Flight Time from Las Vegas (LAS) to Chiang Mai (CNX)

Airlines planning the LAS → CNX leg start from the same arithmetic this page uses: 12,928 km ÷ 850 km/h, then the 40-minute airport allowance. The slider's steps are anchored on typical hub dwell times, which is why the totals sit at 19.4 h and 23.4 h rather than pure multiples.

Past the 9,000 km mark this is an ultra-long-haul sector: the 15.88 hours in the air plus cabin time makes a one-stop routing with a lounge stop worth pricing against the non-stop. Between UTC−8 and UTC+7 you gain a 15-hour head start on the day — worth remembering when you schedule the first dinner or call.

Bangkok (BKK) is the nearest alternative endpoint, 582 km from Chiang Mai — close enough that some fares from LAS price it as the same destination. From LAS, reaching BKK instead takes about 1.4 h — less airborne time than the 15.88 h non-stop, and the surface leg into Chiang Mai still has to be won back.

Companion flight-time pages exist for 1 of these alternatives (BKK first among them) — see Related calculators. Remember the destination is the point: any airport below that adds more than a couple of hours of surface time to reach Chiang Mai needs a substantial fare gap to justify.

Leave Las Vegas at 10:00 and the local arrival clock in Chiang Mai reads about 16:53, which tells you whether day one is recoverable. Daily spend shifts at landing: $59 in Chiang Mai against $210 at home in Las Vegas, using the dataset's mid-range figures.

On those numbers Chiang Mai is the cheaper place to linger — the gap is $151 per day, which over a week funds a second flight. With 15 hours gained eastbound, the 12,928 km out to Chiang Mai ends in a serious jet-lag bill — plan a quiet first day.