| Tromso to Olympia Heights (Florida) | 4,775.01 mi (7,684.64 km) |
| Tromso to Omaha (Nebraska) | 4,108.04 mi (6,611.24 km) |
| Tromso to On Top of the World Designated Place (Florida) | 4,601.89 mi (7,406.03 km) |
| Tromso to Onalaska (Wisconsin) | 3,846.60 mi (6,190.51 km) |
| Tromso to Oneida (New York) | 3,570.38 mi (5,745.96 km) |
| Tromso to Oneonta (New York) | 3,595.65 mi (5,786.64 km) |
| Tromso to Ontario (California) | 4,945.37 mi (7,958.80 km) |
| Tromso to Ontario (Oregon) | 4,270.63 mi (6,872.92 km) |
| Tromso to Opa-locka (Florida) | 4,761.81 mi (7,663.39 km) |
| Tromso to Opelika (Alabama) | 4,442.10 mi (7,148.87 km) |
| Tromso to Opelousas (Louisiana) | 4,722.20 mi (7,599.65 km) |
| Tromso to Orange (California) | 4,964.22 mi (7,989.14 km) |
| Tromso to Orange (Texas) | 4,782.92 mi (7,697.36 km) |
| Tromso to Orange City (Florida) | 4,590.42 mi (7,387.57 km) |
| Tromso to Orangeburg (South Carolina) | 4,289.64 mi (6,903.52 km) |
