Southwest Airlines is the world’s largest low-cost carrier and a major US airline, headquartered in Dallas, Texas. Their fleet is huge — 746 aircrafts headed to nearly 100 destinations, mostly focused on domestic routes. Its loyalty program, Rapid Rewards, is among our favorites for families, particularly because of the valuable Companion Pass. We have some articles pinned below where you can learn more about that perk and tons of others, along with all of our flight reviews and news on Southwest Airlines.