Guernsey Airport has apologised again for poor service following complaints about "long queues" and "excessive delays".
It says a new body scanner will be introduced at the end of September with the aim of reducing waiting times in security.
The scanner is part of a £1.5m investment which will see new modern screening equipment installed to deal with slow security clearance issues.
Bosses hope the changes will reduce the need for manual searches and ensure the security process is less intrusive for passengers.
Ash Nicholas, Head of Aviation Services at Guernsey Airport, says service in recent weeks has "fallen well below" the expected standard, due to several challenges, including "under-staffing" which led to the central security search area being reduced to one lane at peak times.