Express One International was a United States-based airline that operated primarily as a cargo and charter carrier. Operating under the ICAO code LHN and the radio callsign LONGHORN, the airline was headquartered in the Dallas-Fort Worth area of Texas and held IATA designator EO. The carrier focused on contract freight operations and supplemental charter services, often working with major freight integrators and the U.S. Postal Service. It operated jet aircraft suited to cargo roles, including Boeing 727 freighters, which were common in the industry during its period of activity. Express One International is no longer in operation, having ceased activities in the early 2000s. During its operational years it was a notable player in the U.S. domestic cargo charter segment, competing alongside other supplemental and contract carriers of that era.