Inside Southwest Airlines' Longest Flights In 2026

Southwest Airlines built its network on short domestic sectors, with an average flight length well under two hours and a fleet consisting entirely of Boeing 737s. According to Cirium schedule data, the six longest routes it operates are all Pacific crossings to Hawaii, and four of the five depart from just two mainland airports. Phoenix Sky Harbor (PHX) and Harry Reid International (LAS) account for every route in this ranking, serving Honolulu (HNL), Kahului (OGG), Lihue (LIH), and Kona (KOA).