The opening of the new Louis Armstrong Airport terminal in New Orleans has been delayed from May 15 until an unspecified date in the fall.

The delay was caused by the complexity of coordinating the late stages of the $1 billion project, the city and its aviation authority said in a jointly issued press release.

"The fact is: it is not ready, and there is more work to be done to get us there," Mayor LaToya Cantrell said. "I fully support the additional time needed and look forward to opening our new, completely operational facility at its peak on day one." 

The delay is the second this year. Officials had earlier planned to open the new terminal in February. 

The 35-gate terminal will replace in its entirety the existing landside facilities at the airport -- the first such change at one of the 50 busiest U.S. airports since Indianapolis in 2008.

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