1974 - February 1 - Northwest Airlines Timetables, Route Maps and History.
Northwest Airlines Timetables, Route Maps and History - February 1, 1974:
By 1974, Northwest Orient's 22 specially configured Pratt & Whitney DC-10-40s had been delivered. Services were still centered around the Northern tier of the U.S. with schedules to Florida and California. Notice no Asian flights overflew the Tokyo hub at this time.