| Sunninghill to Olympia Heights (Florida) | 4,415.38 mi (7,105.87 km) |
| Sunninghill to Omaha (Nebraska) | 4,275.46 mi (6,880.69 km) |
| Sunninghill to On Top of the World Designated Place (Florida) | 4,328.40 mi (6,965.89 km) |
| Sunninghill to Onalaska (Wisconsin) | 3,972.04 mi (6,392.37 km) |
| Sunninghill to Oneida (New York) | 3,408.57 mi (5,485.56 km) |
| Sunninghill to Oneonta (New York) | 3,410.77 mi (5,489.10 km) |
| Sunninghill to Ontario (California) | 5,408.42 mi (8,704.01 km) |
| Sunninghill to Ontario (Oregon) | 4,827.04 mi (7,768.38 km) |
| Sunninghill to Opa-locka (Florida) | 4,402.96 mi (7,085.88 km) |
| Sunninghill to Opelika (Alabama) | 4,281.01 mi (6,889.61 km) |
| Sunninghill to Opelousas (Louisiana) | 4,659.94 mi (7,499.45 km) |
| Sunninghill to Orange (California) | 5,428.82 mi (8,736.85 km) |
| Sunninghill to Orange (Texas) | 4,747.83 mi (7,640.90 km) |
| Sunninghill to Orange City (Florida) | 4,294.93 mi (6,912.02 km) |
| Sunninghill to Orangeburg (South Carolina) | 4,054.81 mi (6,525.58 km) |
