NEW DELHI, Feb 4 : India's IndiGo said on Wednesday it would suspend long-haul flights to Copenhagen and trim some services between Delhi and Britain, citing operational constraints from airspace closures linked to geopolitical tensions and airport congestion. It is the second major Indian airline to scale back overseas operations after Air India, which has suspended some U.S. routes because Pakistan has banned Indian carriers from its airspace. IndiGo did not specify the geopolitical issues it