| Pirot to Oswego (Illinois) | 5,176.08 mi (8,330.10 km) |
| Pirot to Oswego (New York) | 4,646.40 mi (7,477.66 km) |
| Pirot to Otsego (Minnesota) | 5,180.78 mi (8,337.66 km) |
| Pirot to Ottawa (Illinois) | 5,209.98 mi (8,384.65 km) |
| Pirot to Ottawa (Kansas) | 5,580.86 mi (8,981.53 km) |
| Pirot to Ottumwa (Iowa) | 5,355.60 mi (8,619.01 km) |
| Pirot to Overland (Missouri) | 5,398.88 mi (8,688.65 km) |
| Pirot to Overland Park (Kansas) | 5,545.50 mi (8,924.62 km) |
| Pirot to Overlea (Maryland) | 4,825.85 mi (7,766.46 km) |
| Pirot to Oviedo (Florida) | 5,519.61 mi (8,882.96 km) |
| Pirot to Owasso (Oklahoma) | 5,722.48 mi (9,209.44 km) |
| Pirot to Owatonna (Minnesota) | 5,227.51 mi (8,412.87 km) |
| Pirot to Owensboro (Kentucky) | 5,322.68 mi (8,566.03 km) |
| Pirot to Owings Mills (Maryland) | 4,834.97 mi (7,781.12 km) |
| Pirot to Owosso (Michigan) | 4,960.10 mi (7,982.52 km) |
