"I'm open minded and Spain whetted my appetite. If the right opportunities came up in the major leagues I'd be interested," the 52-year-old told the BBC.
Moyes left with the Basque club in 16th place in the table, hovering above the relegation zone on goal difference, but said he enjoyed his time in La Liga, which he rates higher than the Premier League.
"I think the experience will help me. I gained great knowledge from my time there. It was great to experience what I did and I hope that will make me better," he said.
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"It's very difficult to compare the two leagues. The best teams are in Spain and many of the best players are in Spain."
(Reporting by Simon Jennings in Bengaluru. Editing by Patrick Johnston)
