Iberia is set to add new destinations to its network this winter. Currently, the Spanish airline serves eight markets in the U.S.

People who hope to experience Airbus' ultra-rare A330-800neo can board in about three dozen cities worldwide this year.

Iberia is not the only European airline to offer Washington flights on a non-winter basis. For example, Brussels Airlines’ Airbus A330 services from the Belgian capital only run during the summer.

The flights operated with Airbus A330-200 aircraft will have a capacity for 288 passengers, including 19 in business class seats 269 coach. Iberia has also resumed three nonstop all-year-round ...