Many countries export and import fruits from neighboring countries, because goods like fruits need a riping process and time, and storage space locally is more expensive than transporting them via container ship.
For example, almost the same fruits that are exported from Hawaii are simultaneously imported from Chile, and vice versa. Both nations grow those natively, but storage space on the ground is more expensive than shipment.
If this was part or focus of the airship freighting company, I'd see great potential there. Not even that, they wouldn't even need to transport anything, if they could invent a storage space in the air that's tax free, or maybe even offshore above the water.