SouthWest Airline Flights as low as $49 October 3, 2018 by SMFM Leave a Comment Don't Miss a deal! Sign up for our Daily Free Email HERE! Join us on Facebook HERE and our Facebook Group. Southwest Airlines is offering domestic flights for as low as $49 each way and international flights starting at only $99 each way! As just one idea, you can score a one-way flight from Los Angeles, CA to Phoenix, AZ for just $49!