| Piqua to River Ridge (Louisiana) | 780.57 mi (1,256.21 km) |
| Piqua to Riverbank (California) | 1,965.39 mi (3,162.99 km) |
| Piqua to Riverdale (Georgia) | 455.19 mi (732.56 km) |
| Piqua to Riverdale (Illinois) | 205.01 mi (329.94 km) |
| Piqua to Riverside (California) | 1,866.35 mi (3,003.60 km) |
| Piqua to Riverside (Ohio) | 26.18 mi (42.13 km) |
| Piqua to Riverton (Utah) | 1,454.12 mi (2,340.19 km) |
| Piqua to Riverton (Wyoming) | 1,260.27 mi (2,028.21 km) |
| Piqua to Riverview (Florida) | 858.94 mi (1,382.34 km) |
| Piqua to Riverview (Michigan) | 149.97 mi (241.36 km) |
| Piqua to Riviera Beach (Florida) | 954.16 mi (1,535.58 km) |
| Piqua to Riviera Beach (Maryland) | 416.07 mi (669.60 km) |
| Piqua to Roanoke (Virginia) | 304.51 mi (490.07 km) |
| Piqua to Roanoke Rapids (North Carolina) | 439.60 mi (707.47 km) |
| Piqua to Robbinsdale (Minnesota) | 571.48 mi (919.70 km) |
