| Romeoville to Butzbach | 4,343.49 mi (6,990.18 km) |
| Romeoville to Buxtehude | 4,265.70 mi (6,864.99 km) |
| Romeoville to Cadolzburg | 4,462.88 mi (7,182.31 km) |
| Romeoville to Calbe | 4,398.36 mi (7,078.47 km) |
| Romeoville to Calw | 4,412.36 mi (7,101.01 km) |
| Romeoville to Castrop-Rauxel | 4,252.62 mi (6,843.93 km) |
| Romeoville to Celle | 4,311.09 mi (6,938.03 km) |
| Romeoville to Cham | 4,537.46 mi (7,302.34 km) |
| Romeoville to Chemnitz | 4,481.24 mi (7,211.86 km) |
| Romeoville to Clausthal-Zellerfeld | 4,351.43 mi (7,002.95 km) |
| Romeoville to Cloppenburg | 4,231.18 mi (6,809.42 km) |
| Romeoville to Coburg | 4,434.12 mi (7,136.03 km) |
| Romeoville to Coesfeld | 4,232.52 mi (6,811.58 km) |
| Romeoville to Cologne | 4,261.91 mi (6,858.88 km) |
| Romeoville to Coswig | 4,492.51 mi (7,230.00 km) |
