The FAQ gives the address to the nearest full-service post office:
The nearest full service post office is located at 8401 Boeing.
Checking via Google Maps, that’s a good mile away, so a 15-20 minute walk (assuming it’s a safe walk with sidewalks).
Robert submitted the location of a drop box:
Lobby between ticket counter and baggage claim
ELP isn’t that large, so I guess it’s right inside the main entrance as you head to the security checkpoint. The Information Desk is in the area so you may want to ask them where the drop box is if you can’t find it
Last updated 19 August 2018