| Solothurn to Olympia Heights (Florida) | 4,839.68 mi (7,788.72 km) |
| Solothurn to Omaha (Nebraska) | 4,743.11 mi (7,633.30 km) |
| Solothurn to On Top of the World Designated Place (Florida) | 4,765.33 mi (7,669.05 km) |
| Solothurn to Onalaska (Wisconsin) | 4,439.40 mi (7,144.52 km) |
| Solothurn to Oneida (New York) | 3,865.18 mi (6,220.40 km) |
| Solothurn to Oneonta (New York) | 3,865.58 mi (6,221.05 km) |
| Solothurn to Ontario (California) | 5,874.08 mi (9,453.42 km) |
| Solothurn to Ontario (Oregon) | 5,285.90 mi (8,506.84 km) |
| Solothurn to Opa-locka (Florida) | 4,827.53 mi (7,769.16 km) |
| Solothurn to Opelika (Alabama) | 4,730.57 mi (7,613.11 km) |
| Solothurn to Opelousas (Louisiana) | 5,115.32 mi (8,232.32 km) |
| Solothurn to Orange (California) | 5,894.47 mi (9,486.23 km) |
| Solothurn to Orange (Texas) | 5,204.74 mi (8,376.22 km) |
| Solothurn to Orange City (Florida) | 4,729.44 mi (7,611.30 km) |
| Solothurn to Orangeburg (South Carolina) | 4,498.93 mi (7,240.33 km) |
