Worldwide Airline Routes

Flying was innovative and discomforting in the early years of the 20th century. Notwithstanding all of the discomforting and limiting features of air journey, air travel increased in popularity. The number of airline travelers in the U.S. went from less than 6 thousand in 1926 to about 173 thousand in 1929.
Today, commercial flights over 10,000 kilometers (6213.7 miles) are a daily routine.

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