I expect that this will be too tight of a connection, too much risk and so will not do it.
I will fly from Chiang Rai (or Chiang Mai) to domestic airport (Don Mueang) arriving at 15:45 on Sunday, January 6 and would need to get to BKK for international flight that departs at 18:05. This allows 2:20 to connect; (if I fly in from Chiang Mai I will have 2:30 to connect).
1) About how long does it take late Sunday afternoon to take a taxi to BKK from Don Mueang? If it is more than 30 minutes, you can probably ignore the other questions below.
2) I'd plan to only have carry-on for the flight from Chiang Rai to Don Mueang airport. I expect that carry-on luggage room is small. Do you think if I split the content of my soft-sided small back pack and gave half of it to my son that that would work. Clearly there would be no time to wait for any checked baggage if one were to try to make this international connecting flight.
Thai Airways indicated that it is 27km between the two airports and thought it would take at least 30 minutes to travel it. But as always I find the advice of people on the forum to often be more accurate and helpful.
3) I will do my own research by checking flight status online report. For Nok-Air domestic flights, any experience with how frequently and what the length of delays might be like in January?
Thanks so much, Edward