Southwest Airlines: One-way flights . As low as $49

Now through May 18th, Southwest Airlines is offering flights for as low as $49 each way.

Tickets are nonrefundable and a 21-day advance purchase is required. Discounted travel for the continental US is valid June 5th through October 31st, 2018 and only on Tuesdays and Wednesdays. Travel for San Juan, Puerto Rico is valid Monday – Thursday.