Last month, almost 700 workers at Glasgow and Edinburgh airports threatened to walkout in disputes over pay.
Three separate disputes at Aberdeen airport, meanwhile, saw in excess of 140 workers vote on the prospect of strike action.
At Glasgow, nearly 400 workers employed by ICTS and Menzies Aviation have now backed a new pay offer, the Unite union has confirmed.
Elsewhere, a dispute involving a similar number of Edinburgh airport workers, also represented by Unite, has also been resolved.
In addition, Unite has confirmed disputes involving about 70 workers employed by Aberdeen airport and another involving around another 70 employed at Aberdeen by ICTS have both been addressed.
However, a strike ballot involving ICTS HBS security staff at Aberdeen airport will run until Wednesday (17 June), with Unite saying no new pay offer has been put forward.
ICTS workers at Glasgow airport have secured a 5% increase in basic pay and shift allowances, backdated to 1 January, as well as another increase for 2027 in line with RPI inflation plus a further percent.
Menzies workers at the airport, meanwhile, have secured a 4.4% pay rise backdated to January, and then from 1 July, a minimum 5% pay increase, rising to 11.1% for some workers.
Unite General Secretary Sharon Graham said hundreds of frontline workers at Glasgow airport had secured "vastly improved" pay deals.
Unite Industrial Officer Carrie Donoghue added the resolution lifted the threat of action at Glasgow airport and would ensure "no disruption happens during the extremely busy summer period".
More than 400 Edinburgh airport workers, employed by the airport, including airport ambassadors, airside support officers, engineers and managers have secured a new two-year pay deal.
Workers will be paid an additional 5.5% or £1,800, whichever is greater, this year, and get improvements to shift, sickness and paternity pay. Next year, they will also receive a pay rise of 4% or a rise in line with RPI inflation, plus an additional 0.5%, effectively from January 2027.
Finally, at Aberdeen, around 70 workers employed by the airport – including admin staff, airfield operators, technicians, firefighters and crew commanders – have secured a 4.2% pay increase.
Another 70 workers employed by ICTS at Aberdeen, staffing security search areas at the airport, have agreed a new two-year pay deal with the firm worth 5% backdated to 1 January.
Like their colleagues at Glasgow, the ICTS workers at Aberdeen have also secured another rise for 2027 linked to RPI inflation plus another percent.