| Tring to Oswego (Illinois) | 3,954.10 mi (6,363.50 km) |
| Tring to Oswego (New York) | 3,415.88 mi (5,497.33 km) |
| Tring to Otsego (Minnesota) | 3,980.16 mi (6,405.44 km) |
| Tring to Ottawa (Illinois) | 3,988.05 mi (6,418.14 km) |
| Tring to Ottawa (Kansas) | 4,364.16 mi (7,023.43 km) |
| Tring to Ottumwa (Iowa) | 4,139.12 mi (6,661.27 km) |
| Tring to Overland (Missouri) | 4,174.18 mi (6,717.69 km) |
| Tring to Overland Park (Kansas) | 4,328.31 mi (6,965.75 km) |
| Tring to Overlea (Maryland) | 3,595.05 mi (5,785.67 km) |
| Tring to Oviedo (Florida) | 4,298.57 mi (6,917.88 km) |
| Tring to Owasso (Oklahoma) | 4,501.88 mi (7,245.08 km) |
| Tring to Owatonna (Minnesota) | 4,021.77 mi (6,472.42 km) |
| Tring to Owensboro (Kentucky) | 4,093.38 mi (6,587.66 km) |
| Tring to Owings Mills (Maryland) | 3,604.05 mi (5,800.15 km) |
| Tring to Owosso (Michigan) | 3,735.10 mi (6,011.06 km) |
