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: {{lang|fr|Front de Liberation Libanais}})

• Philip Roth (disambiguation)
• Philip Rubens
• Philip Rucker
• Philip Ryan
• Philip Ryan (hurler)
• Philip Ryan (priest)
• Philip Rycroft
• Philips 2IA60
• Philips 2.IA60
• Philips 2NOR60
• Philips 2NOR61
• Philips 2SF60
• Philips 2TG90
• Philips 4NOR60
• Philip Sales
• Philip Sallon
• Philip Salt
• Philip Samuel Jacobson
• Philips Andover Academy
• Philip Sandys Melvill
• Philip Sankey
• Philip's Arctic
• Philips Arena
• Philip Sartwell
• Philip Satterthwaite