https://community.ring.com/conversations/ring-home-plan/frontierlowestfares-what-is-the-cheapest-day-to-buy-frontier-tickets/67e1318f4fef9155878c3ce1
https://community.ring.com/conversations/welcome-to-the-ring-community/frontierlowestfares-what-is-the-cheapest-day-to-buy-frontier-tickets/67e1316ae7cf820830f0d57d