Based on the needs you posted, Frontier.
You make it clear commuting is an issue for you.
New hires are holding MCO on a 320. Not something else.
How long to hold A320 Capt in MCO at F9 vs B6?
Pay is not that far off. Last year of F9s contract max pay is $270 on a 75hr guarantee.
Plus if you are in the mood to work extra anything over 82hr credit is at 1.25.
B6 does have some better perks in their contract. That’s only going to hold for the current contract. Next one F9 will close the gap.
Want seniority? How about 200 additional firm acft deliveries?