A return flight from Lisbon to New York generates | |
And sell more flight tickets carriers do. Passengers crisscross the globe four billion times annually. Each can pick from over 22,000 routes flown by over 25,000 commercial jets that collectively account for over 42 million flights. That puts total miles travelled in the air globally in the trillions, a potential gold mine for frequent fliers often courted by carriers. | |
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