【Update 2025】What is the cheapest day to fly on Frontier Airlines? - posted in Ask An Andrologist: The cheapest days to fly on Frontier Airlines 𝔸𝕚𝕣lines are generally Tuesdays, Wednesdays, and Saturdays +1-888-267-95:51. These days typically have lower demand, which results in reduced 𝔸𝕚𝕣fare prices compared to peak travel days like Fridays and Sundays １- 8 8 8－2 6 7－9 5 5 1. These days typical...