The deal is only available leaving San Francisco, but offers service to Tokyo, Osaka and Nagoya. The catch: you have to depart on a weekday (Monday to Thursday). Weekend flights are available for another $100.
With its renowned "Shell Seat," Premium Economy offers slightly more leg room and several first-class-esque amenities including multiple meals, hors d' ourves, desserts and premium check-in and lounge access.
IACE's offer goes through March 31. See the website for information and reservations.