Some other low cost carrier will be in the market soon. Hawaii is too important a destination for someone to not fill the void. Since ATA worked with South West in a code share deal and South West was making good money on the deal I’m sure they’re looking for another partner right now.
Saaaayyy... Wouldn’t a route to Hawaii be quite a coup for southwest? Then again, I love Southewest for hour-long flights; on an eight-hour flight, that bag of peanuts is gonna seem pretty skimpy. :^D