Christmas flights could be disrupted at another UK airport.
Swissport employees announced plans to take strike action at Leeds-Bradford Airport over winter payments.
Fifty ramp agents plan to down tools between 19 December and 4 January.
They say the company’s refusal to pay a monthly cold weather payment of £125 is the cause.
It says Swissport workers at other airports receive the payments
Swissport responded that it is in ‘open discussions’ about the payments and has had ‘productive’ talks.
However, the airport said it is liaising with partners to minimise potential disruption.
The union said Ryanair flights would be most impacted if the industrial action goes ahead.
The cold weather payments are also known as de-icing payments, as they are required to undertake extra duties.
Unite regional officer Chris Muscroft said: “Our members literally sign paperwork that makes them accountable for all the lives on board a plane.”
“Our de-icing trained members are out from very early in the morning and are expected to cover any delays beyond finish times.”
He said there would be ‘enormous disruption’ to flights at the airport over the busy festive period if it goes ahead.
