The high-ranking South Korean source, speaking on condition of anonymity, told Yonhap news agency that Global Positioning System jamming signals from North Korea appear to have stopped Monday.
While the jamming could resume, the source said South Korea is keeping a close eye on military activities in Kaesong where the signals originated.
North Korea has been accused of global positioning disruptions affecting hundreds of commercial flights and ships since April 28. No damage resulted because all aircraft and ships had backup navigation systems.
The GPS attacks began after South Korean leaders commented about a failed rocket launch by the North.