TrekPhongsali.com

AIR
Lao Airlines
Tel: 210794 - Boun Neua airport
Operates a Y-12 to/from Vientiane (one way/return US$92/175, 1.5 hours, Thursday and Sunday) to Boun Neua, about 36km west of Phongsali on Rte 1B (the main road). You then need to wait for the bus heading to Phongsali from Udomxai, which arrives anywhere between 4pm and 6pm and costs US$5. You may also find a sawngthaew  to do the trip for a similar fare.

BOAT
Hat Sa can be reached by boat along the Nam Ou from Muang Khua. In Muang Khua you can choose between slow boats (US$10, six hours) and speedboats (US$13, three hours, departures depend on passenger demand), Either type of boat may be chartered from Muang Khua to Hat Sa for US$80 to US$100, carrying up to 15 passengers in a slow boat or six passengers in a speedboat. Bear in mind, however, that river traffic is sporadic and you may need to wait a day or two for passage. When the river level is low, particularly from March to May, the boat service may be canceled altogether. [...Read more]