short answer, most airlines can't make money flying to Hawaii. Jet fuel is too expensive. cheap ticket prices can't cover expenses. The small profit is made by cargo in the belly of huge airplanes. SWA doesn't have the cargo room, nor the inclination to have all frequent flier miles converted into Hawaii trips. Please look up America West one's bankruptcy, It would look much like that.
SWA can't comply with maintenence inspections, now, let alone ETOPS requirements.
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