I realize this is a few months old, but I have to respond to your disingenuous and misleading comments.
To my knowledge, Southwest has never had a passenger fatality as a result of a crash or any other accident or incident for which they were directly responsible. They have had very, very few accidents or serious incidents compared with other major airlines, especially given the frequency of their operations. Their safety record is head and shoulders above every other major domestic carrier, as is their financial performance and, from what I can tell, their labor and customer relations track record is substantially better as well.
The lack of accidents doesn't mean the presence of safety, but the lack of accidents over a 40+ year history doesn't happen by chance. A culture of safety breeds a history of it, as Southwest has aptly demonstrated.
JKG