Hello, There is no much feedback about the dates so let me make a choice. I'll be happy to see you in Warsaw on 13th June evening. The host location is pretty close to 'Warszawa Okecie' airport (WAW) (10-15 minutes by bus or train). Raynair operates from the Modlin Airport (WMI) which is ~45 minutes by bus or train from the city center. The 'Warszawa Centralna' railroad station is 5 minutes away by tram. So book you tickets and see you in Poland in June.
PS. https://maps.google.com/maps?q=52.224829,20.990382&num=1&t=m&z=18 Marcin
