Now that there are LCC's to Chiang Mai, is taking the overnight train still a good idea? The most recent entries about the Thai trains I found on this route were from 2014. Some of those posts talked about poor sanitation and derailments. Seat61.com highly recommends it, but it is the BKK-CNX route and not the reverse to BKK. Are the schedule timings reliable enough to arrive in Bangkok about 6 am and then run out to BKK airport for a 9:50 am flight (in biz class).