| Trumbull Center to Oerlinghausen | 3,745.03 mi (6,027.04 km) |
| Trumbull Center to Oestrich-Winkel | 3,773.46 mi (6,072.79 km) |
| Trumbull Center to Offenburg | 3,815.11 mi (6,139.83 km) |
| Trumbull Center to Oftersheim | 3,815.36 mi (6,140.22 km) |
| Trumbull Center to Ohrdruf | 3,858.63 mi (6,209.86 km) |
| Trumbull Center to Ohringen | 3,857.68 mi (6,208.34 km) |
| Trumbull Center to Olbernhau | 3,965.56 mi (6,381.95 km) |
| Trumbull Center to Olching | 3,962.63 mi (6,377.24 km) |
| Trumbull Center to Oldenburg | 3,695.89 mi (5,947.96 km) |
| Trumbull Center to Oldenburg in Holstein | 3,765.55 mi (6,060.07 km) |
| Trumbull Center to Olfen | 3,701.41 mi (5,956.84 km) |
| Trumbull Center to Olpe | 3,738.28 mi (6,016.18 km) |
| Trumbull Center to Olsberg | 3,754.85 mi (6,042.85 km) |
| Trumbull Center to Oranienburg | 3,897.79 mi (6,272.89 km) |
| Trumbull Center to Ortenberg | 3,805.76 mi (6,124.78 km) |
