| Waltham to Oerlinghausen | 3,617.54 mi (5,821.87 km) |
| Waltham to Oestrich-Winkel | 3,645.88 mi (5,867.47 km) |
| Waltham to Offenburg | 3,687.61 mi (5,934.63 km) |
| Waltham to Oftersheim | 3,687.79 mi (5,934.92 km) |
| Waltham to Ohrdruf | 3,731.09 mi (6,004.62 km) |
| Waltham to Ohringen | 3,730.11 mi (6,003.03 km) |
| Waltham to Olbernhau | 3,838.08 mi (6,176.80 km) |
| Waltham to Olching | 3,835.07 mi (6,171.95 km) |
| Waltham to Oldenburg | 3,568.54 mi (5,743.01 km) |
| Waltham to Oldenburg in Holstein | 3,638.57 mi (5,855.71 km) |
| Waltham to Olfen | 3,573.87 mi (5,751.60 km) |
| Waltham to Olpe | 3,610.72 mi (5,810.88 km) |
| Waltham to Olsberg | 3,627.31 mi (5,837.59 km) |
| Waltham to Oranienburg | 3,770.61 mi (6,068.21 km) |
| Waltham to Ortenberg | 3,678.18 mi (5,919.47 km) |
