10 Intra-California Routes The Boeing 737 Flies The Most

The Boeing 737 remains a workhorse for short-haul flights across California, with major carriers like Southwest Airlines, United Airlines, Alaska Airlines, American Airlines, and Delta Air Lines deploying various models, including the 737-700, -800, -900, 900ER, MAX 8, and MAX 9. There will be a total of 2,935 intra-state flights operated on the Boeing 737 this month. Based on data from Cirium for May 2025, here are the top 10 intra-California routes ranked by total roundtrip flights.