CityJet is an Irish regional airline with headquarters in Swords, Dublin. It was founded in 1992 and has gone through a series of corporate structures. Air France sold CityJet to Intro Aviation in May 2014; in March 2016 the airline was bought by founder Pat Byrne and other investors. Since 2017, CityJet had moved away from scheduled flights and has instead focused on wet-leasing and charter flights. As of August 2020, the airline operates wet-lease services on behalf of Scandinavian Airlines.

In May 2021 CityJet handed its 75% share of Air Antwerp over to co-owner KLM