Start with the 06:22 NS Int train from Paris to Brussels, about 1h 22m. Transfer in Brussels, then take the 09:00 Regional connection bus on to Maastricht (2h 8m). Transfer in Maastricht, then take the 13:00 FlixBus bus on to Brussels South (1h 35m). Transfer in Brussels South, then take the 15:30 FlixBus bus on to Leuven (45 min). You arrive in Leuven around 16:15. In total it's roughly EUR 122 over 9h 53m, 3 transfers.
NS IntOpens Omio — enter your date to compare trains and buses for this route; the price is finalised at checkout.
Opens Omio — enter your date to compare trains and buses for this route; the price is finalised at checkout.
FlixBusOpens Omio — enter your date to compare trains and buses for this route; the price is finalised at checkout.
FlixBusOpens Omio — enter your date to compare trains and buses for this route; the price is finalised at checkout.
Ground-only route to Leuven by train + bus. Train (NS Int, 1h 22min) + Bus (Regional connection, 2h 8min) via Brussels + Bus (FlixBus, 1h 35min) via Maastricht + Bus (FlixBus, 45min) via Brussels South.