If you’re looking to take a last-minute getaway on the cheap, Frontier has a sale for you.

The budget airline is having a flash sale on flights to U.S. cities like New Orleans and Austin, with fares starting at $20 one-way depending on the departure city.

You could save on flights to get some sun in Palm Springs, check out the breweries in Grand Rapids, take a break in Denver, or take the family to Orlando.

Travel dates for the sale are from April 14 to May 16. Flights need to be booked by April 9, but the airline’s recent announcement that it will be launching 109 new routes (starting at $29 one-way) means you can expect more cheap domestic flights in the future.

Frontier is a budget airline, meaning checked baggage and advanced seat assignment are not included in these super cheap fares. Get more info on Frontier's baggage fees, or use the airline's bundling tool to see what you'll pay to for the services you want.

If a domestic vacation isn't exciting enough, check out fares to Australia, which have fallen as low as $717 round-trip as Qantas and Virgin Australia try to undercut each other.