Originally Posted by
alanR
Most low costs don't like cancelling flights because of the knock-on effects - that plane that is going from A to B may then fly B to C then C to D before flying back to A - possibly by yet another airport.
That's the one saving grace...the business model might depend of flying the plane so much that there's a cascade effect. In the U.S., for example, Spirit is notorious for having tickets that aren't good elsewhere and generally being a bad place to be when things go wrong, but its business model counts in part of trying to cram in another flight per plane per day vs. what a legacy might demand. So even if they don't care much about you, it's costing THEM.
Grand Air in the Philippines also used to be really bad about economic cancellations. Their liability limits under Philippine law at the time were 150 pesos ($3-4), so that was hardly a deterrent.