One runway of the Noida international airport will be built during the first phase of construction and around 90 percent of the air traffic in the initial years will be domestic only, said a top official of Zurich Airport International on Wednesday. Officials of the Uttar Pradesh government and Zurich Airport International signed a concession agreement on Wednesday to begin the construction of the Noida airport in Jewar on the outskirts of Delhi. Zurich Airport International currently holds 100 per cent shareholding in the Noida airport project. The Noida airport site is around 70 km from the main Delhi region.