My 1990 Honda accord has almost no airflow on any setting heat/cold/fresh/recirc/a/c.
Does anybody have any ideas?

. Check all under-hood and under-dash fuses with a test light or multimeter. Here's how:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-46563-3.html#post252145

A blown blower motor fuse or bad blower motor relay may be the problem. Check for both of these first in the under-hood fuse/relay box.

. Check for vacuum hose leak that controls air ducts.