| Spilimbergo to Olympia Heights (Florida) | 5,104.07 mi (8,214.21 km) |
| Spilimbergo to Omaha (Nebraska) | 4,985.76 mi (8,023.81 km) |
| Spilimbergo to On Top of the World Designated Place (Florida) | 5,028.47 mi (8,092.53 km) |
| Spilimbergo to Onalaska (Wisconsin) | 4,683.23 mi (7,536.92 km) |
| Spilimbergo to Oneida (New York) | 4,121.84 mi (6,633.46 km) |
| Spilimbergo to Oneonta (New York) | 4,123.22 mi (6,635.68 km) |
| Spilimbergo to Ontario (California) | 6,097.18 mi (9,812.46 km) |
| Spilimbergo to Ontario (Oregon) | 5,495.39 mi (8,843.98 km) |
| Spilimbergo to Opa-locka (Florida) | 5,091.90 mi (8,194.63 km) |
| Spilimbergo to Opelika (Alabama) | 4,990.59 mi (8,031.58 km) |
| Spilimbergo to Opelousas (Louisiana) | 5,372.82 mi (8,646.72 km) |
| Spilimbergo to Orange (California) | 6,117.51 mi (9,845.18 km) |
| Spilimbergo to Orange (Texas) | 5,461.37 mi (8,789.23 km) |
| Spilimbergo to Orange City (Florida) | 4,992.92 mi (8,035.34 km) |
| Spilimbergo to Orangeburg (South Carolina) | 4,760.56 mi (7,661.39 km) |
