Whether Southwest is "the best" depends entirely on your travel priorities. In 2026, Southwest remains the "best" for flexibility and hidden value, as it is the only major U.S. airline that still allows two free checked bags on most fare classes (though they introduced a "Basic" fare in 2025 with stricter rules). Their "no change fees" policy is industry-leading. However, Southwest underwent a massive identity shift in early 2026 by ending its famous "open seating" policy. They now offer assigned seating and "extra legroom" sections to compete with Delta and United. For travelers who hated the "boarding group" lottery, Southwest is now much better. However, for those who want a true First Class cabin, hot meals, or a massive international network, Southwest will never be "the best" because they fly an all-Boeing 737 fleet primarily within North America. It is a premium low-cost carrier: you get great service and no-frills reliability, but you won't get a lie-flat seat or a glass of champagne in a crystal flute.