Hello @rickfamous,

Yes, you can definitely change the search filter text through the filter and for this you need to create and activate the child theme.

To know how you can create and activate the child theme, refer to below given link:

https://wptravel.io/how-to-create-a-child-theme/

After creating the child theme, in your child theme functions.php paste below given code.

function customized_strings( $strings ) {
    $strings['trip_type'] = __( 'Your Trip type', 'wp-travel' );
    $strings['search'] = __( 'Your Search', 'wp-travel' );
    $strings['location'] = __( 'Your Location', 'wp-travel' );
    return $strings;
}
add_filter( 'wp_travel_search_filter_label_strings', 'customized_strings' ); 

Here change the text as per your requirement.

Thank you.