| Piqua to Robertsville (New Jersey) | 524.64 mi (844.33 km) |
| Piqua to Robinson (Texas) | 937.39 mi (1,508.58 km) |
| Piqua to Robstown (Texas) | 1,146.46 mi (1,845.05 km) |
| Piqua to Rochester (Michigan) | 184.65 mi (297.16 km) |
| Piqua to Rochester (Minnesota) | 499.21 mi (803.40 km) |
| Piqua to Rochester (New Hampshire) | 716.90 mi (1,153.74 km) |
| Piqua to Rochester (New York) | 400.46 mi (644.49 km) |
| Piqua to Rochester Hills (Michigan) | 182.61 mi (293.88 km) |
| Piqua to Rock Hill (South Carolina) | 400.74 mi (644.93 km) |
| Piqua to Rock Island (Illinois) | 343.69 mi (553.12 km) |
| Piqua to Rock Springs (Wyoming) | 1,304.18 mi (2,098.87 km) |
| Piqua to Rockford (Illinois) | 289.78 mi (466.35 km) |
| Piqua to Rockledge (Florida) | 841.39 mi (1,354.09 km) |
| Piqua to Rocklin (California) | 1,961.34 mi (3,156.48 km) |
| Piqua to Rockport (Texas) | 1,111.19 mi (1,788.29 km) |
