Päijänne Risteilyt Hilden Oy boats travel from Lahti to Jyväskylä on occasional Mondays in high summer.
Intercity buses depart from the Lahti Travel Centre. There are regular buses to Helsinki (from €10, 1½ hours), Tampere (€15 to €25.60, two hours) and Hämeenlinna (€10 to €13.20, 75 minutes). There are also hourly buses to Helsinki airport (from €10, 75 minutes).
Numerous direct trains run daily to/from Helsinki (from €13, one hour) and Riihimäki, where you can change for Tampere. There are also services to/from Helsinki Airport (from €12.50, 55 minutes).