The Prospect union said the ballot – the first ever to take place at the aviation watchdog – showed 67% of members were in favour of downing tools while 87% voted to take action short of strike.
Prospect general secretary Mike Clancy said "more than a decade of real-terms pay cuts" had left its members at the CAA "with no choice but to take industrial action".
“The employer can still avert this industrial action by coming back to the table with a meaningful offer that addresses the ongoing cost-of-living crisis," added Clancy.
