Seattle Airport ZIP Code: 98158 Guide for Travelers

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Seattle-Tacoma International Airport is located in ZIP code 98158, in the city of SeaTac, King County, Washington. The airport's main passenger terminal address is 17801 International Blvd, SeaTac, WA 98158. This ZIP code covers the airport campus itself, including the main terminal, parking garage, and most on-airport facilities. A second ZIP code — 98188 — covers the broader SeaTac area and applies to some nearby hotels and businesses along International Blvd.

• Primary airport ZIP code: 98158 (main terminal, parking garage, Port of Seattle facilities)
• Secondary area ZIP code: 98188 (broader SeaTac neighborhood, some hotels and off-site lots)
• Full mailing address: 17801 International Blvd, SeaTac, WA 98158
• IATA code: SEA | ICAO code: KSEA | County: King County
• Distance from downtown Seattle: 14 miles south, roughly 25-45 minutes by car on I-5
• Off-site parking near SEA starts from $12.95/day — compare lots before you book

What Is the ZIP Code for Seattle-Tacoma International Airport (SEA)?

The ZIP code for Seattle-Tacoma International Airport is 98158. This is the primary postal code assigned to the airport campus and is the one to use on forms, shipping labels, and travel bookings. The Port of Seattle, which operates SEA, uses this ZIP code for all official airport correspondence.

The full address for the main passenger terminal is 17801 International Blvd, SeaTac, WA 98158. International Blvd is also known as Pacific Highway South (SR-99), the north-south arterial that runs directly alongside the airport. This road connects directly to Interstate 5 via State Route 518, making it easy to reach from Seattle, Tacoma, and the Eastside.

SEA is operated by the Port of Seattle and is the largest airport in the Pacific Northwest. It serves all major domestic and international carriers, including Alaska Airlines, Delta Air Lines, Southwest Airlines, and many others across six concourses. The airport's IATA code is SEA and ICAO code is KSEA — both used in flight tracking and booking systems.

Ready to compare SEA parking options before your trip? Compare off-site SEA Airport parking lots starting at $12.95/day on Triply — all include free 24/7 shuttle service.

When Should You Use ZIP Code 98158 vs. 98188 for SeaTac Airport?

Use 98158 when filling out forms or entering an address that specifically refers to the airport terminal, parking garage, or official Port of Seattle facilities. Use 98188 when searching for nearby hotels, restaurants, or off-site businesses in the broader SeaTac neighborhood.

Here's a practical breakdown of when each ZIP code applies:

ZIP Code 98158 — Use This For:

• Mailing packages or documents to the airport's administrative offices
• Filling in your destination on a car rental form
• Entering the airport address in a navigation app (Google Maps, Apple Maps)
• Completing online parking reservation forms that ask for the airport ZIP
• TSA PreCheck or CLEAR enrollment forms that request your departure airport ZIP
• Corporate travel booking systems requiring a destination ZIP
• Confirming your destination with a rideshare driver

ZIP Code 98188 — Use This For:

• Hotels along International Blvd or nearby streets (not on the airport campus)
• Some off-site parking facilities located a few blocks from the airport perimeter
• Restaurants and retail businesses in the SeaTac commercial corridor
• Residential addresses in the surrounding SeaTac community
• Searching Google Maps for businesses in the general airport area

The practical rule is simple: if your destination is inside the airport fence — terminal, garage, rental car center — use 98158. If you're heading to a business a few blocks away on International Blvd, the address may fall in 98188. Always verify with the specific business before you go.

Where Exactly Is Seattle Airport Located? Address, County, and Map

Seattle-Tacoma International Airport is located in SeaTac, Washington, a city in King County. The main terminal sits along International Blvd (SR-99), approximately 14 miles south of downtown Seattle.

The airport sits between the cities of Tukwila to the north and Des Moines to the south, with Burien to the west. From downtown Seattle (ZIP 98101), it's a straight shot south on I-5. You can also reach the airport via SR-509 from West Seattle or Burien, or via I-405 and SR-518 from Bellevue and Renton on the Eastside.

The airport is in King County, which is important for tax purposes. Washington has no state income tax, but King County does levy sales and parking taxes. On-airport parking is managed by the Port of Seattle, so the posted rates ($32/day for General Parking, $39/day for Reserved Parking on Floor 4) include all applicable fees per the Port of Seattle's official parking rate schedule (verified April 2026).

How to Use the SEA Airport ZIP Code for Rideshare, Rental Cars, and Hotel Bookings

The most practical reason travelers look up the Seattle airport ZIP code is to complete a booking form or navigate to the airport. Each use case has a slightly different address requirement.

Rideshare Apps (Uber and Lyft)

Both Uber and Lyft have dedicated pickup and dropoff zones at SEA. You don't need to type the ZIP manually — just search "Seattle-Tacoma International Airport" or "SEA Airport" in the app. The apps are pre-programmed with the correct terminal coordinates. Rideshare pickup for arriving passengers is on the 3rd floor of the parking garage, in the designated app-based rideshare zone. If you ever need to type an address manually, use 17801 International Blvd, SeaTac, WA 98158.

Rental Car Center

The rental car facility at SEA is connected to the main parking garage. A free rental car shuttle runs 24/7 from the 1st floor of the parking garage to the consolidated rental car center. If a rental car form asks for a return location ZIP, use 98158. The SEA rental car center is on the airport campus and shares the 98158 ZIP code.

Hotel Bookings Near the Airport

Hotels on the airport campus or immediately adjacent to it typically fall under 98158. Hotels a few blocks south or east along International Blvd may have a 98188 address. When booking, always use the hotel's actual listed address — don't assume either ZIP applies. For park-and-fly hotel deals, check our guide to hotels near Seattle Airport with free parking, which covers exact addresses for the top SeaTac park-and-fly properties.

Navigation Apps

For Google Maps or Apple Maps, searching "Seattle-Tacoma International Airport" will take you directly to the terminal. If you're driving and want to monitor I-5 congestion, you can also check real-time traffic on Waze before heading out — useful during peak hours or when the SEA Gateway Project roadwork causes temporary detours in 2026.

Parking Reservation Forms

When booking off-site parking through a provider or comparison site, forms may ask for your destination airport ZIP. Always enter 98158. This ensures the system matches you to lots near the correct terminal, not a different SeaTac address.

What Are the ZIP Codes for Parking Lots and Garages Near SEA Airport?

The on-airport parking garage at SEA sits on the airport campus and uses ZIP code 98158. Off-site parking lots are scattered along International Blvd (SR-99) and nearby streets, and most fall within either 98158 or 98188, depending on their exact location.

Here's a comparison of the major SEA parking options by location and daily rate (verified April 2026):

Off-site lots along International Blvd often fall under 98188, though some properties near the northern edge of the airport campus may be in 98158. Doug Fox Airport Parking is the closest off-site lot to SEA — just a 3-minute shuttle ride — and sits near the boundary between the two ZIP codes. Always check the lot's listed address when booking.

Off-site parking can save you up to 60% compared to on-airport rates. For a full breakdown of costs and shuttle details, see our guide to Seattle Airport off-site parking lots and rates.

Nearby ZIP Codes to Seattle Airport and What They Cover

Several ZIP codes surround the SEA airport campus. Knowing which neighborhoods and services fall under each code helps you plan hotel stays, ground transport, and parking more precisely.

The Link Light Rail 1 Line connects downtown Seattle (ZIP 98101) directly to SEA Airport (ZIP 98158) in about 38 minutes for $3.00. This is one of the most affordable and reliable ways to reach the airport from Capitol Hill, the University District, or Northgate. For travelers coming from Bellevue or the Eastside, Sound Transit Express Bus Route 560 connects via SR-518 and I-405.

If you're planning a multi-day trip and want to avoid airport parking costs entirely, the Light Rail is a strong option. But for longer trips — especially anything over 4 days — off-site parking lots in the 98188 ZIP corridor often come out cheaper than repeated Uber or Lyft fares. Our guide to Seattle Airport long-term parking rates and best lots breaks down the math by trip length.

2026 Construction at SEA: Does It Affect the Airport Address or ZIP?

The airport's ZIP code and address do not change due to construction. However, active Sustainable Airport Master Plan (SAMP) projects may affect traffic flow and access routes near ZIP codes 98158 and 98188 in 2026.

Key projects underway include:

• SEA Gateway Project — Roadway and terminal frontage improvements along International Blvd. Targeting completion in 2026. Some temporary detours possible near the terminal entrance in ZIP 98158.
• C Concourse Expansion ($260M) — Adding 10+ restaurants, new retail, and an airside observation deck. Substantial completion targeted for Q2 2026. Inside the terminal only — no impact on parking or road access.
• Ground Transportation Center — A new consolidated facility for buses, shuttles, and transit. Part of SAMP near-term projects. Will improve connections for travelers using off-site lots in ZIP 98188.
• New Second Terminal (19 gates) — FAA-approved, 575,000 sq ft structure with a 1,350-space garage. Long-term project targeting 56 million passengers annually by 2032. A new address and possibly a new ZIP code may apply when complete.

The main parking garage remains fully operational during all current construction phases, per the Port of Seattle. The garage holds approximately 13,000 vehicles and connects to all concourses via skybridge. For the latest construction impact updates, the Port of Seattle SAMP page has current project timelines.

Ready to Book SEA Airport Parking Near ZIP Code 98158?

Now that you know the Seattle airport ZIP code is 98158 — and when to use 98188 for nearby lots and hotels — you have everything you need to fill out forms, navigate apps, and plan your trip accurately.

Off-site parking lots in the ZIP 98188 corridor start at just $12.95/day and include free 24/7 shuttle service to the terminal. That's compared to $32/day for on-airport General Parking in ZIP 98158 — a savings of up to 60%. For a 7-day trip, that difference adds up to over $130 in potential savings.

Compare SEA Airport parking lots starting at $12.95/day on Triply — side-by-side rates, shuttle times, and free cancellation on most bookings.