FLZ or Flz can refer to:

Ferdinand Lumban Tobing Airport, an airport in Sibolga, Indonesia, by IATA code Flightlink, a regional airline based in Tanzania, by ICAO code Flutter-tonguing, a musical technique often denoted by "Flz." WFLZ-FM, a radio station in Tampa, Florida, U.S. branded as "93.3 FLZ"