| Romeoville to Pottstown (Pennsylvania) | 656.43 mi (1,056.42 km) |
| Romeoville to Pottsville (Pennsylvania) | 621.56 mi (1,000.30 km) |
| Romeoville to Poughkeepsie (New York) | 731.04 mi (1,176.50 km) |
| Romeoville to Poulsbo (Washington) | 1,732.86 mi (2,788.77 km) |
| Romeoville to Poway (California) | 1,688.06 mi (2,716.67 km) |
| Romeoville to Powder Springs (Georgia) | 567.96 mi (914.04 km) |
| Romeoville to Powell (Ohio) | 280.76 mi (451.85 km) |
| Romeoville to Powell (Tennessee) | 444.25 mi (714.96 km) |
| Romeoville to Prairie Ridge (Washington) | 1,708.96 mi (2,750.30 km) |
| Romeoville to Prairie Village (Kansas) | 389.70 mi (627.17 km) |
| Romeoville to Prairieville (Louisiana) | 797.93 mi (1,284.14 km) |
| Romeoville to Prattville (Alabama) | 640.13 mi (1,030.19 km) |
| Romeoville to Preakness (New Jersey) | 721.22 mi (1,160.69 km) |
| Romeoville to Prescott (Arizona) | 1,404.55 mi (2,260.40 km) |
| Romeoville to Prescott Valley (Arizona) | 1,397.63 mi (2,249.27 km) |
