| Letterkenny to Klaukkala | 1,242.36 mi (1,999.39 km) |
| Letterkenny to Kokkola | 1,229.16 mi (1,978.14 km) |
| Letterkenny to Kontiolahti | 1,421.42 mi (2,287.55 km) |
| Letterkenny to Korsholm | 1,172.65 mi (1,887.20 km) |
| Letterkenny to Kotka | 1,317.30 mi (2,119.98 km) |
| Letterkenny to Kouvola | 1,310.22 mi (2,108.60 km) |
| Letterkenny to Kuhmo | 1,422.42 mi (2,289.16 km) |
| Letterkenny to Kuopio | 1,354.23 mi (2,179.43 km) |
| Letterkenny to Kurikka | 1,186.56 mi (1,909.58 km) |
| Letterkenny to Kuusamo | 1,438.09 mi (2,314.38 km) |
| Letterkenny to Kuusankoski | 1,307.65 mi (2,104.46 km) |
| Letterkenny to Lahti | 1,275.35 mi (2,052.48 km) |
| Letterkenny to Laitila | 1,142.77 mi (1,839.11 km) |
| Letterkenny to Lapinlahti | 1,349.84 mi (2,172.35 km) |
| Letterkenny to Lappeenranta | 1,360.32 mi (2,189.22 km) |
