Learn Icelandic: Héðan fer sendingin með flugvél. - From here the shipment goes by airplane.

The -an suffix shows direction away from a place. While hér means 'here' (a static location), héðan means 'from here'. You will see this same pattern in words like þaðan (from there) and heiman (from home).

Why does the verb fer come before the subject sendingin?

This is because of the V2 (verb-second) rule. In Icelandic, the main verb must be the second element in a sentence. Since the adverb héðan takes the first spot, the verb fer must come next, pushing the subject sendingin to the third spot.

Why do we use með to say 'by airplane'?

While English uses 'by' for modes of transportation, Icelandic uses the preposition með (with). When used to talk about transport, með triggers the dative case for the vehicle being used.

Could I use er að fara instead of fer if the shipment is going right now?

You usually stick to the simple present fer for shipments, transport, or schedules. While er að fara (is going) exists for ongoing actions, Icelandic prefers the simple present for vehicles and logistics leaving a location, similar to saying 'the shipment leaves' in English.