It seems that Daesung was on an earlier flight as he arrived at Kansai Airport, Osaka also at the same time.
Credit on photo. Uncredited pictures from Gimpo by Irrris.
Please click on the thumbnails for a larger photo.
Taeyang arriving at Gimpo Airport, Seoul from Beijing:
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specified directory - https://bigbangmusic.info/images/flickr/2015-01-15-yb-gimpo
TOP, G-Dragon and Seungri leaving Gimpo Airport, Seoul to Osaka:
More short video at: http://www.meipai.com/media/225283346, http://www.meipai.com/media/225308991
Daesung arrival Kansai Airport, Osaka:
Arrival G-Dragon, TOP and Seungri at Osaka Kansai Airport: