| Zalec to Oswego (Illinois) | 4,761.27 mi (7,662.53 km) |
| Zalec to Oswego (New York) | 4,226.37 mi (6,801.68 km) |
| Zalec to Otsego (Minnesota) | 4,775.57 mi (7,685.55 km) |
| Zalec to Ottawa (Illinois) | 4,795.20 mi (7,717.13 km) |
| Zalec to Ottawa (Kansas) | 5,168.74 mi (8,318.29 km) |
| Zalec to Ottumwa (Iowa) | 4,943.51 mi (7,955.82 km) |
| Zalec to Overland (Missouri) | 4,982.69 mi (8,018.86 km) |
| Zalec to Overland Park (Kansas) | 5,133.14 mi (8,260.99 km) |
| Zalec to Overlea (Maryland) | 4,403.86 mi (7,087.33 km) |
| Zalec to Oviedo (Florida) | 5,097.76 mi (8,204.04 km) |
| Zalec to Owasso (Oklahoma) | 5,308.49 mi (8,543.19 km) |
| Zalec to Owatonna (Minnesota) | 4,820.17 mi (7,757.31 km) |
| Zalec to Owensboro (Kentucky) | 4,903.66 mi (7,891.68 km) |
| Zalec to Owings Mills (Maryland) | 4,413.04 mi (7,102.10 km) |
| Zalec to Owosso (Michigan) | 4,543.68 mi (7,312.34 km) |
