KEY POINTS
  • Airline unions have pushed for a federal mask mandate to help back up carriers' policies.
  • All major U.S. airlines require masks on board and carriers have banned more than 2,500 passengers for refusing to follow the policy.
  • President Biden also said travelers entering the U.S. must self-quarantine upon arrival.
Passengers, almost all wearing face masks, board an American Airlines flight to Charlotte, on May 3, 2020, in New York City.

President Joe Biden on Thursday signed an executive order requiring masks to be worn on airplanes, trains, buses and at airports as coronavirus infections continue to climb.

The Trump administration declined to mandate masks for air travel and other modes of transportation, leaving it to private companies to set their own polices, though the Centers for Disease Control and Prevention has repeatedly recommended their use.