The fiancé(e) K-1 nonimmigrant visa is for the foreign-citizen fiancé(e) of a U.S. citizen. The K-1 visa permits the foreign-citizen fiancé(e) to travel to the United States and marry his or her U.S. citizen sponsor within 90 days of arrival. You can learn more about fiancé(e) visas on usvisas.state.gov.
Nonimmigrant visa for fiancé(e) (K-1)- To travel to the United States for marriage. An I-129F Fiancé(e) Petition is required.