By Plane
Malpensa Airport is the main international airport in Milan. It is located about 45km from the city center. It consists of two different terminals linked by a shuttle bus. It's possible to reach the city center by taxi or by bus (http://www.malpensashuttle.it/e-default.htm). There is also a train (Malpensa Expess) which connects the Malpensa Airport (Terminal 1) to Cadorna Station (http://www.malpensaexpress.it/en/index.php). From Cadorna Station, it's easy to reach Bird & Bird's office by underground taking the red line in the direction of Sesto San Giovanni and getting off at San Babila stop.
Linate Airport lies a short distance from the city center, only about 7km, and it's possible to reach it by taxi or by n. 73 bus (Piazza San Babila stop).