LONDON/MADRID, Jan 25 (Reuters) - Qatar, one of the world's largest exporters of liquefied natural gas (LNG), has notified Spanish power utility Endesa of a delay to an LNG cargo due to the Red Sea conflict, two industry sources told Reuters.

Attacks in the Red Sea by Iranian-backed Houthi militias on shipping vessels are disrupting the transport of goods and commodities to European countries.

Qatar Energy recently decided to take a longer route via the Cape of Good Hope because of the conflict, and this week informed Endesa and other buyers in Europe, as well as some British terminals where it has long-term capacity, that it will delay or reschedule shipments.

"Qatar informed Endesa that there will be a delay with the tanker Al Khor. The delay will be about 10-12 days," one of the sources said.

Al Khor, a 137,354 cubic meter vessel, loaded LNG at Ras Laffan (Qatar) on January 20, and is now expected to arrive in Barcelona on February 23 after a voyage of more than a month, according to LSEG data.

Endesa declined to comment when contacted by Reuters.

Qatar Energy did not immediately respond to a Reuters request for comment outside Persian Gulf business hours.

Earlier on Thursday, the exporter said the Red Sea dispute could affect deliveries of some LNG cargoes as they take alternative routes, although shipments are being managed with buyers.

(Reporting by Marwa Rashad; edited in Spanish by José Muñoz)