Posted inDomestic Flights Top 10 Busiest Domestic Flight Routes in the US Posted by By Roger J. Perry March 30, 2025Posted inDomestic Flights Discover the top 10 busiest domestic flight routes in the United States, from LAX-SFO to DEN-ORD. Find airlines & flight details for Oct 2024. Roger J. Perry View All Posts Post navigation Previous Post Hawaii Airfare Wars Ignited: American’s 1st Class Deal Marks StartNext PostHow to Find the Best Deals on Flights