Airlines did not qualify for PPP loans. They did receive substantial direct support from the federal government however. PPP "loans" were reserved for businesses with less than five hundred employees that weren't worth very much (relatively speaking) either.
Probably. All told the government basically covered 18 months of airline payroll expenses but the airlines had to pay about 25% of that back. PPP "loans" were intended as payroll support for a shorter period with 100% forgiveness in most cases.