- Mompos, also known as Mompós or Santa Cruz de Mompox, is a town in Colombia located on an island in the Magdalena River. However, it does not have its own airport. The closest airports to Mompos are the Rafael Núñez International Airport in Cartagena and the Ernesto Cortissoz International Airport in Barranquilla. From either of these airports, you would need to travel by road or boat to reach Mompos.