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.
Last updated 15 June 2017