Their airport free shuttle service is not for 24 hr a day; usually from 8:00AM to 6:00PM; however, if you ask them in advance, the owner/president is nice enough to ask his staff to come in 2 hours earlier to start the free shuttle at 6:00AM. They try to make their customer happy to the extent to stay in business. From the hotel to the ICN international airport terminal T1 and T2 is only 2~3 subway stops away and from the hotel to the subway station is only a few minutes walking distance, and the subway line service starts 5:30 in the morning.