| Romeoville to Portage (Indiana) | 47.63 mi (76.66 km) |
| Romeoville to Portage (Michigan) | 134.84 mi (217.00 km) |
| Romeoville to Portage (Wisconsin) | 149.57 mi (240.72 km) |
| Romeoville to Portales (New Mexico) | 976.19 mi (1,571.03 km) |
| Romeoville to Porterville (California) | 1,698.69 mi (2,733.77 km) |
| Romeoville to Portland (Maine) | 915.06 mi (1,472.65 km) |
| Romeoville to Portland (Oregon) | 1,736.36 mi (2,794.41 km) |
| Romeoville to Portland (Tennessee) | 358.29 mi (576.61 km) |
| Romeoville to Portland (Texas) | 1,082.54 mi (1,742.17 km) |
| Romeoville to Portsmouth (New Hampshire) | 888.20 mi (1,429.43 km) |
| Romeoville to Portsmouth (Ohio) | 336.90 mi (542.19 km) |
| Romeoville to Portsmouth (Virginia) | 709.32 mi (1,141.55 km) |
| Romeoville to Post Falls (Idaho) | 1,468.34 mi (2,363.07 km) |
| Romeoville to Potomac (Maryland) | 601.77 mi (968.45 km) |
| Romeoville to Potomac Park (California) | 1,714.26 mi (2,758.84 km) |
