I found there is only flight a day between the two, and since that flight is fully booked for my dates, I am looking for another way to travel between the two cities.
What my other transport options between the two cities?
Transport options are normally air, rail, road or sea. For air there are alternative, though indirect, routes (eg via Maputo or J'burg). Rail seems out of the question. By road there is public transport, but slow, complicated and uncomfortable, or taxi. By sea could be slow and expensive and would require negotiation since there is no ferry link. I take it on foot does not count as a transportation option.