| Opovo to Olympia Heights (Florida) | 5,468.62 mi (8,800.90 km) |
| Opovo to Omaha (Nebraska) | 5,299.84 mi (8,529.27 km) |
| Opovo to On Top of the World Designated Place (Florida) | 5,387.36 mi (8,670.11 km) |
| Opovo to Onalaska (Wisconsin) | 5,000.12 mi (8,046.92 km) |
| Opovo to Oneida (New York) | 4,464.86 mi (7,185.50 km) |
| Opovo to Oneonta (New York) | 4,468.37 mi (7,191.14 km) |
| Opovo to Ontario (California) | 6,373.34 mi (10,256.90 km) |
| Opovo to Ontario (Oregon) | 5,750.49 mi (9,254.51 km) |
| Opovo to Opa-locka (Florida) | 5,456.36 mi (8,781.16 km) |
| Opovo to Opelika (Alabama) | 5,340.54 mi (8,594.77 km) |
| Opovo to Opelousas (Louisiana) | 5,716.36 mi (9,199.60 km) |
| Opovo to Orange (California) | 6,393.52 mi (10,289.37 km) |
| Opovo to Orange (Texas) | 5,802.82 mi (9,338.74 km) |
| Opovo to Orange City (Florida) | 5,353.09 mi (8,614.96 km) |
| Opovo to Orangeburg (South Carolina) | 5,114.95 mi (8,231.72 km) |
