Travel /
How much is a cab: Warsaw airport to the bus station? [27]
In light traffic... around 25.00-30.00 PLN to anywhere around Warszawa Centralna/Aleje Jerolzolimskie.
The proper (i.e. non-Mafia) cabs in Warsaw charge 1.80-2.30 PLN per km, and it's about 10km to the centre via the usual routes. I can't remember what the meter starts at, though.
Cost is probably a similar amount to the bus station (I assume you mean PKS Warszawa Zachodnia?), but I never take that route, so not sure exactly.
The direct route to the city centre generally follows the 175 bus route, i.e. via Zwirki i Wigury, then past the Filtry and the Sobieski Hotel, Warszawa Ochota station, etc. If they start taking you via Mokotow or Wola then they are ripping you off, likewise if they charge you a lot more than 35.00 PLN. Likewise, if they take you via the centre to go to the PKS station, they are taking the long way round to rip you off.