Delta, JetBlue, United Airlines require face coverings on flights starting Monday
Beginning today, masks will be required on some major airlines.
Delta, Jetblue and United Airlines will require face coverings when boarding all flights.
Many of the airlines are also blocking some middle seats, so passengers aren't sitting close to each other.
Travelers can also expect to see plastic partitions at check-in counters and more cleaning crews.
Mask requirements for Southwest and American Airlines start next Monday.