The average flight time between Los Angeles and San Francisco is one hour and 19 minutes. Some of these airlines offer cheap flights as part of their strategy to attract more passengers with the cheapest return flight costing about $92. Some of the airlines serving the route include American Airlines, Delta, United, United Express, and Virgin America. The air route is served by more than 420 flights per week with five airlines flying direct from Los Angeles to San Francisco. The 337-mile stretch between Los Angeles and San Francisco forms one of the United States’ busiest air routes. With four million passengers commuting the Chicago to New York route, it was the busiest air route in the US between September 2014 and August 2015. With a flight time of only two hours, there are several airlines serving the route including Delta, Spirit, Southwest, and American Airline. Chicago O’Hare International Airport connects daily to JFK International Airport in New York. The Chicago to New York air route connects two of the most populated cities in the US with high demand for air travel. Both cities house numerous airports for both domestic and international flight paths. Air Routes Chicago to New York Air RouteĬhicago and New York are among the busiest travel hubs in the United States. These are some of the busiest air routes in the US. The air routes are served by some of the country’s major airlines that offer scheduled direct flights on daily basis. Busiest air routes in the US are air routes that connect two big cities that are significantly far from each other like Los Angeles and New York. The country has an extensive air transportation network with cities connected to each other by different air routes which serve millions of passengers annually. Due to the long distances between major cities and the geography of the US, air transportation is the most popular and preferred mode of transportation for trips over 300 miles.