the airport had other long flights: Braniff was flying nonstop from Hobby to Panama City, Panama with Boeing 707s and Boeing 720s in the late 1960s. Braniff's April 1969 timetable lists nonstop 707 service to Hawaii; however, Braniff flights from Houston to Hawaii didn't actually start until September 1, after the move to IAH. (Hobby's 7600-ft runways would have been too short for 707 nonstop service to Hawaii.) Houston Intercontinental Airport (IAH), now George Bush Intercontinental Airport, opened in June 1969; the airlines moved to Intercontinental and Hobby was left with no scheduled passenger service. The Civil Aeronautics Administration recommended years earlier that Houston plan to replace Hobby. International service in the 1960s Previously, KLM and Pan American World Airways (Pan Am) operated international flights from the International Building at Hobby until the late 1960s. In 1966, Pan Am was operating a daily Boeing 707 flight nonstop to Mexico City with continuing, no change of plane service to Guatemala City, Guatemala; San Salvador, El Salvador; Managua, Nicaragua; San José, Costa Rica and Panama City, Panama. In 1969, both airlines moved to IAH and the International Building was demolished. Braniff International operated international service as well from the airport and in the spring of 1966 was operating nonstop Boeing 707 and Boeing 720 jet service twice a week to Panama City, Panama with connections in Panama to other Braniff flights to South America. Also in 1966, Braniff was operating a joint international service via an interchange agreement with Pan Am to London, England and Frankfurt, Germany on a daily basis with Boeing 707 jetliners via intermediate stops at Dallas Love Field and Chicago O'Hare Airport. Aeronaves de Mexico (now Aeromexico) served Hobby as well with flights to Mexico and in the spring of 1968 was operating Douglas DC-9-10 jet service nonstop to Monterrey with continuing, no change of plane service several days a week to Guadalajara and Acapulco. Trans-Texas Airways also served Mexico and in 1968 was operating direct, no change of plane service from Hobby with Convair 600 turboprops eleven times a week to Monterrey and six times a week to Tampico and Veracruz via south Texas. Resumption of airline service The first airline to resume passenger flights was Houston Metro Airlines, a commuter airline, which in early 1970 was flying "cross town" service with de Havilland Canada DHC-6 Twin Otters between Hobby and Houston Intercontinental Airport (IAH) with 14