what airlines travel from Trinidad and Tobago to Fortaleza Brazil?

Whats the cheapest airline to get from Trinidad and Tobago,
port of spain to Fortaleza Brazil? When is cheapest time to go?

Which airlines:
American Airlines with stops at Miami and Rio or Sao Paulo
Varig Airline with stops at Panama City and Rio de Janeiro
Continental Airlines with stops at Newark and Sao Paulo
Caribbean Airlines with stops at New York or Miami and Sao Paulo
Delta Airlines With stops at New York and Sao Paulo

Cheapest travel day: monday