If you've got a flight booked any time soon you might want to double or triple check the booking!
United Airlines CEO Scott Kirby said 3,000 U.S. employees have tested positive for coronavirus and are currently out of work.
That is forcing a bunch of flight cancellations because of staff shortages.
On Tuesday, 149 United flights were cancelled.
JetBlue and Alaska have also cut flights due to an unprecedented number of sick calls.
Southwest Airlines' pilots union confirmed it had 600 pilots out in one day earlier this month.
Have you had a recent travel nightmare because of flight cancellations?
You can keep an eye on your flight here!