| Spennymoor to Olympia Heights (Florida) | 4,344.81 mi (6,992.29 km) |
| Spennymoor to Omaha (Nebraska) | 4,125.21 mi (6,638.89 km) |
| Spennymoor to On Top of the World Designated Place (Florida) | 4,242.70 mi (6,827.96 km) |
| Spennymoor to Onalaska (Wisconsin) | 3,824.27 mi (6,154.57 km) |
| Spennymoor to Oneida (New York) | 3,294.55 mi (5,302.06 km) |
| Spennymoor to Oneonta (New York) | 3,300.32 mi (5,311.35 km) |
| Spennymoor to Ontario (California) | 5,231.14 mi (8,418.71 km) |
| Spennymoor to Ontario (Oregon) | 4,636.38 mi (7,461.53 km) |
| Spennymoor to Opa-locka (Florida) | 4,332.13 mi (6,971.90 km) |
| Spennymoor to Opelika (Alabama) | 4,177.09 mi (6,722.37 km) |
| Spennymoor to Opelousas (Louisiana) | 4,544.88 mi (7,314.28 km) |
| Spennymoor to Orange (California) | 5,251.50 mi (8,451.47 km) |
| Spennymoor to Orange (Texas) | 4,629.61 mi (7,450.63 km) |
| Spennymoor to Orange City (Florida) | 4,212.47 mi (6,779.32 km) |
| Spennymoor to Orangeburg (South Carolina) | 3,960.02 mi (6,373.03 km) |
