The most popular and convenient way to travel to Udon Thani is by air. There are many flights operating daily from Bangkok to Udon Thani. The airlines that service Bangkok-Udon Thani flights include Thai Airway, Pkuket Air, Nok Air and Air Asia. It usually takes about one hour. If you want to visit Udon Thani from other provinces nearby, there are buses running between Udon Thani and other provinces including Nong Khai, Loei, Khon Kaen, Sakon Nakhon, Nakhon Phanom and Ubon Ratchathani. The buses leave Udon Thani Bus Terminal every 40 minutes.