The cheapest way in. Nothing listed is quicker.
SKM or KM train
S3RLS2 · Szybka Kolej Miejska and Koleje Mazowieckie, on the ZTM ticketPickup, hours & luggage
Boards at. Warszawa Lotnisko Chopina station, underground and a short walk from the terminal; platform 1, track 1 for the S2 and track 2 for the S3 and RL
The 75-minute ticket, PLN 4.40, works on SKM trains and the RL train to Warszawa Płudy. Children under seven ride free; ages 7 to 16 and students under 26 with an ISIC pay PLN 2.20. The cheaper 20-minute ticket (PLN 3.40) runs out before every central station except Zachodnia. Buy at the station entrance or on board — on-board machines take cards only and validate on purchase.
Luggage. Free, and unlimited by the tariff: "Przewóz zwierząt i bagażu jest bezpłatny." A commuter train, full at rush hour.
Hours. The S2 runs at :26 and :56, 04:56–23:56, every day; the S3 at :11, 06:11–23:11; the RL at :41, 05:41–23:41. From 06:11 to 23:56 that's a train every 15 minutes.