> Edit: I'm not sure about 64 km. The 64km is for the Curaçao departing flight, but Curaçao's airport is itself 80 km from Venezuela, and they headed north pretty immediately? I.e., … they would have never been < 80 km…?

If you take off from Curaçao and head like 10km west before you've actually left the island, you end up pretty much within 64km of Adicora, Venezuela. Probably what they meant I guess.