PB Air was a Thai regional airline that operated scheduled and charter passenger services within Thailand and to select regional destinations. The carrier focused on connecting smaller Thai cities and tourist destinations, providing an alternative to larger national carriers. The airline operated under the IATA code 9Q and ICAO code PBA, with the callsign PEEBEE AIR. PB Air was based in Bangkok, Thailand, and served a niche market of regional connectivity before eventually ceasing operations. The airline faced challenges common to small regional carriers in Southeast Asia, including fuel costs, competition from low-cost carriers, and the difficulties of sustaining profitability on thinner regional routes.