Antigua & Barbuda's Leeward Islands Air Transport Services (LIAT) has placed an order for three 48-seats ATR 42-600s to replace Bombardier Dash 8 turboprops.
The deal also includes options for two 68-seat ATR 72-600s.
The Caribbean carrier will take delivery of its first ATR 42-600 in June 2013.
LIAT plans to progressively replace its current fleet of 14 turboprop aircraft. According to Flightglobal's Ascend Online database, LIAT operates a fleet of Dash 8 100 and 300 turboprops.
The inter-island carrier is also in discussion with operating lessors for additional -600s.
LIAT chief executive Ian Brunton says the ATR family is a proven product in terms of performances on routes served.
ATR chief executive Filippo Bagnato says: "The ATR 42-600 series aircraft perfectly match the requirements of the airlines operating inter-island flights. Their outstanding performance and reliability on this type of routes clearly explains their success in recent years."