This is the 1424th most frequent Dutch word.
binnenlandse
"Domestic" or "internal."
In this sentence, 'binnenlandse' modifies 'politiek' (politics), describing it as related to the internal affairs of a country.
De binnenlandse politiek is vaak complex.
Domestic politics are often complex.
Here, 'binnenlandse' is used to describe 'vluchten' (flights), indicating they take place within the country.
Binnenlandse vluchten zijn vaak korter dan internationale vluchten.
Domestic flights are often shorter than international flights.
The term 'binnenlandse' in this sentence relates to 'wetgevingen' (legislations), specifying them as pertaining to internal affairs of the state.