One major international Airport - Klotten. About 10 miles aways from Zürich.
4,236 air miles.
ride train to Zurich main station. Catch tram to Bellevue or Bürkliplatz stop, or S-train to Stadelhofen and walk.
If you consider the Banhofstrasse to be the 'center' of Zurich, then it is about 11.9 km by car from the airport to downtown, according to Google maps
two terminal airports
137.44 miles (221.19 kilometres)