The sale is for domestic flights and has restrictions on seats, travel days and markets. Travel in the U.S. is valid from June 5 through Oct. 31.
Flights on the airline’s shortest routes are just $49, going up to $79, $99 or $149 for longer distances.
For $49, for example, one can fly from San Diego to San Francisco, Oakland, San Jose, Sacramento, Las Vegas, Tucson or Phoenix.
The sale ends May 18, and tickets are nonrefundable. See all the deals and restrictions here.