The loan of staff from Roskilde Airport will be in place throughout the peak summer season, Naviair said in a statement.
The decision has been made to prevent major flight delays affecting passengers at Copenhagen Airport.
Naviair said that the solution will give it enough cover for most of the summer flight traffic without lengthy delays or asking air traffic controllers to work overtime.
Capacity at Roskilde Airport will be reduced during the period.
“The plan is going to have some consequences. The reallocation of air traffic controllers means reduced capacity at Roskilde Airport, whose users we naturally apologise to,” Naviair director of traffic Thorsten Elkjær said in the press statement.
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The shortage of air traffic controllers and related dispute between their trade union and Naviair, their employer, has resulted in delays for hundreds of thousands of passengers at Copenhagen Airport in recent weeks.
Naviair has asked its staff to take on extra shifts due to the shortage but has also said it has increased intake on training programmes to eventually increase the number of staff available.
The air traffic controllers have said that the overtime is not at a manageable level, and that they have taken 1,500 additional shifts so far this year.
Figures from April show that some 45 percent of flights from Copenhagen Airport were delayed last month and the issue has continued into May.