We are holding two overnight sleeper tickets departing Chiang Mai 1935 hrs. Jan. 2, 2026, and arriving Bangkok 0810 hrs. Jan. 3, 2026.  We would like to stay in chiang Mai one day longer.  Is there anyone in the opposite position; holding southbound tickets for Jan. 3, but wanting to travel a day earlier ?  We would accept tickets on the same schedule as above, and would also consider daytime tickets on Jan. 3; say leaving Chiang Mai at breakfast time and arriving in Bangkok at dinner time.

The tickets do not have our names on them, so swapping should not be a problem.  The swap would need to be done in Chiang Mai during daytime hours on Jan.2, but could be done earlier if you are in Bangkok.

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Is your name not hiding behind the QR code?  I thought they introduced ID matching some time ago.