Are there domestic flights in Guatemala?
Although it's a small country, there are domestic flights in Guatemala.
Domestic flights within Guatemala are fairly straight forward. There are only three airports open to passenger flights within the country, one in each of Guatemala City, Flores and Puerto Barrios.
There are only two direct domestic routes in Guatemala:
Guatemala City ➡ Flores
Guatemala City ➡ Puerto Barrios
Anyone that wants to fly between Flores and Puerto Barrios would have to connect via Guatemala City:
Flores ➡ Guatemala City ➡ Puerto Barrios