| Dupnitsa to Olympia Heights (Florida) | 5,675.29 mi (9,133.50 km) |
| Dupnitsa to Omaha (Nebraska) | 5,532.42 mi (8,903.57 km) |
| Dupnitsa to On Top of the World Designated Place (Florida) | 5,600.75 mi (9,013.54 km) |
| Dupnitsa to Onalaska (Wisconsin) | 5,232.17 mi (8,420.36 km) |
| Dupnitsa to Oneida (New York) | 4,688.86 mi (7,545.99 km) |
| Dupnitsa to Oneonta (New York) | 4,691.32 mi (7,549.95 km) |
| Dupnitsa to Ontario (California) | 6,607.95 mi (10,634.47 km) |
| Dupnitsa to Ontario (Oregon) | 5,983.76 mi (9,629.93 km) |
| Dupnitsa to Opa-locka (Florida) | 5,663.17 mi (9,113.99 km) |
| Dupnitsa to Opelika (Alabama) | 5,560.92 mi (8,949.43 km) |
| Dupnitsa to Opelousas (Louisiana) | 5,940.34 mi (9,560.06 km) |
| Dupnitsa to Orange (California) | 6,628.12 mi (10,666.92 km) |
| Dupnitsa to Orange (Texas) | 6,027.79 mi (9,700.80 km) |
| Dupnitsa to Orange City (Florida) | 5,565.19 mi (8,956.31 km) |
| Dupnitsa to Orangeburg (South Carolina) | 5,332.23 mi (8,581.39 km) |
