| Merzifon to Oerlinghausen | 1,476.03 mi (2,375.45 km) |
| Merzifon to Oestrich-Winkel | 1,462.06 mi (2,352.97 km) |
| Merzifon to Offenburg | 1,441.16 mi (2,319.32 km) |
| Merzifon to Oftersheim | 1,425.85 mi (2,294.68 km) |
| Merzifon to Ohrdruf | 1,364.95 mi (2,196.68 km) |
| Merzifon to Ohringen | 1,382.96 mi (2,225.66 km) |
| Merzifon to Olbernhau | 1,255.55 mi (2,020.61 km) |
| Merzifon to Olching | 1,285.48 mi (2,068.78 km) |
| Merzifon to Oldenburg | 1,523.81 mi (2,452.33 km) |
| Merzifon to Oldenburg in Holstein | 1,460.76 mi (2,350.87 km) |
| Merzifon to Olfen | 1,521.91 mi (2,449.28 km) |
| Merzifon to Olpe | 1,488.62 mi (2,395.70 km) |
| Merzifon to Olsberg | 1,469.01 mi (2,364.15 km) |
| Merzifon to Oranienburg | 1,324.15 mi (2,131.02 km) |
| Merzifon to Ortenberg | 1,424.00 mi (2,291.71 km) |
