Carrier offers domestic fares starting as low as $49 and international fares as low as $99 one-way to select destinations June 05, 2018 DALLAS, June 5, 2018 /PRNewswire/ — Southwest Airlines Co. (NYSE: LUV) has launched a three-day sale offering low fares for fall travel, so book your next trip now! Customers may take advantage of available low domestic fares starting at $49, $79, $99...