Indeed they connect with Chiang Mai twice a week and Bangkok’s Don Mueang Airport no less than four times per day. The Chiang Mai flight, departs Fridays and Sundays at 14:50 and costs around 1,890 baht while the Bangkok planes leave at 08:45, 10:35, 12:45 and 17:05 with prices varying widely between 1,500 and 3,000 depending upon time and date.
Nan’s tiny airport is located just to the north of the town and its code is NNT.