Frontier Airlines is selling one-way tickets for as little as $25. Flights on Tuesdays and Wednesdays from July 3 through August 28 are eligible.
The sale runs through Wednesday, though the airline does not specify on its website whether the sale ends before or after 11:59 p.m. in certain time zones. There are also tickets available for $34, $39, and $44.
Hurry up, with prices like these, they won't be lasting long.