To celebrate more non-stop flights out of Dallas Love Field, double points are back with Southwest! Southwest regularly has double points promotions but you have to sign up first. To sign up, log in to your Southwest Rapid Rewards Account, go to My Account -> My Rapid Rewards and click the promotion “Double Points are twice as nice”. Click the Register button to sign up. You can also try this link (it will make you log in when you click it).
After that, just book any flight with travel between April 28, 2015 and July 31, 2015. The travel must be to or from the cities of Dallas or Austin. That doesn’t mean flights between Dallas and Austin. It just means that one of those cities has to be your departure location or destination.
This promotion may not be available to everyone so log in to your account and see.