What Are Southwest Airlines’ Oldest Active Aircraft?

Southwest Airlines is the fourth-largest airline in the world by fleet size. Moreover, it achieves this with an all-Boeing 737 fleet. Today, it has a fleet of 821 Boeing 737-700, 737-800, and 737 MAX 8 aircraft, with an overall average age of 8.3 years old. This (and all fleet data in this article) is based on data from ch-aviation.