Delhi Metro has really made our lives convenient and hassle free. The Airport express line is the best way to reach NDLS from IGIA. Airport express line connects Dwarka sector 21 to New Delhi metro station. You can take this metro from Terminal 3(IGIA) and get down at last station that is New Delhi metro station. From there NDLS is at the walking distance. Also, you can get this metro from Terminal 2 at the aerocity metro station where the connectivity is through a feeder bus service.