| Hertford to Imatra | 1,261.87 mi (2,030.79 km) |
| Hertford to Jakobstad | 1,162.10 mi (1,870.22 km) |
| Hertford to Jamsa | 1,169.10 mi (1,881.49 km) |
| Hertford to Janakkala | 1,126.38 mi (1,812.73 km) |
| Hertford to Jarvenpaa | 1,128.91 mi (1,816.81 km) |
| Hertford to Joensuu | 1,324.22 mi (2,131.13 km) |
| Hertford to Joutseno | 1,252.18 mi (2,015.19 km) |
| Hertford to Jyvaskyla | 1,196.46 mi (1,925.51 km) |
| Hertford to Jyvaskylan Maalaiskunta | 1,197.85 mi (1,927.75 km) |
| Hertford to Kaarina | 1,041.25 mi (1,675.73 km) |
| Hertford to Kajaani | 1,312.79 mi (2,112.73 km) |
| Hertford to Kalajoki | 1,216.68 mi (1,958.06 km) |
| Hertford to Kangasala | 1,124.07 mi (1,809.02 km) |
| Hertford to Kankaanpaa | 1,086.18 mi (1,748.03 km) |
| Hertford to Karhula | 1,188.97 mi (1,913.47 km) |
