The woman had been reported overboard on Saturday.
Her husband said she told him she was going out for some air around 1 a.m. Sunday, according to ABC News.
Miguel Chicon, head of maritime search and rescue in Palma de Mallorca said to ABC that as soon as they were notified the woman was missing, the crew checked security cameras and confirmed the woman had gone overboard.
An immense search operation began immediately. The ship turned around and began looking. Chicon's search and rescue agency sent out two choppers, a plane and a rescue ship to search.
Passengers assisted in the search, NBC News reported.
Passenger Samantha Fox told NBC News; "They urged passengers to look out in the water for a person with pink pyjamas."
The woman's name was not released.
The cruise skipped a stop because of the search but resumed normal scheduling after the search was called off.
"Due to the search, yesterday's call to Palma de Mallorca was cancelled," NCL said. "The ship returns to Barcelona, Spain today as scheduled."