Estonian Air has just announced that it will return its oldest 735 (ES-ABF) to Maersk and lease another, newer 735 in April. When the two planes currently undergoing D-check are back in service, this will increase the number of aircraft to five.
Also, a route Tallinn-Munich was announced (five flights a week), plus increased number of flights to:
Copenhagen (from 19 to 25 flights a week)
Hamburg (from 3 to 5 flights a week)
LGW (from 6 to 9 flights a week) and
Oslo (from 3 to 6 flights a week).
Source: The full article on Estonian Air website.