Southwest Airlines expects to cancel about 100 flights from its Monday schedule, the airline said.
A Boeing 737 in the airline's fleet made an emergency landing in Arizona after a hole opened on top of the aircraft during flight Friday.
As a result, the airline is inspecting other planes. It has found "small, subsurface cracks" or indications of cracks in three other aircraft.
It canceled approximately 300 flights on Saturday and 300 flights on Sunday in order to conduct the inspections, Southwest said.
The airline asked customers to check its website before heading to the airport.