| Piqua to Redondela | 3,797.18 mi (6,110.96 km) |
| Piqua to Reinosa | 3,979.83 mi (6,404.92 km) |
| Piqua to Requena | 4,234.36 mi (6,814.54 km) |
| Piqua to Reus | 4,277.07 mi (6,883.28 km) |
| Piqua to Rianxo | 3,777.20 mi (6,078.81 km) |
| Piqua to Ribadeo | 3,832.52 mi (6,167.84 km) |
| Piqua to Rincon de la Victoria | 4,180.68 mi (6,728.15 km) |
| Piqua to Ripoll | 4,288.82 mi (6,902.19 km) |
| Piqua to Ripollet | 4,312.02 mi (6,939.52 km) |
| Piqua to Rojales | 4,300.89 mi (6,921.62 km) |
| Piqua to Ronda | 4,137.69 mi (6,658.97 km) |
| Piqua to Roquetas de Mar | 4,258.66 mi (6,853.64 km) |
| Piqua to Rosas | 4,330.04 mi (6,968.52 km) |
| Piqua to Rubi | 4,306.58 mi (6,930.77 km) |
| Piqua to Rute | 4,155.97 mi (6,688.39 km) |
