There are two internation airports in Paris, Charles de Gaulle and Orly. Both have convenient access to the center of Paris through public transportation and cost around 50? to go to/from by taxi. The joined website for both Paris international airports..
Paris is very well covered with public transportation. The UIC-P is near RER-C "Champ de Mars - Tour Eiffel" station and Metro line 6 "Bir Hakeim" station. To prepare your travel, you can use the RATP website.
The venue is in a very touristic area, surrounded by high end hotels that are quickly full. If you want alternatives, you might want to look at hotels either along the Metro line 6 or along the RER-C between "Champ de Mars - Tour Eiffel" and "Bibliothèque François Miterrand"