FILE PHOTO: Airline passengers check in at the Southwest Airlines desk at the Tampa International Airport

 Airline passengers check in at the Southwest Airlines desk at the Tampa International Airport January 19, 2022. 

Southwest Airlines Co on Tuesday launched a limited fare sale for select one-way routes, days after the carrier's massive flight disruptions in December.

The airline said it will offer the fares starting at $49 for certain one-way routes, with travelers required to make the purchase 21 days in advance.