I've got a few days off in a row next month and really wanted to go to Chiang Mai, but I feel like I need at least 4 travel days for that trip which would eat up too many of my days off -- plus can't get there on DAL metal which removes a warm fuzzy from the nonrev picture. Was thinking perhaps Tokyo as I've never been there, any recommendations on the min days to spend there as well as a best departure city to assure Delta 1?

TIA