Scott Burns, 27, of Queen Street in Morley, Leeds, was jailed for 10 months for his actions, which cost the company £165,000.
The attack shut down Jet2’s computer network for 12 hours in January 2018.
Burns wanted revenge for the firm’s treatment of him following an incident at a 2017 “Benidorm roadshow”, Leeds Crown Court heard.
Details about happened at the event in Benidorm were not outlined in court.
The court heard only fast-thinking by one employee at the Leeds-based airline stopped Burns’ actions being a “complete disaster” for Jet2.
Burns pleaded guilty to eight counts under the Computer Misuse Act at a previous hearing.