A domestic flight is a commercial flight that takes place entirely within the borders of a single country, with both the departure and arrival occurring at airports located within the same country

. These flights are usually shorter in duration and distance compared to international flights and often cost less as a result

. Domestic flights use domestic terminals at airports, and passengers typically do not need to go through customs or immigration checks, though security screening for identity and baggage still applies

. Identification requirements for domestic flights vary by country but generally include government-issued IDs rather than passports for citizens flying within their own country

. In summary, domestic flights are internal flights connecting cities or regions within one country, providing a faster alternative to other modes of domestic travel such as road or rail, especially over longer distances