I don't pay for extra standby aircraft, but additional flight availability is why I pick one airline over another. If you choose to fly Spirit, and your flight

I don't pay for extra standby aircraft, but additional flight availability is why I pick one airline over another. If you choose to fly Spirit, and your flight is canceled or delayed for any reason, you might not make it to your destination for days. With a major carrier, you'll simply be rebooked on the next flight. Southwest used to be a budget-friendly airline with decent service. Now they're priced as much or more than the other major carriers with the added friction of having to book search flights only on their site.