Official sources said Javadekar took train from Guru Dronacharya metro station in evening and disembarked at Jor Bagh, which is close to his Paryavaran Bhawan office.
Javadekar is a frequent commuter of Airport Metro Express and travels by it when he has to catch a flight from the IGI Airport, they said.
Union Urban Development Minister M Venkaiah Naidu, who too has travelled by Delhi Metro a few times, had previously promoted its use for environmental reason while terming it as a 'symbol of modern India'.