WVAS 90.7 Montgomery, Alabama
WXTS Toledo, run by the high school. WAER Syracuse, Syracuse University. KUNV Las Vegas, UNLV. Jazz 91, 91.5 Toronto; commercial and actually outstanding IMO. +1 for Orlando and New Orleans - excellent stations. All of them available online, too. Good jazz stations are there if you take the time to look.
KUVO, in Denver is one of the best out there.
They sound excellent over the web.
Google ’jazz radio stations’, you’ll find a killer jazz station in Japan and another fantastic station in France. There are several jazz stations in other foreign countries that are outstanding.
101rujazz in Russia is also an excellent station.
Over 500 jazz stations listed in the link below: