1937. A new passenger terminal opened in 1937, built with Public Works Administration funding. The March 1939 Official Aviation Guide shows 18 airline departures on weekdays—seventeen United flights and one TWA flight. The August 1952 chart shows runway 1L 7,000 feet long, 1R 7,750 feet, 28L 6,500 feet, and 28R 8,870 feet. In addition to United, Pacific Seaboard Air Lines flew between San Francisco and Los Angeles in 1933; the Bellanca CH-300s flew San Francisco – San Jose – Salinas – Monterey – Paso Robles – San Luis Obispo – Santa Maria – Santa Barbara – Los Angeles. Competition with United led Pacific Seaboard to move all of its operations to the eastern U.S., and rename itself Chicago and Southern Air Lines (C&S). It became a large domestic and international air carrier. Chicago & Southern was acquired by and merged into Delta Air Lines in 1953, giving Delta its first international routes. Delta used the route authority inherited from C&S to fly one of its first international services operated with Convair 880 jet aircraft from San Francisco to Montego Bay, Jamaica and Caracas, Venezuela via intermediate stops in Dallas and New Orleans in 1962. World War II During World War II the airport was used as a Coast Guard base and Army Air Corps training and staging base. The base was called Naval Auxiliary Air Facility Mills Field and Coast Guard Air Station, San Francisco. Pan American World Airways (Pan Am), which had operated international flying boat service from Treasure Island, had to move its Pacific and Alaska seaplane operations to SFO in 1944 after Treasure Island was expropriated for use as a military base. Pan Am began service from SFO after World War II with five weekly flights to Honolulu, one of which continued to Canton Island, Fiji, New Caledonia, and Auckland. International operations The first service by foreign carriers was on Australian National Airways (ANA) Douglas DC-4s flown by British Commonwealth Pacific Airlines. Sydney – Auckland – Fiji – Kanton Island – Honolulu – San Francisco – Vancouver, BC. The first flight left Australia on September 15, 1946. In 1947 Pan American World Airways began its "round the world" flights from SFO to Guam, Japan, the Philippines, China and other countries; Pan Am also flew to Sydney from SFO. 1947 saw the start of United Airlines Douglas DC-6 flights to Hawaii and Philippine Airlines flights to Manila. TWA