Japan Railways Limited Express operates a train from Saga to Nagasaki hourly. Tickets cost $27 - $35 and the journey takes 1 h 19 min. Alternatively, Nishitetsu operates a bus from Saga to Nagasaki every 20 minutes. Tickets cost $17 - $22 and the journey takes 2 h 13 min.
How to get from Saga to Nagasaki
From Saga train to Nagasaki(Nagasaki). 1 h 19 min ¥3288. From Saga bus to Kiyama AP then bus to Nagasaki. 3 h 11 min ¥4548. From Saga drive to Nagasaki. 1 h 16 min ¥1539.