Relax

I highly recommend Spa on Air at Incheon airport as a great way to kill time, catch up on sleep, and relax before a flight. I arrived at the airport at 4.30 and was told the spa was very busy so decided against going in, choosing instead to go and read my book for a bit. I went back at 6 and had the place to myself, 4 hours of sleep, and an hour and a half of hot tubs, saunas, and a shower later and I'm really refreshed and ready for my flight....and all for the grand total of 15000won (about $15 or 8quid)