| Piqua to Reichenbach/Vogtland | 4,401.10 mi (7,082.88 km) |
| Piqua to Reinbek | 4,223.87 mi (6,797.65 km) |
| Piqua to Reinfeld | 4,221.19 mi (6,793.35 km) |
| Piqua to Reinheim | 4,298.26 mi (6,917.38 km) |
| Piqua to Reiskirchen | 4,271.49 mi (6,874.29 km) |
| Piqua to Rellingen | 4,203.66 mi (6,765.13 km) |
| Piqua to Remagen | 4,211.05 mi (6,777.03 km) |
| Piqua to Remscheid | 4,189.69 mi (6,742.65 km) |
| Piqua to Rendsburg | 4,176.57 mi (6,721.54 km) |
| Piqua to Renningen | 4,339.64 mi (6,983.98 km) |
| Piqua to Reutlingen | 4,360.75 mi (7,017.95 km) |
| Piqua to Rhaude | 4,137.64 mi (6,658.89 km) |
| Piqua to Rheda-Wiedenbruck | 4,209.09 mi (6,773.87 km) |
| Piqua to Rhede | 4,149.42 mi (6,677.85 km) |
| Piqua to Rheinau | 4,303.88 mi (6,926.42 km) |
