Before the case, the only U.S. airlines permitted to fly transpacific routes were Pan Am and Northwest Orient.
In 1954 Northwest Orient purchased DC-6Bs and started flying them to Tokyo and Manila.
Pan American World Airways and Northwest Orient began service to Naha in 1947.
It is the hub for Northwest Orient and is also served by American, Continental, Delta and Eastern.
The only airline that serves the Duluth Airport is Northwest Orient.
In late 1977, three Boeing 707s were acquired from Northwest Orient.
Guangzhou is the third city in China to be served by Northwest, which began flying there in 1947, when it was known as Northwest Orient.
Pan Am and Northwest Orient used Haneda as a hub.
Northwest Orient's president, Donald Nyrop, authorized payment of the ransom and ordered all employees to cooperate fully with the hijacker.
Northwest Orient offered a reward of 15 percent of the recovered money, to a maximum of $25,000.