Dude plan 2 hour delayed for every leg of your flight. If other airlines you are flying have a codeshare with RA then you are fine otherwise you are on your own in BKK, especially returning from KTM.Make sure your bag checked allway through. If you fly with AA they do not check bag allway to KTM connecting with RA. If king have to go somewhere else then you screwed up. No plane for several days. good luck