Going to Thailand and have a 12 hour lay over in Seoul. I have a "Scotty" jacket thanks to Scott Jordan (it has a LOT of pockets) so I am carrying my meds, contacts, passport, credit cards, toothbrush,cell phone and charger and more. So my carry on is small but I do have that long lay over in Seoul. So do I check my 1 bag or do I carry it on?
TLDR : Answer Summary
For your 12-hour layover in Seoul while traveling to Thailand, you have the option to either check your bag or carry it on. The choice depends on the airline's baggage rules regarding weight and size, as well as your personal preferences regarding accessibility to your belongings during the layover.