The Boeing 377 Stratocruiser was airliner version of the 367 Boeing Stratofreighter, which in turn was the transport version of B-29 Superfortress. It first flew on July 8, 1947. It was generally considered the greatest airliner in the air before the coming of the 707 and was the flagship of the Pan Am fleet.

The Boeing 377 Stratocruiser has a variety of interior configurations which could accommodate 55 to 112 passengers or if equipped as a sleeper, with 28 upper and lower berth units plus five seats. The Boeing 377 Stratocruiser has a maximum speed of 375 mph and a range of 4,200 miles. There's a total 55 Boeing 377 Stratocruisers built. In 1963, B-377s disappeared from service.