Deutsche Lufthansa AG will suspend flights to Venezuela next month “until further notice” as it struggles with the country’s currency controls and economic downturn. The German airline operator will halt its three weekly flights between Frankfurt and Caracas, company spokesman Andreas Bartels said by telephone on Sunday. Bartels pointed to the challenge of repatriating revenues and a sharp dropoff in ticket demand—especially among business travelers—with the nation mired in its third year of a deep recession. Lufthansa joins American Airlines Group Inc., which announced in March it was canceling its Caracas-to-New York route just three months after reinstating it, according to a Reuters report. International carriers have struggled for years to transfer back profits from Venezuela, leaving billions of dollars trapped in bolivars—the local currency. In 2014, Lufthansa temporarily suspended ticket sales to Caracas, while flights for those already with tickets operated normally. Lufthansa’s Bartels said the company hopes to restart the routes pending improved conditions in the country but is skeptical flights will return soon.  Venezuela’s economy is projected by the International Monetary Fund to contract by 8 percent in 2016, with the average rate of inflation expected to surge to near 500 percent.