How do I return to the SeaTac Rental Car Facility using local highways (I-5, SR-518, SR-509, I-405) with specific lane guidance for exiting to International Blvd/SR 99 South or Air Cargo Rd?

When returning your vehicle to the SeaTac Rental Car Facility via regional highways, precise lane positioning is crucial for a seamless transition. If approaching from the north or south on I-5, take Exit 154B for SR-518 West toward Burien. Immediately upon merging onto SR-518, move into the right 2 lanes. After approximately 1. 5 miles, SR-518 intersects with SR-509; maintain your right lane position through this interchange. If arriving from the east via I-405, transition onto SR-518 West and similarly position your vehicle in the right 2 lanes as you approach the SeaTac area. As you continue westbound, take the exit marked for International Blvd/SR 99 South and Air Cargo Rd. The exit ramp splits into two distinct vectors. For the most direct facility access, bear right onto Air Cargo Rd. You will pass the 3150 S 160th St checkpoint within 0. Alternatively, if taking the International Blvd/SR 99 South route, stay in the far right lane on the overpass, turn right at the traffic light, and proceed south for 0. 8 miles before turning right onto 24th Ave S, which leads directly into the return lot. Both routes feature dedicated return signage, but staying in the right 2 lanes on SR-518 and SR-509 is essential to avoid missing the split exit ramp.