| Piqua to Reidsville (North Carolina) | 361.76 mi (582.20 km) |
| Piqua to Reisterstown (Maryland) | 397.20 mi (639.22 km) |
| Piqua to Rendon (Texas) | 890.68 mi (1,433.41 km) |
| Piqua to Reno (Nevada) | 1,876.30 mi (3,019.61 km) |
| Piqua to Renton (Washington) | 1,937.47 mi (3,118.05 km) |
| Piqua to Republic (Missouri) | 537.81 mi (865.52 km) |
| Piqua to Reston (Virginia) | 376.64 mi (606.14 km) |
| Piqua to Revere (Massachusetts) | 704.26 mi (1,133.40 km) |
| Piqua to Rexburg (Idaho) | 1,430.45 mi (2,302.09 km) |
| Piqua to Reynoldsburg (Ohio) | 77.81 mi (125.22 km) |
| Piqua to Rialto (California) | 1,861.23 mi (2,995.36 km) |
| Piqua to Richardson (Texas) | 849.86 mi (1,367.72 km) |
| Piqua to Richfield (Minnesota) | 563.83 mi (907.40 km) |
| Piqua to Richfield (Wisconsin) | 296.59 mi (477.32 km) |
| Piqua to Richland (Washington) | 1,799.23 mi (2,895.59 km) |
