For you cross country travelers
If you click on the flight number on SWA website, it will tell you which series of 737 that flight uses and capacity. From Columbus to Vegas, SWA uses 737-700 and 737-800. The 700 series holds 143 and the 800 holds 175. The 800 is longer and has much more room between seats. It's so much better that we align our travel dates so we can be on the 800, particularly out as it's a 1 hr longer flight.