FLR may refer to:
- FLR, old IATA code for Fall River Municipal Airport, a defunct airport in Massachusetts, United States
- FLR, IATA code for Florence Airport, in Italy
- FLR, NYSE ticker symbol for Fluor Corporation, an American engineering and construction firm
- flr, ISO 639-3 code for the Fuliiru language, spoken in Congo
- Family Law Reports, a law report series for family law cases in the United Kingdom
- Family Life Radio, an American radio network
- Federal Law Reports, a series of Australian law reports
- Female-led relationship, a type of interpersonal relationship
- Fife Lake Railway, in Canada
- Forest landscape restoration, forest restoration intended to restore landscape appearance as well as ecology
- Fuzzy Logic Recordings, a Canadian record label
- [Fédération Luxembourgeoise de rugby] Error: {{Lang}}: invalid parameter: |label= (help) (Luxembourg Rugby Federation), Luxembourgeoise sports organization