Prague's airport is 20 km from the city centre. A taxi to the town centre now costs around 600 Kč even if you call a company to pick you up or talk to one of the representatives from reputable AAA Radiotaxi or 1.1.1. Radiocab taxi . Don't pick one up from outside the terminal (click here for taxi firms). Alternatively, use the ČEDAZ minibus service (tel. 220 11 42 96, 05:30 - 21:30) that runs every half hour between the airport and Náměstí Republiky (F-2). Tickets cost 90 Kč (including one piece of baggage, children under 10 free) and can be bought from the driver or from the booth in the arrival terminal. For an extra fee, ČEDAZ can also pick you up or drop you off at your hotel.
The cheapest way to get into town is on by bus: N°119 (2-8 times per hour between 04:18 and 00:10 with at least one wheelchair-friendly bus per hour) runs between the airport and the Veleslavín metro station (Line A, green) in about 15 minutes. Bus N°100 whisks you to Zličín (metro Line B, yellow) from the airport in 18 minutes. You can download maps of the public transport network from the transit authority website (dpp.cz).