| Tromso to Orbetello | 1,902.38 mi (3,061.58 km) |
| Tromso to Oria | 2,016.90 mi (3,245.88 km) |
| Tromso to Oristano | 2,091.69 mi (3,366.24 km) |
| Tromso to Orta Nova | 1,962.39 mi (3,158.16 km) |
| Tromso to Orte | 1,895.34 mi (3,050.26 km) |
| Tromso to Ortona | 1,895.45 mi (3,050.44 km) |
| Tromso to Orvieto | 1,878.82 mi (3,023.67 km) |
| Tromso to Orzinuovi | 1,706.50 mi (2,746.35 km) |
| Tromso to Osimo | 1,820.43 mi (2,929.70 km) |
| Tromso to Ospitaletto | 1,694.98 mi (2,727.81 km) |
| Tromso to Ostuni | 2,000.82 mi (3,220.01 km) |
| Tromso to Ottaviano | 1,998.69 mi (3,216.58 km) |
| Tromso to Ovada | 1,767.19 mi (2,844.01 km) |
| Tromso to Ozieri | 2,042.46 mi (3,287.02 km) |
| Tromso to Paceco | 2,203.01 mi (3,545.40 km) |
