CLE has probably the slickest Web site I’ve seen. Postal facilities are run-of-the-mill.
There’s one mail drop pre-security: check for an in-the-wall mail slot near Security Checkpoint A and by the Spirit Airlines check-in counter. Unfortunately the terminal map is no help, but it should be easy to find given that it’s near a labeled Security Checkpoint.
Note that they seem to collect this super late (10:45pm Monday-Saturday excluding Federal Holidays), so there’s a bonus if you’re headed there for a late-night flight out.
Robert updated that there is a silver mailbox on the wall prior to the north security checkpoint. Pickup time was listed at 10.45, but no notation if it was AM or PM.
Last updated 22 November 2021