Southwest Airlines will be adding 20 more Boeing 737-800s to its fleet by 2012. Further strength of the fleet will also be increased by 2013 and 2014. The new 737-800s are quite larger than the exciting 737-300s, 737-500s and 737-700s.

Southwest Airlines current fleet constitutes 737-300s, 737-500s and 737-700s, making a total of 544 aircraft. The new 737-800 aircraft will be used for domestic fleet first and then gradually be used for the beyond connecting destinations that include Alaska, Canada, Caribbean, Central America and Mexico.

Though 737-800, will add 38 more seats per aircraft but the Southwest’s single-cabin configuration will remain unchanged.