| Tall Abyad to Orbetello | 1,522.47 mi (2,450.18 km) |
| Tall Abyad to Oria | 1,177.89 mi (1,895.63 km) |
| Tall Abyad to Oristano | 1,653.23 mi (2,660.62 km) |
| Tall Abyad to Orta Nova | 1,284.03 mi (2,066.45 km) |
| Tall Abyad to Orte | 1,463.16 mi (2,354.73 km) |
| Tall Abyad to Ortona | 1,360.32 mi (2,189.22 km) |
| Tall Abyad to Orvieto | 1,479.28 mi (2,380.67 km) |
| Tall Abyad to Orzinuovi | 1,616.45 mi (2,601.42 km) |
| Tall Abyad to Osimo | 1,419.05 mi (2,283.75 km) |
| Tall Abyad to Ospitaletto | 1,612.01 mi (2,594.27 km) |
| Tall Abyad to Ostuni | 1,182.28 mi (1,902.70 km) |
| Tall Abyad to Ottaviano | 1,344.76 mi (2,164.18 km) |
| Tall Abyad to Ovada | 1,669.14 mi (2,686.22 km) |
| Tall Abyad to Ozieri | 1,630.56 mi (2,624.14 km) |
| Tall Abyad to Paceco | 1,448.44 mi (2,331.04 km) |
