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

Frontier Airlines has just cut prices on a healthy selection of domestic routes — 70 in total. The airline is advertising round-trip fares from $98.

These are the rules:

– You can fly August 19 through December 10.

– Tuesday, Wednesday and Saturday flights only.

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

– Book flights by 11:59pm ET June 26.

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