Warsaw airport has two international airports. The main one is called Frederic Chopin airport which is situated about 10km/ 6miles from Warsaw’s centre.
There are several options to get to the city centre.
1/ Taxis from the airport
A taxi ride should take around 20 minutes and taxi fares are approximately 50 zloty. Usual airport taxi etiquette applies i.e. ensure you only use airport approved taxis from the taxi rank otherwise you may get stung for a higher fare than you were expecting. You can always ask airport staff if you’re not sure.