International air traffic to and from Iran is booming. At the country’s main airport in the capital Tehran, for instance, there were 140 more flights during a week last month than a week in May 2015 before the nuclear deal was signed.

The map above uses data from FlightRadar24, a company that tracks real-time flight data. It shows a remarkable thickening in routes, as well as the narrow spindles of new ones. Much of the growth in international air traffic is due to airlines increasing capacity or frequency of existing routes. But it also includes many European airlines, such as Air France and British Airways, that have been able to restart flights to Iran after long hiatuses.

Earlier U.S. sanctions had prohibited planes with American-made parts from flying to Iran, precluding many airlines from flying there. Both Boeing and Airbus, the two biggest plane manufacturers, use American parts.

Not only can those planes fly to Iran now, but the state-owned flag-carrier, Iran Air, inked deals worth tens of billions of dollars this summer with both companies to buy hundreds of planes. Those deals have not been finalized, and are subject to a slew of skittish “ifs and buts” stipulated in the nuclear deal. Iran Air’s eyes may have been bigger than its stomach, too -- analysts doubt that the company can afford the planes -- or even if they did, compete with established foreign airlines.

Iran Air has had to fly planes from before the Islamic Revolution, as well as Russian-made Tupolev jets due to the sanctions. The airline has an abysmal safety record, and Iranians prefer to fly airlines from the Gulf and Europe. But the massive aircraft order -- which would make Iran Air larger than Air France -- demonstrates the lofty hopes for growth in trade and tourism.

“Iran went from a marginalized and difficult place in the world economy in 2013 to a place of growth,” said Ray Takeyh, a fellow at the Council on Foreign Relations specializing on Iran. Recent IMF data indicates that the nuclear deal will transform Iran’s economy from one that was declining to one that will grow 4.5 percent in the current financial year.