Jefferson County International (0S9), Washington
Landing essentials
Whether you can land, whether you can refuel, and how customs works here.
Overview
Jefferson County International (TWD/0S9) serves Port Townsend, Washington, with a single paved runway and a low volume of business aviation traffic. The airport sits roughly 37 nautical miles from the nearest metro area and offers onsite customs inspection services despite its limited attendance schedule.
Runways
Jefferson County International has one paved runway, 09/27, 3,000 ft long and 75 ft wide, with an asphalt surface.
Helipads and surfaces under 500 ft are excluded.
Source: FAA Form 5010.
Fuel and airfield services
Jefferson County International has 100LL available on the field. Fueling is available from 9am to 6pm, daily, and the airport has no control tower.
Source: FAA Form 5010 / NASR.
Customs
Jefferson County International has US Customs and Border Protection clearance available onsite, with general clearance for international arrivals.
Source: CBP list of ports of entry.
Business aviation traffic
Jefferson County International recorded 144 business aviation movements in 2025. Traffic peaks in May. Business aviation traffic at Jefferson County Intl concentrates in the spring months, with April and May showing the highest activity of the year.
Business jet movements, FAA TFMSC count. Peak month May, 21 movements in 2025.
Source: FAA TFMSC, business jet movements, 2025.
Climate
Weather station is on the field. Some values are estimated by the agency. 1991–2020 climate normals.
Source: NOAA NCEI.
Operating constraints
Jefferson County International has published operating constraints in five categories: access, runway notes, noise procedures, environmental and other notes.
For clearance delivery, contact Whidbey Approach.
REIL is activated on Runway 09. PAPI is installed on both Runway 09 and Runway 27. MIRL serves Runway 09/27, controlled via CTAF.
The Runway 09 VGSI lights are baffled beyond 6.5 degrees left of the runway centerline due to terrain.
The Runway 27 VGSI lights are baffled beyond 6.5 degrees right of the runway centerline due to terrain.
Noise abatement procedures are in effect; contact the airport manager for details. Takeoffs and landings are prohibited on the turf area next to the runway.
Deer are present in the vicinity of the runway.
100LL fuel is available 24 hours with credit card payment. Cash sales are not accepted.
Source: FAA Chart Supplement.
Nearby airfields
Jefferson County International has five airfields within 27 NM. The closest is Coupeville Nolf (KNRA), 10.54 NM northeast.
Part of the Seattle area.
Source: Skystar calculation from official coordinates.
Skystar at 0S9
We arrange catering, fuel and trip support here. Supplier prices reach you unchanged; our coordination fee sits on its own line.
The same order, priced two ways.
$600.00 catering order at 0S9.
Unchanged.
What the kitchen invoices us is what your quote reads.
One line, fixed.
The $75 minimum applies below $862.50.
At cost.
Passed on at the exact amount the processor took.
Market practice figures are industry averages, not a specific competitor.
Frequently asked questions
Is fuel available at Jefferson County International (TWD)?
Jefferson County International, identified as TWD or 0S9, offers 100LL fuel around the clock. Purchases require a credit card, as cash sales are not accepted on the field.
Are customs services available at TWD?
Jefferson County International provides CBP inspection services onsite, allowing customs clearance directly at TWD. Dispatchers should confirm arrangements ahead of arrival given the airport's limited attendance hours.
What is the runway length at Jefferson County International?
The primary runway at Jefferson County International (TWD), designated 09/27, is a paved asphalt strip measuring 3,000 feet long and 75 feet wide. This is the only paved runway suitable for fixed-wing traffic at the field.