| Gabon Airlines | GY | GBK | 013 |
| Gabon Airlines Cargo | 6G | 661 | |
| Galaxy Airlines | J7 | GXY | |
| Gama Aviation | GMA | ||
| Gambia International Airlines | GC | GNR | 034 |
| Gambia International Airways | GAW | 866 | |
| Gandalf Airlines | G7 | GNF | |
| Garuda Indonesia | GA | GIA | 126 |
| GAS Air Nigeria | NGS | ||
| GATS Gulf Aviation Technical & Services | |||
| Gazpromavia Aviation Company | OC | GZP | |
| GB Airways | GT | GBL | 171 |
| Gemini Air Cargo | GR | GCO | 358 |
| Gemini Airlines | GP | GAL | |
| Georgia Air | GEA | ||
| Georgian Airlines | 3P | GEG | 684 |
| Georgian Airlines | A9 | TGZ | 606 |
| Germania Fluggesellschaft | ST | GMI | |
| Germanwings | 4U | GWI | |
| Ghana Airways | GH | GHA | 237 |
| Gill Airways | 9C | GIL | 786 |
| Girjet | 8K | GJT | |
| Global Aviation | GAZ | ||
| Global Aviation and Services | |||
| Global Georgian Airways | GGZ | ||
| Global Supply Systems | GSS | ||
| GlobalApexAir | 300 | ||
| GMG Airlines | Z5 | GMG | 009 |
| GO | GO | GOE | 333 |
| GoAir | G8 | GOW | |
| GOL Transportes Aeros | G9 | GLO | |
| Golden Air Flyg | DC | GAO | |
| Golden Star Air Cargo | GLD | ||
| Gosnii | ISP | ||
| Grand Aire Express | GAE | ||
| Grand International Airways Inc | 8L | GDI | |
| Great American Airways | GRA | ||
| Great China Airlines | IF | GCA | |
| Great Lakes Aviation Ltd | ZK | GLA | 846 |
| Great Wall Airlines | IJ | GWL | 989 |
| Greece Airways | GRE | ||
| Grizodubova Air Company | GZD | ||
| Gromov Air | 3R | GAI | |
| GTI Airlines | GTK | ||
| Guinea Airlines | G7 | GIF | |
| Guizhou Airlines | CZ | CGH | |
| Gujurat Airways | G8 | GUJ | |
| Gulf Air | GF | GFA | 072 |
| Gulf Pearl Airline | |||
| Gulfstream International Airlines | 3M | GFT | 449 |
| Guyana Airways | GY | GYA |