Throwback: When Los Angeles-San Diego Was The USA’s Most Served Route

This article was written on February 1. Twenty years ago, in the first week of February 2004, Los Angeles International to San Diego was the USA's busiest route. Schedule analysis using Cirium data shows there were a whopping 274 departures each way that week – and that was not even a record. It was the country's busiest route for a while.