Booking via UA is still in play. Looks like you can do OZ 777 to OZ A380

Hong Kong, HK, CN (HKG) to Seoul, KR (ICN - Incheon)
1:10 pm - 5:40 pm (3h 30m)
OZ 722 | Boeing 777-200LR
Operated By Asiana Airlines

2h 40m connection
Seoul, KR (ICN - Incheon) to Los Angeles, CA, US (LAX)
8:20 pm - 3:30 pm (11h 10m)
OZ 204 | Airbus A380-800
Operated By Asiana Airlines
Business
(I)
Dinner

80k/person with 4 seat available. You should have lie flats on HKG - ICN and will definitely have lie flats on ICN - HKG