Start with the 09:30 flight from Istanbul to Eindhoven, about 3h. Transfer in Eindhoven, then take the 14:57 NS train on to Maastricht (1h 6m). Transfer in Maastricht, then take the 16:24 DB Regio AG NRW train on to Aachen (3 min). You arrive in Aachen around 16:27. In total it's roughly EUR 107 over 6h 57m, 2 transfers.
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NSOpens Omio — enter your date to compare trains and buses for this route; the price is finalised at checkout.
DB Regio AG NRWOpens Omio — enter your date to compare trains and buses for this route; the price is finalised at checkout.
Fly into Eindhoven, then continue to Aachen by train (1h 6m) — routing via Eindhoven keeps the trip simple. Flight (3h) + Train (NS, 1h 6min) via Eindhoven + Train (DB Regio AG NRW, 3min) via Maastricht.