| Happy Valley to Oerlinghausen | 5,109.18 mi (8,222.42 km) |
| Happy Valley to Oestrich-Winkel | 5,206.65 mi (8,379.30 km) |
| Happy Valley to Offenburg | 5,293.46 mi (8,519.01 km) |
| Happy Valley to Oftersheim | 5,257.35 mi (8,460.89 km) |
| Happy Valley to Ohrdruf | 5,223.43 mi (8,406.29 km) |
| Happy Valley to Ohringen | 5,289.56 mi (8,512.73 km) |
| Happy Valley to Olbernhau | 5,291.56 mi (8,515.94 km) |
| Happy Valley to Olching | 5,391.93 mi (8,677.47 km) |
| Happy Valley to Oldenburg | 5,030.89 mi (8,096.44 km) |
| Happy Valley to Oldenburg in Holstein | 5,023.48 mi (8,084.50 km) |
| Happy Valley to Olfen | 5,093.12 mi (8,196.58 km) |
| Happy Valley to Olpe | 5,144.09 mi (8,278.61 km) |
| Happy Valley to Olsberg | 5,140.45 mi (8,272.75 km) |
| Happy Valley to Oranienburg | 5,164.97 mi (8,312.22 km) |
| Happy Valley to Ortenberg | 5,211.61 mi (8,387.28 km) |
