“Mainliner Hawaii” thejivebombers Airliners & Travel March 16, 2018October 12, 2019 1 Minute United Airlines never made much money from their Boeing 377’s. I’ll let my dad (UAL pilot 1945-81) give his verdict: “The 377 was one expensive mother to operate.” The beast seen here is N31225, “Mainliner Hawaii.” Share this:TwitterFacebookLike this:Like Loading... Related Published by thejivebombers View all posts by thejivebombers Published March 16, 2018October 12, 2019