Distance between Ubon Ratchathani and Phrae is 643.47 km.
This distance is equal to 399.83 miles, and 347.21 nautical miles.
The distance line on map shows distance from Ubon Ratchathani to Phrae between two cities.
If you travel with an airplane (which has average speed of 560 miles) between Ubon Ratchathani to Phrae,
It takes 0.71 hours to arrive.