A flew train "flights": (It seems to be a halve hour between flights.)

KL202 RTM-AMS
KL206 RTM-AMS
KL210 RTM-AMS
KL214 RTM-AMS
KL218 RTM-AMS
KL220 RTM-AMS

(Those trains leave .28/.58 train runs to Amsterdam Centraal and stops between Rotterdam Centraal and Schiphol at Den Haag HS and Leiden Centraal. They teak 50 min.)

KL205 AMS-RTM
KL209 AMS-RTM

(Those trains leave .15/.45 train runs to Vlissingen or Dordrecht and stops between Schiphol and Rotterdam Centraal at Leiden Centraal and Den Haag HS. They teak 50 min.)