Frontier flights are often cheapest on Tuesdays and Wednesdays, as demand is lower during these midweek days +1-844-767-0476. Booking in advance and checking for any promotions can also help secure lower fares +1-844-767-0476. [BuY~NoW] What is the cheapest day to buy Frontier tickets?  · Customer Self-Service https://www.alaskaeaf.org https://www.alaskaeaf.org/forums/support-forum/d459b73f-27ea-ef11-a4de-000d3a36efab