The massive capacity increase will cover Turkey, Greece, Balearics, Canaries, Egypt, Mexico and Florida. The two million seats is just under the 2.4 million Atol-protected capacity left when Thomas Cook collapsed.
Tui said it would offer more 7, 10, 11 and 14-night durations and “even more flights” from Manchester, Doncaster Sheffield, Birmingham, Newcastle and Glasgow.
Tui Airways will also create jobs for more than 100 pilots and 200 cabin crew.
Andrew Flintham, managing director Tui UK and Ireland, said: “At Tui we’re committed to offering outstanding holidays, flown from local airports to popular holiday hot spots.