| Romeoville to Nymburk | 4,582.85 mi (7,375.39 km) |
| Romeoville to Olomouc | 4,685.47 mi (7,540.53 km) |
| Romeoville to Opava | 4,693.15 mi (7,552.90 km) |
| Romeoville to Orlova | 4,715.32 mi (7,588.57 km) |
| Romeoville to Ostrava | 4,711.01 mi (7,581.63 km) |
| Romeoville to Ostrov | 4,503.44 mi (7,247.59 km) |
| Romeoville to Otrokovice | 4,711.95 mi (7,583.15 km) |
| Romeoville to Pardubice | 4,614.96 mi (7,427.06 km) |
| Romeoville to Pelhrimov | 4,621.06 mi (7,436.88 km) |
| Romeoville to Pisek | 4,587.77 mi (7,383.31 km) |
| Romeoville to Plzen | 4,541.97 mi (7,309.59 km) |
| Romeoville to Podebrady | 4,587.40 mi (7,382.70 km) |
| Romeoville to Policka | 4,645.80 mi (7,476.70 km) |
| Romeoville to Prachatice | 4,594.72 mi (7,394.49 km) |
| Romeoville to Prague | 4,565.09 mi (7,346.81 km) |
