The carrier said holidaymakers flying to and from the airport in Majorca may have to wait “slightly longer than normal to clear immigration in both departures and arrivals”.
It added that Jet2 staff would be available to help passengers at the airport.
Jet2 said: “There is currently maintenance work taking place at Palma airport. We are working with the airport to ensure that any disruption to your airport experience will be kept to a minimum.
“We thank you in advance for your patience and understanding should you experience an extended wait time, which is beyond our control."