Shortest commercial jet routes in the US: A closer look

For routes under 70 miles, there are two notable ones: Chicago O'Hare to Milwaukee Mitchell International Airport and San Juan (Puerto Rico) to Cyril E. King Airport (US Virgin Islands). The Chicago-Milwaukee route is served by Alaska Airlines and United Airlines using Bombardier CRJ regional jets and Embraer E-Jets. Meanwhile, JetBlue primarily serves the San Juan-US Virgin Islands route with Airbus A320s.

Between 70 and 75 miles, JetBlue flies from Boston Logan to Martha's Vineyard using Embraer 190 aircraft daily. United and Southwest serve Denver to Colorado Springs with multiple flights using regional and narrowbody aircraft.

Other notable short-haul flights include American Airlines' Charlotte Douglas to Greenville–Spartanburg route at 76 miles and Delta's Minneapolis–Saint Paul to Rochester route at the same distance.

Short-haul flights are common across water barriers such as Hawaiian islands or Alaskan regions without road access. However, some short routes exist despite well-developed road infrastructure like Denver to Colorado Springs.

Alaska Airlines has been highlighted for operating both long average domestic flights at an average distance of 934 miles while also managing ultra-short routes within Alaska.

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