DL has released the final schedule for this flight:

http://finance.yahoo.com/news/Delta-....html?x=0&.v=1

BTW, I'm pretty sure the SEA arrival time is a typo; should be ~430a.

ETA, or perhaps the departure time was a typo. In theory, DL could use the inbound NRT-PEK airplane to fly to SEA the same evening. But, this would require an earlier departure from NRT.