| Acronym | Definition |
|---|
| FLG | Flagstaff (Amtrak station code; Flagstaff, AZ) |
| FLG | Flag |
| FLG | Flying |
| FLG | Fedde Le Grand (DJ website) |
| FLG | Flange |
| FLG | Fédération Luxembourgeoise de Golf (French: Luxembourg Federation of Golf; Luxembourg) |
| FLG | Flashing (aviation) |
| FLG | Falun Gong (belief system; aka Falun Dafa) |
| FLG | Flaming Lotus Girls (San Francisco fire arts group) |
| FLG | Forward Logistics Group |
| FLG | FMS-Like Gene |
| FLG | Festival Littérature Génèse (French: Genesis Literature Festival) |
| FLG | Flagstaff, AZ, USA - Flagstaff (Airport Code) |
| FLG | Finger Licking Good |
| FLG | Fancy Lads Gaming (gaming clan) |
| FLG | Focused Learning Goals (charter schools) |
| FLG | Friendly Local Gunsmith |
| FLG | Frontline Gaming Community |
| FLG | Family Life Group |
| FLG | Final Layer Grinding |
| FLG | Finger Lakes Group (Civil Air Patrol) |
| FLG | Food, Liquor and Grocery (Australia) |