S S Josan was apprehended after CISF personnel found him roaming suspiciously inside Terminal-3 (T3) building of the Indira Gandhi International (IGI) Airport last night, they said.
He told the Central Industrial Security Force (CISF) personnel that he used a cancelled ticket to enter the terminal to see his family off, who were travelling to Hong Kong, the sources added.
Josan, a Canadian passport holder, was subsequently handed over to the police, they said.