UBP meaning in Airport Code ?

Ubon Ratchathani (Thai: อุบลราชธานี, pronounced [ʔubon râːt.tɕʰa.tʰaːniː]) is one of the four major cities of Isan (with Khorat/Nakhon Ratchasima, Udon Thani, and Khon Kaen), also known as the "big four of Isan." The city is on the Mun River in the southeast of the Isan region of Thailand, and is located 615 km (382 mi) away from Bangkok. It is known as Ubon (อุบลฯ) for short. The name means "royal lotus city". Ubon is the administrative center of Ubon Ratchathani Province.

As of 2006, the Ubon Ratchathani urban area had a population of about 200,000. This included 85,000 in Thetsaban Nakhon Ubon Ratchathani (Ubon municipality), 30,000 each in Thetsaban Mueang Warin Chamrap (Warin municipality) and Thetsaban Tambon Kham Yai, 24,000 in Thetsaban Tambon Saen Suk, 10,000 each in Thetsaban Tambon Pathum and Tambon Kham Nam Saep, and 6,000 in Thetsaban Tambon Ubon.