The airport is only 10 km from downtown Valencia. It is even closer to the Conference Center district (less than 8 km). You can take the Metro from the airport to reach the city, or a taxi, which, under normal traffic conditions, should cost between €20 and €30 for a ride downtown or to the Conference Center.
The Conference Center, at avenida de las Cortes Valencianas, 50 is conveniently located on the northwest side of the city, only 7 minutes by car from the airport, and 8 minutes from the city center. You can come by buses 62, 63, 99 or N3 (tickets available from the driver, or discount packs at most press stands) or by metro line 4 (tickets available on automatic dispensers at the metro stations), or you can take a taxi –not expensive in the city of Valencia.