Originally Posted by
beyondhere
One route that I'd love to see Spirit or Frontier take on is PHX-LAS. For such a short route, Southwest charges near $100 fares for their lowest advance purchase. I'd guess Spirit or Frontier could offer below $50 fares as a baseline.
FYI: Allegiant does exactly this, at often that pricepoint, but from Phoenix-Mesa instead of PHX-SkyHarbor.