[From Wikipedia] Kuala Lumpur's rail-based transit system consists of two Light Rail Transit (LRT) lines, one monorail line, two commuter rail systems consisting four lines, and an airport rail line. The various lines are operated by different companies, hence rail network is not well-integrated.

Kelana Jaya Line
Between Terminal PUTRA (Gombak) and Kelana Jaya
23 stations over 29km, operated by RapidKL

Ampang Line
Between Sentul Timur and Sri Petaling
18 stations over 15km, operated by RapidKL

Ampang Line
Between Sentul Timur and Ampang
18 stations over 15km, operated by RapidKL

Sentul-Port Klang Line
Between Sentul and Port Klang
22 stations over 153km, operated by KTM Komuter

Rawang-Seremban Line
Between Rawang and Seremban
23 stations over 153km, operated by KTM Komuter

Rawang-Kuala Kubu Bharu Route
Between Rawang and Kuala Kubu Bharu
5 stations over 22km, operated by KTM Komuter

KL Monorail
Between KL Sentral and Titiwangsa
11 stations over 8.6km, operated by KL Monorail

KLIA Transit
Between KL Sentral and KLIA
5 stations over 75km, operated by ERL

KLIA Express
From KL Sentral to KLIA
Non-stop over 75km, operated by ERL