The trains on Line H travel between Gare du Nord in Paris and the north-west of Île-de-France region, with termini in Luzarches, Pontoise, Persan–Beaumont and Creil.

A Transilien Line H train calling all stations has an O as the second or the third letter (AOLA, OPOC, POVA, SOGA).

An E on the second position indicates that a radial service does not serve nearly all stations on the route (LEMI, LEVI).

Some of the service names may spell backwards when going in "down" direction, which is from Gare du Nord.

Examples: ADDO (to Gare du Nord) spelled backwards is ODDA (to Pontoise), AREV (to Gare du Nord) spelled backwards is VERA (to Valmondois).