| Tomball to Oerlinghausen | 5,163.14 mi (8,309.27 km) |
| Tomball to Oestrich-Winkel | 5,205.14 mi (8,376.86 km) |
| Tomball to Offenburg | 5,255.15 mi (8,457.35 km) |
| Tomball to Oftersheim | 5,249.48 mi (8,448.21 km) |
| Tomball to Ohrdruf | 5,279.80 mi (8,497.02 km) |
| Tomball to Ohringen | 5,291.00 mi (8,515.04 km) |
| Tomball to Olbernhau | 5,381.88 mi (8,661.31 km) |
| Tomball to Olching | 5,397.74 mi (8,686.83 km) |
| Tomball to Oldenburg | 5,106.71 mi (8,218.45 km) |
| Tomball to Oldenburg in Holstein | 5,161.60 mi (8,306.79 km) |
| Tomball to Olfen | 5,123.76 mi (8,245.89 km) |
| Tomball to Olpe | 5,164.21 mi (8,310.99 km) |
| Tomball to Olsberg | 5,177.39 mi (8,332.20 km) |
| Tomball to Oranienburg | 5,299.95 mi (8,529.44 km) |
| Tomball to Ortenberg | 5,233.32 mi (8,422.21 km) |
