Delta Air Lines plans to sell its "economy comfort" seats, offering extra legroom for a fee, through more travel agents via a deal with Madrid-based travel transaction processor Amadeus.

The deal will allow access to economy comfort seats for travel agents who book through the Amadeus system, according to Atlanta-based Delta.

The move comes after Delta in June announced it reached a similar economy comfort distribution deal with Atlanta-based distributor Travelport. The airline will also continue to sell the seats directly through its website and at the airport.