Glarus

Glarus, Switzerland has 4 aerodromes in Sprinkle's airport directory. Of the 4 entries listed here, 3 are classified GA — public and 1 Heliport. Across the same set, 3 carry a four-letter ICAO location indicator and 1 has neither on file. Named examples include Biäsche Heliport, Limmerenfirn Mountain Landing Site (LSYI) and Mollis Airfield (LSZM). Their names span 4 letter groups, from B to M, each reachable from the A–Z rail above.