Southwest's 15 Shortest Routes in 2026 (simpleflying.com)

Southwest Airlines' shortest route this year is Denver to Colorado Springs at 63 nautical miles (117 km), with three daily flights, and 96% of its passengers connecting in Denver. Two new intrastate routes launched March 5, 2026, Phoenix to Tucson and Nashville to Knoxville, both at two daily flights, with first-quarter load factors of 66.9% and 76.2%. The carrier's 159 daily services under 175 nautical miles are its most in 18 years.