| Busko-Zdroj to Olympia Heights (Florida) | 5,320.84 mi (8,563.07 km) |
| Busko-Zdroj to Omaha (Nebraska) | 5,040.61 mi (8,112.07 km) |
| Busko-Zdroj to On Top of the World Designated Place (Florida) | 5,218.02 mi (8,397.59 km) |
| Busko-Zdroj to Onalaska (Wisconsin) | 4,746.11 mi (7,638.13 km) |
| Busko-Zdroj to Oneida (New York) | 4,258.53 mi (6,853.44 km) |
| Busko-Zdroj to Oneonta (New York) | 4,266.68 mi (6,866.55 km) |
| Busko-Zdroj to Ontario (California) | 6,068.90 mi (9,766.95 km) |
| Busko-Zdroj to Ontario (Oregon) | 5,431.23 mi (8,740.72 km) |
| Busko-Zdroj to Opa-locka (Florida) | 5,308.19 mi (8,542.70 km) |
| Busko-Zdroj to Opelika (Alabama) | 5,145.66 mi (8,281.14 km) |
| Busko-Zdroj to Opelousas (Louisiana) | 5,504.85 mi (8,859.20 km) |
| Busko-Zdroj to Orange (California) | 6,088.86 mi (9,799.08 km) |
| Busko-Zdroj to Orange (Texas) | 5,586.52 mi (8,990.64 km) |
| Busko-Zdroj to Orange City (Florida) | 5,188.32 mi (8,349.79 km) |
| Busko-Zdroj to Orangeburg (South Carolina) | 4,933.05 mi (7,938.97 km) |
