As of 1 June 2012 Chopin Airport is linked to Legionowo and Sulejówek Miłosna (through the city centre) by a railway service. The service is operated by two companies: Szybka Kolej Miejska – SKM and Koleje Mazowieckie.
SKM S2 LINE
Train starts jurney at Warsaw Chopin Airport station.The train goes from airport, through the city and finishes trip at Sulejówek Miłosna station.Trains depart approximately every 30 minutes.See timetable here.
There are a lot of ticket options so it will not be a problem to find the best one.Ticket can be purchased on ZTM website (Warsaw public transportation).It should be noted that there are ZONE 1 and ZONE 2.Only stations Sulejówek and Sulejówek Miłosna are in ZONE 2.Find the best ticket option here.
SKM S3 LINE
Train on line S3 stops at WARSZAWA CENTRUM railway station and goes to Wieliszew as final stop.Timetable can be found here.Trains depart every one hour.
On WARSZAWA CENTRUM station You can make a lot of connections with PKP railways.
Koleje Mazowieckie RL line
KML is another option for Your jurney to the city of Warsaw.KML is super convenient way to get from Chopin airport to the Modlin airport on the other end of the city.Trains depart every hour and the stop at many stations in Warsaw.Find their timetable here.
All services from Warsaw Chopin Airport (S2, S3, RL) operate through Warszawa Zachodnia (Warsaw West) station, where major domestic and international bus terminal is located, as well as Warszawa Wschodnia (Warsaw East) station, where change for domestic buses is possible.
Chopin Airport is served by five public bus routes all with stops at Warsaw’s key transport nodes and the biggest hotels.
Bus 175 running daily between:
04:27 – 22:58
04:47 – 23:18
04:34 – 22:35
06:13 – 17:54
23:15 – 04:49
For safety reasons it is strongly advised you to use licensed taxi services offered at Chopin Airport. Taxi tariffs should be clearly displayed in the car window.The taxi fare from the airport to the city centre is approximately 40 PLN (9.30 Euro).
Source: Warsaw Chopin Airport