RouteLinq

RouteLinq is independent airline route intelligence built for two kinds of people: travelers who want the route data booking sites won't show you, and aviation enthusiasts who want to go deep on the airlines and routes they care about.
Search 8,000+ nonstop flight routes across 534 airports and 55 airlines major U.S. carriers, U.S. regional airlines, and major European flag carriers. See which routes are stable, which are undersupplied, and which airlines are expanding or quietly cutting service. No tracking. No booking pressure. No affiliate links. Just routes.