| Romeoville to Parma (Ohio) | 330.02 mi (531.11 km) |
| Romeoville to Parma Heights (Ohio) | 328.19 mi (528.17 km) |
| Romeoville to Parole (Maryland) | 634.72 mi (1,021.49 km) |
| Romeoville to Parsippany (New Jersey) | 712.20 mi (1,146.17 km) |
| Romeoville to Pasadena (California) | 1,707.29 mi (2,747.62 km) |
| Romeoville to Pasadena (Maryland) | 630.65 mi (1,014.94 km) |
| Romeoville to Pasadena (Texas) | 916.34 mi (1,474.70 km) |
| Romeoville to Pasadena Hills (Florida) | 979.24 mi (1,575.94 km) |
| Romeoville to Pascagoula (Mississippi) | 778.75 mi (1,253.28 km) |
| Romeoville to Pasco (Washington) | 1,565.87 mi (2,520.03 km) |
| Romeoville to Passaic (New Jersey) | 727.01 mi (1,170.01 km) |
| Romeoville to Pataskala (Ohio) | 302.91 mi (487.48 km) |
| Romeoville to Patchogue (New York) | 785.35 mi (1,263.90 km) |
| Romeoville to Paterson (New Jersey) | 724.65 mi (1,166.20 km) |
| Romeoville to Patterson (California) | 1,773.01 mi (2,853.39 km) |
