Do you live near an airport that has mainline jets that are regularly scheduled? I live near the Manchester-Boston Regional Airport, where Delta and Southwest are the only airlines to offer mainline.
Oh. Its odd how our airport is now getting mainline. Though, Delta usually reverts back to their CRJ’s usually mid day. United strictly uses both the ERJ’s and DHB-8 on their routes. American also doesn’t fly Mainline to MHT.