These routes vary widely in normal cost, but they all average at more than $50 one way — if you book before midnight, you can book them all for $15 or $19. Most of the sale flights leave on Tuesdays and Thursdays and have pretty wide availability through November.
Frontier Sale Timeframe: 2. Sep. 2019 - 30. Nov. 2019
These are our favorite routes from the sale, they also work vice versa and all cost $15 or $19:
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