Prestwick Airport has been criticised for how workers have been treated while on furlough.
Bosses did not top up furlough pay past the 80% wages given by the UK Government.
Instead staff have had to use holidays to take their pay packet up to 100% at the Scottish Government owned airport.
A councillor said: “I am concerned that Scottish Government airport employees did not receive 100% pay. While they have been on furlough Prestwick Airport should have made up the 20% difference to 100%.
“Taking holiday entitlement will have a knock on effect on their wages for months to come.”
Certain employees also lost a £10 call out fee recently it is understood.
A worker said lower paid employees are losing out while others such as managers “seem to be keeping perks.”
But the airport said the job retention scheme roll-out at the Ayrshire site has been a hit with employees and unions.
A spokeswoman said: “The job retention scheme (JRS) introduced by the UK Government in March 2020 has been utilised across all departments within Glasgow Prestwick Airport (GPA), including our management team.
“Whilst utilising the JRS, we have chosen to give our employees a choice of 80% pay, or 100% pay by taking some annual leave (equivalent to 20%). We have been commended for offering a choice as everyone’s circumstances are different and our management of the scheme has been positively received by our employees and unions.
“We continue to offer the full 80% payment after the government contribution is reduced to 70% in September and 60% in October, despite the immense challenges we currently face in the aviation industry.
The spokeswoman added: “Details concerning any additional payments or allowances are confidential between the company and our employees. However, we can confirm that the terms of the JRS are the same for everyone, and all employee grades are treated equally.”
The Scottish Government has put the airport up for sale. It recorded an operating profit of £3 million over the last financial year after suffering a loss previously.
