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Southwest Airways began commercial commuter passenger operations in 1946. Based in San Francisco, Southwest initially operated war-surplus Douglas C-47s on nine-stop routes between San Francisco and Los Angeles. Southwest Airways was renamed Pacific Air Lines in 1958 and merged with Bonanza Air Lines and West Cost Airlines to form Air West in 1968. #ThrowbackThursday San Francisco International Airport hangar apron 1948 SFO Museum Collection 2011.032.0209 This image was posted on February 25, 2016.