Ask your carrier about this. If you're using a forwarder who arranges transport of your freight on more than one carrier, ask about the reliability of connections and time estimates for each transfer point. For example, how long should you calculate for truck transport to Chicago's O'Hare International Airport then airfreight from O'Hare to Atlanta. Know your carrier's backup plan in case a flight or a connection is missed. If the destination is far from the point of origin or reached by a variety of carriers, allow several extra days for unanticipated delays.
International delivery requires extra allowances.
Customs clearance can take up to two days after the item arrives in the country of destination, and customs facilities generally operate only Monday through Friday. As a rule, do not guarantee any delivery dates to international residential customers. Instead, stress that the delivery window is based on an estimate. You can specify this on your Web site in shipping details for international customers. Cultural customs and national holidays in other countries must be considered as well.