, tentatively scheduled with 777-200ER aircraft.
UA837 SFO1140 – 1410+1NRT 744 D
UA838 NRT1710 – 1040SFO 744 D