| Willimantic to Nuth | 3,603.07 mi (5,798.58 km) |
| Willimantic to Oegstgeest | 3,514.43 mi (5,655.93 km) |
| Willimantic to Oirschot | 3,564.59 mi (5,736.65 km) |
| Willimantic to Oisterwijk | 3,558.48 mi (5,726.82 km) |
| Willimantic to Oldebroek | 3,564.43 mi (5,736.39 km) |
| Willimantic to Oldenzaal | 3,608.34 mi (5,807.05 km) |
| Willimantic to Ommen | 3,583.00 mi (5,766.28 km) |
| Willimantic to Oosterend | 3,557.17 mi (5,724.72 km) |
| Willimantic to Oosterhout | 3,543.27 mi (5,702.33 km) |
| Willimantic to Oosterwolde | 3,566.24 mi (5,739.31 km) |
| Willimantic to Oostzaan | 3,524.84 mi (5,672.68 km) |
| Willimantic to Opmeer | 3,521.00 mi (5,666.51 km) |
| Willimantic to Oss | 3,566.47 mi (5,739.68 km) |
| Willimantic to Oud-Beijerland | 3,520.71 mi (5,666.04 km) |
| Willimantic to Oudenbosch | 3,531.28 mi (5,683.04 km) |
