| Gaziantep to Orbetello | 1,432.44 mi (2,305.29 km) |
| Gaziantep to Oria | 1,087.24 mi (1,749.75 km) |
| Gaziantep to Oristano | 1,562.47 mi (2,514.55 km) |
| Gaziantep to Orta Nova | 1,193.63 mi (1,920.97 km) |
| Gaziantep to Orte | 1,373.20 mi (2,209.95 km) |
| Gaziantep to Ortona | 1,270.42 mi (2,044.54 km) |
| Gaziantep to Orvieto | 1,389.46 mi (2,236.12 km) |
| Gaziantep to Orzinuovi | 1,528.65 mi (2,460.13 km) |
| Gaziantep to Osimo | 1,329.93 mi (2,140.32 km) |
| Gaziantep to Ospitaletto | 1,524.39 mi (2,453.27 km) |
| Gaziantep to Ostuni | 1,091.71 mi (1,756.93 km) |
| Gaziantep to Ottaviano | 1,254.15 mi (2,018.35 km) |
| Gaziantep to Ovada | 1,580.48 mi (2,543.54 km) |
| Gaziantep to Ozieri | 1,539.87 mi (2,478.17 km) |
| Gaziantep to Paceco | 1,358.06 mi (2,185.58 km) |
