| Groningen to Castelfidardo | 745.34 mi (1,199.51 km) |
| Groningen to Castelfiorentino | 694.08 mi (1,117.01 km) |
| Groningen to Castelfranco di Sopra | 700.79 mi (1,127.82 km) |
| Groningen to Castelfranco di Sotto | 684.60 mi (1,101.76 km) |
| Groningen to Castelfranco Emilia | 629.15 mi (1,012.52 km) |
| Groningen to Castelfranco Veneto | 574.28 mi (924.22 km) |
| Groningen to Castellabate | 976.53 mi (1,571.58 km) |
| Groningen to Castellammare del Golfo | 1,091.94 mi (1,757.31 km) |
| Groningen to Castellammare di Stabia | 940.88 mi (1,514.19 km) |
| Groningen to Castellamonte | 543.76 mi (875.10 km) |
| Groningen to Castellana Grotte | 985.14 mi (1,585.43 km) |
| Groningen to Castellaneta | 995.28 mi (1,601.74 km) |
| Groningen to Castellanza | 535.40 mi (861.65 km) |
| Groningen to Castellarano | 627.32 mi (1,009.58 km) |
| Groningen to Castelleone | 565.77 mi (910.52 km) |
