The line operates at 20-minute intervals between Weßling and Munich Airport.

It is operated using class 423 four-car electrical multiple units, usually as two coupled sets.

In the evenings and on Sundays, they generally run as single sets.

The line runs over sections built at various times: S-Bahn services commenced in 1992 as S-Bahn line between Munich Airport and Pasing.

It was later merged with line , which had previously run between Nannhofen (now Mammendorf) and Ismaning.