| Upper Arlington to Oerlinghausen | 4,180.81 mi (6,728.36 km) |
| Upper Arlington to Oestrich-Winkel | 4,220.67 mi (6,792.52 km) |
| Upper Arlington to Offenburg | 4,269.97 mi (6,871.85 km) |
| Upper Arlington to Oftersheim | 4,264.76 mi (6,863.46 km) |
| Upper Arlington to Ohrdruf | 4,296.99 mi (6,915.34 km) |
| Upper Arlington to Ohringen | 4,306.39 mi (6,930.46 km) |
| Upper Arlington to Olbernhau | 4,400.11 mi (7,081.30 km) |
| Upper Arlington to Olching | 4,412.98 mi (7,102.00 km) |
| Upper Arlington to Oldenburg | 4,125.82 mi (6,639.87 km) |
| Upper Arlington to Oldenburg in Holstein | 4,184.42 mi (6,734.18 km) |
| Upper Arlington to Olfen | 4,140.62 mi (6,663.68 km) |
| Upper Arlington to Olpe | 4,180.51 mi (6,727.89 km) |
| Upper Arlington to Olsberg | 4,194.25 mi (6,750.00 km) |
| Upper Arlington to Oranienburg | 4,321.38 mi (6,954.60 km) |
| Upper Arlington to Ortenberg | 4,249.42 mi (6,838.78 km) |
