Charter flights can provide excellent value, and they often operate nonstop in markets where scheduled flights would be less direct. In addition, many charters don't have all of the restrictions of scheduled-service discount fares, e.g. advance-purchase, stay over a Saturday night, stay no more than 30 days, etc. Finally, most charter fares aren't "capacity-controlled" like scheduled-service discount fares; every seat on the airplane is usually available at the advertised fare. "Public Charters" can be purchased from a tour operator, a travel agent, or sometimes directly from the airline.