Scheduled flights are flights operated by airlines throughout the year according to a fixed schedule. They typically involve flights to major airports. A scheduled flight operates even if it is not fully booked and there are still many seats available. Since these flights are generally conducted on a fixed schedule, advance flight permission is not required.
Charter flights, on the other hand, are flights conducted based on agreements between airlines and tourism service providers. These are usually seasonal flights to popular travel destinations. Typically, these are flights for a period of up to one week to relatively nearby destinations (up to 5 hours of flight time), without a commitment to exact flight times.