| Sannicolau Mare to Oswego (Illinois) | 4,968.10 mi (7,995.39 km) |
| Sannicolau Mare to Oswego (New York) | 4,446.13 mi (7,155.36 km) |
| Sannicolau Mare to Otsego (Minnesota) | 4,965.98 mi (7,991.98 km) |
| Sannicolau Mare to Ottawa (Illinois) | 5,001.95 mi (8,049.86 km) |
| Sannicolau Mare to Ottawa (Kansas) | 5,370.30 mi (8,642.67 km) |
| Sannicolau Mare to Ottumwa (Iowa) | 5,145.11 mi (8,280.26 km) |
| Sannicolau Mare to Overland (Missouri) | 5,192.29 mi (8,356.19 km) |
| Sannicolau Mare to Overland Park (Kansas) | 5,335.14 mi (8,586.08 km) |
| Sannicolau Mare to Overlea (Maryland) | 4,631.77 mi (7,454.12 km) |
| Sannicolau Mare to Oviedo (Florida) | 5,336.86 mi (8,588.85 km) |
| Sannicolau Mare to Owasso (Oklahoma) | 5,513.46 mi (8,873.06 km) |
| Sannicolau Mare to Owatonna (Minnesota) | 5,013.86 mi (8,069.02 km) |
| Sannicolau Mare to Owensboro (Kentucky) | 5,120.12 mi (8,240.04 km) |
| Sannicolau Mare to Owings Mills (Maryland) | 4,640.53 mi (7,468.21 km) |
| Sannicolau Mare to Owosso (Michigan) | 4,754.00 mi (7,650.83 km) |
