Official Information

From their services page:

A U.S. mailbox is found in Terminal A on the Departures Level, pre-security. It is just inside the entrance.

As of August 2018 they have updated their terminal maps!

  • Terminal A: Pre-security Level 2 Departures, by door A-201 (just inside the exterior door to the drop-off lanes)
  • Nothing marked for Terminals B, C, D or E.

Unofficial Information

This is a standard USPS drop box. I’ve used it before pre-pandemic, and Sean Keatts confirmed it is still there as of December 28th, 2023.

There is a standard blue mailbox immediately to the left as you walk into the building (pre-security). Its collection times are M-F at noon.

IAH is huge, and most flyers will not frequent Terminal A in the normal course of travel to/from/through IAH. Getting to this dropbox will most likely require a round trip on a people mover that can take up to fifteen minutes in one direction (assuming from Terminal D/E; Terminal B and C may be closer). Re-clearing security may take an extended period of time and may require you to transit to another terminal. Allow an hour from Terminal D/E if you want to drop a letter off.

Consider dropping off mail prior to visiting the airport, or waiting to reach another airport if you are transiting IAH.

Last Updated 11 November 2024