Travel protocol database Safe Travel Barometer looked into which airlines were the safest to fly during COVID-19. Using data collected from over 1,500 companies across 10 industry categories, 50 parameters, and traveler arrival information from more than 80 destinations, it graded airlines on a scale from one to five. This grade was based off scores in three categories: COVID-19 safety protocols, traveler convenience, and service excellence. The number score each airline was given became known as its Safe Travel Score.
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