The agreement will come into effect on January 11th, 2010, and will offer customers more travel options to the U.S. and Latin America.
By codesharing, both companies can sell each other's flights, combining segments from both airlines under a same ticket.
Alex Benitez, vice president of Corporate Development at TACA, told Laprensagrafica.com: "We are pleased to offer our customers new options to travel to the U.S. market with U.S. Airways".
More austere budgets have reduced corporate demand for traveling by plane.
In the local region, the company TACA registered a 27% decrease in the sector of business travel.
The journalists Guadalupe Hernández and Daniel Choto write for Elsalvador.com: "As an answer to the need of corporations to save, TACA has implemented a change in the structure of prices.