A judge imposed the term on 60-year-old Abdel Nur on Thursday in federal court in Brooklyn. Nur had pleaded guilty last year to providing material support in the scheme.
Two other men, Abdel Kadir and Russell Defreitas, were convicted on more serious charges that they conspired to kill thousands by using explosives to blow up the fuel tanks. Prosecutors have said they sought the help of militant Muslims in Guyana.
Kadir, who's a former member of Guyana's parliament, was sentenced last month to life in prison. Defreitas, who had worked as a cargo handler at the airport, is scheduled to be sentenced next month.