The move, said Jet2, to extend its Canaries and Balearics programmes "comes in response to strong demand from customers" for flights and Atol packages early in the summer season and over the Easter holidays.
Additional flight and holiday capacity amounting to around an extra 11,000 seats will be available from Belfast International, Birmingham, Edinburgh, Glasgow, Leeds Bradford, Manchester and Newcastle International airports, said Jet2 on Tuesday (7 January).
In total, Jet2 will offer more than 2,000 Tenerife and Majorca departures between March and May across its 10 UK bases.