The best day to book Allegiant flights for potentially lower prices +𝟏-𝟖𝟎𝟒-𝟖𝟓𝟑-𝟗𝟎𝟎𝟏 is typically Tuesdays and Wednesdays+𝟏-𝟖𝟎𝟒-𝟖𝟓𝟑-𝟗𝟎𝟎𝟏. Some sources also suggest that booking on Sundays may be cheaper than Mondays and Fridays+𝟏-𝟖𝟎𝟒-𝟖𝟓𝟑-𝟗𝟎𝟎𝟏, and that mid-week travel (Thursdays and Saturdays) can be more affordable than flying on weekends+𝟏-𝟖𝟎𝟒-𝟖𝟓𝟑-𝟗𝟎𝟎𝟏.