Cook and Condor customers can now fly from Manchester, Gatwick or Frankfurt to five new Caribbean destinations via existing Thomas Cook Group Airline destinations Antigua, Barbados and Grenada.
With LIAT, new destinations include Dominica, Guyana, St Kitts and Nevis, Casties St Lucia and St Vincent and the Grenadines.
Air Baltic, meanwhile, will offer onward journeys this winter from Gatwick to Estonian capital Tallinn and Latvian capital Riga.
"Our interline agreements provide our customers with convenient, coordinated connecting flights at competitive prices,” said Christoph Debus, Thomas Cook Group chief airline officer.
“The new group airline partnerships with LIAT and Air Baltic will allow us to offer seven new flight connections in seven countries in the Caribbean and Europe.”
