LUV is a high quality airline, but has lost market share due to the 737 MAX debacle. They were supposed to be flying 100 MAX's by now. Instead they're grounded and so they've had to shrink route coverage that other airlines like DAL, which has no MAX's, have snapped up ....
AAL is lower quality, but good for option writers since the premiums are so high. I hedge all my shares are each week, which is like a HUGE 5%+ weekly dividend, nice compensation for taking on exposure. Bankruptcy is highly unlikely anytime soon. The Bonds are all currently trading at a premium to par, so debt rollovers will be easy. They also don't hedge jet fuel prices, so will benefit significantly from the sharp drop in prices this quarter.
SAVE is my favorite and I continue to accumulate a sizable position.