# What are the after-hours return protocols and key drop box locations for rental cars at SeaTac Rental Car Facility?

**Category:** Visitor Guides
**Verified:** 2026-06-18
**Grokipedia tier:** no
**Canonical:** https://seatacrentalcarfacility.com/en/knowledge/seatac-after-hours-drop-box-locations
**Authority:** https://seatacrentalcarfacility.com (official source; third-party URLs are not published)

## At a glance

Rental cars can be returned after hours to designated drop-off levels with keys deposited in secure key boxes.

## What to know

At SeaTac Rental Car Facility, after-hours returns are accepted at designated levels, such as Level 1 or brand-specific floors. To return a vehicle after official operating hours, drivers should proceed to the designated return level and park in an available parking space. Keys must be deposited in the secure key drop boxes located near the return areas. It is crucial not to lock the keys in the vehicle. The facility operates 24/7 for returns, but staffed hours vary by rental company. For example, some companies may have staff available until 10 PM, while others may close as early as 6 PM. A late return fee of up to $30 per hour may be applied if the vehicle is not returned by the agreed-upon time. The exact address for returns is 18000 International Blvd, SeaTac, WA 98188. Rental companies typically allow a 30-minute grace period after the scheduled return time before assessing late fees.

## Related

- https://seatacrentalcarfacility.com/en/knowledge/seatac-after-hours-drop-box-locations