| Siena to Klaukkala | 1,304.90 mi (2,100.03 km) |
| Siena to Kokkola | 1,492.40 mi (2,401.78 km) |
| Siena to Kontiolahti | 1,535.63 mi (2,471.36 km) |
| Siena to Korsholm | 1,428.88 mi (2,299.55 km) |
| Siena to Kotka | 1,351.18 mi (2,174.51 km) |
| Siena to Kouvola | 1,369.19 mi (2,203.50 km) |
| Siena to Kuhmo | 1,605.08 mi (2,583.12 km) |
| Siena to Kuopio | 1,502.81 mi (2,418.54 km) |
| Siena to Kurikka | 1,406.05 mi (2,262.82 km) |
| Siena to Kuusamo | 1,705.56 mi (2,744.83 km) |
| Siena to Kuusankoski | 1,369.94 mi (2,204.71 km) |
| Siena to Lahti | 1,356.27 mi (2,182.71 km) |
| Siena to Laitila | 1,287.30 mi (2,071.70 km) |
| Siena to Lapinlahti | 1,525.29 mi (2,454.72 km) |
| Siena to Lappeenranta | 1,409.42 mi (2,268.25 km) |
