Saga Airport is small but has daily flights to Tokyo (Haneda) and Osaka (Itami). From the city it takes about 30mins by bus and costs 600 Yen.
Buses also connect Fukuoka Airport to Saga (70 minutes, ¥1000).
Limited express train services run from Hakata station in Fukuoka twice each hour (usually :02 and :22 past the hour), including the ''Kamome'' and ''Midori'' train services. Trains run directly to Saga in about 40 minutes at a cost of ¥2300.
Local trains from Hakata cost only ¥1080, but you will have to change trains in Tosu and the travel time will be about 75 minutes or more, depending on the timing of the connection.
From Nagasaki to Saga it takes 75-90 minutes on the limited express (¥3740), or about 2 1/2 hours on the local service (¥2070). From Sasebo it is about 65 minutes by limited express (¥2470) or about 100 minutes by local (¥1250).