Foreign transit
Foreign transit refers to the passage of foreign goods through the territory of a country, entering from one border point and exiting from another. These goods are not considered as part of the definite imports or exports of the country. For example, goods entering Iran from Turkmenistan and being loaded onto a ship at Iranian sea borders to be exported to a third country.

The meaning of transit
The term “transit” refers to the transfer of goods that have not been cleared by customs from one customs point to another, under the supervision of customs authorities. Transit is a cost-effective option for countries that are unable or less capable in producing certain goods. In simpler terms, transit refers to the sending of goods or other items that have been dispatched by the seller but have not yet reached the buyer and are still in transit.
Since transit is an international activity, every country engaging in transit with other countries must align its laws with international regulations. The field of transit of goods among different countries is highly competitive, and each country strives to competitively embed transit prices in order to achieve victory and success in international markets. If a country can effectively leverage its competitive advantages and capabilities in transit, it can bring substantial profits into its economic cycle. In fact, foreign transit companies aim to create a competitive platform to bring profits into their respective countries.
Countries seek transit with regions and countries where transit and transportation costs are cheaper for them. In other words, one of the key considerations for active countries in the international transportation sector is cheaper transportation costs. This is because a country where transportation costs are high loses its competitive advantage in the transit scene. In addition to all the aforementioned factors, countries seek foreign transit companies that can calculate all transit costs efficiently.
Of course, in the context of transit, it’s not just about international transit and international transportation. A significant portion of the transportation sector pertains to domestic transit as well.
External transit
If during the movement and transportation of goods, the shipment involves three or more countries, it is referred to as international transit. Exactly, it means that the goods pass through three or more countries from origin to destination. This is what we refer to as international transit. In these transit countries, the imported goods must enter through specified customs borders within a defined timeframe and similarly exit these countries within a specified period.

In transit to external destinations, there is a specific origin and destination. This means that export goods are sent from the customs of the origin country to the customs of the destination country, which is a foreign country.

What is airport transit?
To stop temporarily and wait for the next flight in an airport area of a country is commonly referred to as airport transit or the interval between two flights.
Airport transit essentially refers to an air transit visa for periods when there is a gap between two flights, and the transportation area at the airport is not changed. With the expansion of the aviation industry and the increasing number of air travels or transportation of goods by commercial airplanes, known as international airlines, to other countries, the matter of the gap between two flights for changing planes has become a natural and unavoidable everyday occurrence.
Transit visas, or airport visas, are themselves divided into two types: short-term and long-term. Short-term airport transit can range from one hour to several hours, while long-term transit visas typically allow stays of up to three days.