Late summer flight deals with Frontier — book by Thursday

Update: this popular deal may have sold out. See more deals >

Frontier is offering last-minute sale fares on 62 domestic routes, good for travel through September 21 only. They start at $118 round-trip. These are the rules:

– Sale fares are one-way only; round-trip purchase not required.

– Tuesday, Wednesday and Saturday flights only.

– 7-day advance purchase required.

– No travel August 29-30 and September 2.

– Book flights by 11:59pm ET July 25.

Search Cheap Flights for Late Summer

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