Tui is to base a second aircraft at Cardiff airport as a new route to the Canary Islands is added alongside more frequencies.
Tui Airways will start serving Fuerteventura year-round from December 20 and is doubling capacity to Gran Canaria with a second weekly service starting on December 18, also running in the summer.
Flights to Tenerife will rise from three to four times a week from December 21.
Canary Island winter cruise itineraries by Marella Voyager will be featured from Cardiff as a result of the increased airlift.
Tui UK & Ireland commercial director Phillip Iveson said: “We’re absolutely thrilled to expand our choice for holidaymakers travelling from Cardiff airport, with exclusive new routes and additional flights that make it even easier for travellers to reach fantastic destinations from their doorstep.
“We know that Welsh holidaymakers love the Canary Islands, and this increase in capacity means they can now fly more frequently and at more convenient times.”
Airport chief executive Spencer Birns added: “This fantastic news from Tui, one of our biggest airport customers, reinforces the tour operator’s commitment to Wales. There’ll be an additional 20,000 holidays on sale, as a result.
“Our customers have been asking for more choice from our national airport. It’s great that Tui is growing in Wales.
“Tui employs more than 550 people across Wales. This year, Tui has announced new destinations from Cardiff – Fuerteventura, Cancun and Chambery, plus more flights to Barbados.
“This announcement means Tui now has 26 destinations on sale from Cardiff.”