Northwest began flying passengers in 1927. In 1928, the airline started its first international route with service to Winnipeg, Canada. The airline's operations were expanded to smaller cities in the region by the end of the decade. In 1931 Northwest sponsored Charles and Anne Lindbergh on a pioneering flight to Japan, scouting what would become known as the Northwest Airlines Great Circle route, and proving that flying through Alaska could save as much as 2,000 miles on a New York-Tokyo route. In 1933, Northwest was designated to fly the Northern Transcontinental Route from New York City to Seattle, Washington; it adopted the name Northwest Airlines the following year as a result of the Air Mail Scandal. Northwest stock began to be publicly traded in 1941.