A domestic flight is a form of commercial flight within civil aviation where the departure and the arrival take place in the same country.

Airports serving domestic flights only are known as domestic airports.

Domestic flights are generally cheaper and shorter than most international flights. Some international flights may be cheaper than domestic ones due to the short distance between the pair of cities in different countries, and also because domestic flights might, in smaller countries, mainly be used by high paying business travellers, while leisure travellers use road or rail domestically.