| Trondheim to Oswego (Illinois) | 3,940.98 mi (6,342.40 km) |
| Trondheim to Oswego (New York) | 3,506.50 mi (5,643.17 km) |
| Trondheim to Otsego (Minnesota) | 3,869.55 mi (6,227.45 km) |
| Trondheim to Ottawa (Illinois) | 3,973.55 mi (6,394.80 km) |
| Trondheim to Ottawa (Kansas) | 4,309.87 mi (6,936.07 km) |
| Trondheim to Ottumwa (Iowa) | 4,089.77 mi (6,581.84 km) |
| Trondheim to Overland (Missouri) | 4,173.07 mi (6,715.91 km) |
| Trondheim to Overland Park (Kansas) | 4,277.38 mi (6,883.78 km) |
| Trondheim to Overlea (Maryland) | 3,740.26 mi (6,019.37 km) |
| Trondheim to Oviedo (Florida) | 4,510.76 mi (7,259.36 km) |
| Trondheim to Owasso (Oklahoma) | 4,464.90 mi (7,185.56 km) |
| Trondheim to Owatonna (Minnesota) | 3,928.86 mi (6,322.90 km) |
| Trondheim to Owensboro (Kentucky) | 4,139.07 mi (6,661.18 km) |
| Trondheim to Owings Mills (Maryland) | 3,745.59 mi (6,027.95 km) |
| Trondheim to Owosso (Michigan) | 3,750.23 mi (6,035.42 km) |
