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Get Airport Info via Airports by Filter API for Tri-Cities Airport Get Airport Info via Airports by Filter API for Tri-Cities Airport Introduction to Tri-Cities Airport Tri-Cities Airport (IATA: TRI, ICAO: KTRI) is located in Blountville, Tennessee, serving the Tri-Cities region, which includes Kingsport, Johnson City, and Bristol. This airport plays a vital role in connecting the region to major domestic destinations, facilitating both business and leisure travel. The geographical significance of Tri-Cities Airport cannot be overstated, as it acts as a gateway to the Appalachian region of the United States, providing essential air travel services to...