At least 800 more flights were cancelled by US airlines on Monday due to rising coronavirus cases of the Omicron variant, said a foreign media outlet.
Shares of American Airlines Group, United Airlines Holdings Inc, Delta Air Line Inc and Southwest Airlines were down between 2% and 3% in trading.
According to FlightAware.com, nearly 740 flights were canceled within, into, or out of the United States by early Monday morning.
It is unfortunate how airlines have been forced to cancel flights because of rising infections. The top four airlines did not immediately respond to requests for comment.
On the other hand, at least three cruise ships were forced to return to port after Covid cases were detected on board.
Cruise operators Norwegian Cruise Line Holdings, Royal Caribbean Cruises Ltd and Carnival Corp were also down between 1.3% and 2.4%.
