| Senec to Oswego (Illinois) | 4,756.53 mi (7,654.90 km) |
| Senec to Oswego (New York) | 4,236.67 mi (6,818.27 km) |
| Senec to Otsego (Minnesota) | 4,754.05 mi (7,650.90 km) |
| Senec to Ottawa (Illinois) | 4,790.37 mi (7,709.35 km) |
| Senec to Ottawa (Kansas) | 5,158.37 mi (8,301.60 km) |
| Senec to Ottumwa (Iowa) | 4,933.19 mi (7,939.21 km) |
| Senec to Overland (Missouri) | 4,980.98 mi (8,016.12 km) |
| Senec to Overland Park (Kansas) | 5,123.23 mi (8,245.04 km) |
| Senec to Overlea (Maryland) | 4,424.64 mi (7,120.77 km) |
| Senec to Oviedo (Florida) | 5,134.76 mi (8,263.60 km) |
| Senec to Owasso (Oklahoma) | 5,301.71 mi (8,532.27 km) |
| Senec to Owatonna (Minnesota) | 4,801.84 mi (7,727.81 km) |
| Senec to Owensboro (Kentucky) | 4,909.84 mi (7,901.62 km) |
| Senec to Owings Mills (Maryland) | 4,433.24 mi (7,134.61 km) |
| Senec to Owosso (Michigan) | 4,542.83 mi (7,310.97 km) |
