| Round Rock to Oststeinbek | 5,210.65 mi (8,385.74 km) |
| Round Rock to Ottendorf-Okrilla | 5,429.67 mi (8,738.21 km) |
| Round Rock to Ottersberg | 5,191.14 mi (8,354.34 km) |
| Round Rock to Ottobrunn | 5,472.43 mi (8,807.02 km) |
| Round Rock to Ottweiler | 5,251.22 mi (8,451.02 km) |
| Round Rock to Overath | 5,200.34 mi (8,369.14 km) |
| Round Rock to Oyten | 5,187.86 mi (8,349.06 km) |
| Round Rock to Paderborn | 5,226.75 mi (8,411.64 km) |
| Round Rock to Papenburg | 5,129.96 mi (8,255.87 km) |
| Round Rock to Parchim | 5,273.09 mi (8,486.22 km) |
| Round Rock to Pasewalk | 5,343.68 mi (8,599.83 km) |
| Round Rock to Passau | 5,520.34 mi (8,884.12 km) |
| Round Rock to Pattensen | 5,243.41 mi (8,438.46 km) |
| Round Rock to Pegnitz | 5,402.59 mi (8,694.63 km) |
| Round Rock to Peine | 5,258.13 mi (8,462.14 km) |
