| McHenry to Oerlinghausen | 4,257.57 mi (6,851.90 km) |
| McHenry to Oestrich-Winkel | 4,308.91 mi (6,934.52 km) |
| McHenry to Offenburg | 4,366.09 mi (7,026.55 km) |
| McHenry to Oftersheim | 4,355.00 mi (7,008.70 km) |
| McHenry to Ohrdruf | 4,375.49 mi (7,041.67 km) |
| McHenry to Ohringen | 4,395.58 mi (7,074.01 km) |
| McHenry to Olbernhau | 4,473.99 mi (7,200.19 km) |
| McHenry to Olching | 4,503.20 mi (7,247.20 km) |
| McHenry to Oldenburg | 4,197.23 mi (6,754.79 km) |
| McHenry to Oldenburg in Holstein | 4,244.73 mi (6,831.23 km) |
| McHenry to Olfen | 4,221.16 mi (6,793.29 km) |
| McHenry to Olpe | 4,263.85 mi (6,862.00 km) |
| McHenry to Olsberg | 4,274.59 mi (6,879.28 km) |
| McHenry to Oranienburg | 4,385.09 mi (7,057.12 km) |
| McHenry to Ortenberg | 4,333.72 mi (6,974.44 km) |
