The move comes in response to a "strong demand" and "soaring" customer confidence following the removal of international travel restrictions.
The additional flights have been added from Belfast, Edinburgh, East Midlands, Glasgow and Newcastle airports.
The airline and operator have also recently added more flights and holidays to Spain, the Canaries, the Balearics and Portugal for Spring and Easter, along with extra capacity to Tenerife until May.
Steve Heapy, chief executive of Jet2.com and Jet2holidays, said after the removal of all travel restrictions, international travel is "looking like it did before the pandemic".
"This return to normal has led to customer confidence bouncing back strongly, with holidaymakers jumping at the chance to get away," he added.
"As such, we are seeing enormous growth for all seasons, with summer 22 proving to be one of the most popular times for a holiday."
Recent polling from Jet2.com and Jet2holidays has shown that customer confidence is at its highest point since the onset of the Covid-19 pandemic. Data revealed 70% of respondents said they feel confident about booking and travelling on holidays.
Belfast will gain additional Thursday services to Gran Canaria operating on 28 April, while Edinburgh will offer additional Tuesday services to Dalaman on 26 April and to Majorca on Thursdays from 28 April.
Meanwhile, East Midlands will have additional Monday services to Lanzarote operating from 2 May to 16 May, increased Sunday Antalya services operating on 1 May and additional Tuesday services operating on 26 April to Faro.
Glasgow will gain additional services to Majorca, Alicante and Tenerife to operate at the end of April and Newcastle will offer more services to Lanzarote, Antalya, Majorca and Tenerife.
