Siedlce is located 100 km from Warsaw to the East.
Coordinates:
Lat: 52°11″N
Long: 22°17″E

The best option is to arrive to the Warsaw Chopin Airport, and then use the transport option: by train or car.
https://www.lotnisko-chopina.pl/en/index.html

The second airport is Warsaw Modlin Airport:
https://en.modlinairport.pl/

How to travel from CHOPIN AIRPORT to SIEDLCE

By Public Transport

You can use a very helpful application (in English) – „Jak dojadę” app

The link below:

https://jakdojade.pl/warszawa/trasa/

OTHER USUFUL INFORMATION

• Tickets for buses available at tickets machines at the airport bus stop and in the bus.
• Tickets for the train available at ticket machines at the station, train ticket office and at the conductor.
• From the airport, you can order an UBER or a cab from the waiting line in front of the exit. We do not recommend using the cab service in the arrivals hall
• The route from Warsaw airport to Siedlce by public transport takes about 2 hours.

TRANSPORT IN SIEDLCE

The frequency of public transportation is limited, we suggest taking a cab.

Cab telephone numbers:

• PLUS TAXI –             (+48) 690 313 131     or     (+48) 690 323 232                (inc. card payment)
• ECHO TAXI   –          (+48) 800 62 26 44                                                             (inc. card payment)
• MERCEDES TAXI –  (+48) 25 19625
• RADIO TAXI –           (+48) 25 19623
• HALO TAXI –            (+48) 25 6322222
• POLONIA TAXI –      (+48) 25 19629