FLL may refer to:
- FIRST Lego League, an international competition for elementary and middle school students
- Fort Lauderdale – Hollywood International Airport, in Florida, United States
- Four Letter Lie, an American post-hardcore band
- Frequency-locked loop
- Lebanese Liberation Front (French: Front de Liberation Libanais)
If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: