Here are a few suggestions for your next trip from Sliven

In 2 hours, you can reach Sliven, Burgas.

In 3 hours, you can reach Stara Zagora.

In 4 hours, you can reach Plovdiv, Varna, Shumen.

In 5 hours, you can reach Sofia, Haskovo, Veliko Tŭrnovo.

In 6 hours, you can reach Ruse, Dobrich.

In 7 hours, you can reach Pleven.

In 8 hours, you can reach Pernik.