Comparing a field with several values at once using meta_query (WP)

I’m comparing the trip_region custom field of my trip CPT to the first element of an array: $filter_region[0].

Howevere I may have more elements in that array and I need to select trips whose trip_region field equals any of these elements. Is it possible, with meta_query, to compare (with an OR, not an AND) a field to several values at once? Because there’s nothing quite like that in the doc.

$get_trips_region = get_posts(array(
    'post_type' => 'trip',
    'meta_query' => array(
        array(
            'key' => 'trip_region', 
            'value' => '"' . $filter_region[0] . '"', 
            'compare' => 'LIKE'
        )
    )
));

EDIT:

Here’s my new code, presumably closer to the solution but doesn’t return any result:

$get_trips_region = get_posts(array(
    'post_type' => 'trip',
    'meta_query' => array(
        array(
            'key' => 'trip_region', 
            'value' => $filter_region, 
            'compare' => 'IN'
        )
    )
));

EDIT(2):

Replacing get_posts with WP_Query and using WP_Query’s request property I see the following SQL query is being executed here:

SELECT SQL_CALC_FOUND_ROWS wp_15_posts.ID FROM wp_15_posts INNER JOIN wp_15_postmeta ON (wp_15_posts.ID = wp_15_postmeta.post_id) WHERE 1=1 AND wp_15_posts.post_type = 'trip' AND (wp_15_posts.post_status = 'publish' OR wp_15_posts.post_status = 'private') AND ( (wp_15_postmeta.meta_key = 'trip_region' AND CAST(wp_15_postmeta.meta_value AS CHAR) IN ('47','46','45')) ) GROUP BY wp_15_posts.ID ORDER BY wp_15_posts.post_date DESC LIMIT 0, 10

Relevant passage I guess is: (wp_15_postmeta.meta_key = 'trip_region' AND CAST(wp_15_postmeta.meta_value AS CHAR) IN ('47','46','45'))

Looks good to me, I don’t understand why it doesn’t work.