Nur's surrender came a day after the Trinidadian police commissioner, said he was considered armed and dangerous, urging all citizens to be on the lookout for him.
Two other men accused of plotting the airport attack were arrested in Trinidad and Tobago over the weekend.
Abdul Kadir, a citizen of Guyana and former member of its parliament, and Kareem Ibrahim, a citizen of Trinidad and Tobago, made their first court appearances in the capital of the twin-island nation on Monday.
Russell Defreitas, a US citizen and native of Guyana, was arrested in New York and law enforcement officials have said he was a former airport employee who conducted surveillance for the group, identifying targets and escape routes.
Authorities have acknowledged the plot to detonate explosion next to fuel tanks and pipelines at the airport was more "aspirational" than operational, and was stopped before it got off the ground.