Detailed flight info from official website: www.leeseunggi.com and some DM’s by fellow Airens:
Here’s Seung Gi’s flight information: (Korea and Japan are in the same time zone) …
Korean Airlines flight #2707 leaving Gimpo at 9am, 10/5/13 KST/JST for Haneda Airport. Arriving in Japan at 11:05am JST/KST
Korean Airlines flight #2710 leaving Haneda at 7:55pm,10/8/13 JST/KST for Gimpo Airport. Arriving in Korea at 10:10pm KST/JST.
Credit: leeseunggi.com, Gimpo International airport website, DM’s from Airens