| Karlstad to Orbetello | 1,174.44 mi (1,890.08 km) |
| Karlstad to Oria | 1,316.61 mi (2,118.88 km) |
| Karlstad to Oristano | 1,362.36 mi (2,192.51 km) |
| Karlstad to Orta Nova | 1,250.58 mi (2,012.62 km) |
| Karlstad to Orte | 1,169.89 mi (1,882.76 km) |
| Karlstad to Ortona | 1,177.16 mi (1,894.46 km) |
| Karlstad to Orvieto | 1,152.62 mi (1,854.97 km) |
| Karlstad to Orzinuovi | 977.12 mi (1,572.53 km) |
| Karlstad to Osimo | 1,098.24 mi (1,767.44 km) |
| Karlstad to Ospitaletto | 965.61 mi (1,554.00 km) |
| Karlstad to Ostuni | 1,300.30 mi (2,092.63 km) |
| Karlstad to Ottaviano | 1,280.87 mi (2,061.37 km) |
| Karlstad to Ovada | 1,038.44 mi (1,671.20 km) |
| Karlstad to Ozieri | 1,313.08 mi (2,113.20 km) |
| Karlstad to Paceco | 1,478.86 mi (2,379.99 km) |
