...
        public ArrayList GetFly(int tip, string country)
        {
            ...
                    var list = new ArrayList();
                    var reader = command.ExecuteReader();
                    if (reader.HasRows)
                    {
                        ...
                        while (reader.Read())
                        {
                            decimal nr_zbor = reader.GetDecimal(cod_zbor);
                            string aeroport = reader.GetString(nume_aeroport);
                            string companie = reader.GetString(nume_companie);
                            list.Add(nr_zbor);
                            list.Add(companie);
                            list.Add(aeroport);
                        }
                    }
            ...

private SearchFlyClass searchFly = new SearchFlyClass();
private ArrayList fly = new ArrayList();
...
private void ShowResultFlySearch(int direction, string country)
        {
                fly = searchFly.GetFly(direction, country);
                for (int count = 0; count < fly.Count; count++)
                {
                    string zbor = fly[0].ToString();
                    string companie = fly[1].ToString();
                    string aeroport = fly[2].ToString();
                    ListViewItem searchlist = new ListViewItem();
                    searchlist.Items.Add(new ListViewItem(elem));

                }
        }

ListView listView = new ListView();
listView.View = View.Details;

listView.Columns.Add("zbor");
listView.Columns.Add("airport");
listView.Columns.Add("company");

private void ShowResultFlySearch(int direction, string country)
{
    fly = searchFly.GetFly(direction, country);

    for (int count = 0; count < fly.Count; count++)
    {
        string zbor = fly[0].ToString();
        string companie = fly[1].ToString();
        string aeroport = fly[2].ToString();

        ListViewItem listViewItem = new ListViewItem(zbor);
        listViewItem.SubItems.Add(airport);
        listViewItem.SubItems.Add(companie);

        listView.Items.Add (listViewItem);
    }
}

public class Flight
{
   public decimal Code { get; set; }
   public string Company { get; set; }
   public string Airport { get; set; }
}

public Flight GetFlight(int tip, string country)

var flight = new Flight();
flight.Code = reader.GetDecimal(cod_zbor);
flight.Airport = reader.GetString(nume_aeroport);
flight.Company = reader.GetString(nume_companie);
return flight;

var flight = searchFly.GetFlight(...);
// access flight properties here