| Willimantic to Oerlinghausen | 3,685.48 mi (5,931.21 km) |
| Willimantic to Oestrich-Winkel | 3,713.62 mi (5,976.49 km) |
| Willimantic to Offenburg | 3,755.13 mi (6,043.30 km) |
| Willimantic to Oftersheim | 3,755.47 mi (6,043.85 km) |
| Willimantic to Ohrdruf | 3,799.00 mi (6,113.90 km) |
| Willimantic to Ohringen | 3,797.81 mi (6,111.98 km) |
| Willimantic to Olbernhau | 3,906.03 mi (6,286.14 km) |
| Willimantic to Olching | 3,902.72 mi (6,280.82 km) |
| Willimantic to Oldenburg | 3,636.53 mi (5,852.43 km) |
| Willimantic to Oldenburg in Holstein | 3,706.58 mi (5,965.16 km) |
| Willimantic to Olfen | 3,641.77 mi (5,860.87 km) |
| Willimantic to Olpe | 3,678.56 mi (5,920.07 km) |
| Willimantic to Olsberg | 3,695.20 mi (5,946.85 km) |
| Willimantic to Oranienburg | 3,838.62 mi (6,177.67 km) |
| Willimantic to Ortenberg | 3,746.00 mi (6,028.60 km) |
