runwayinuse

KSEA Seattle-Tacoma Intl

34R
CONFIRMED 99%

Runways 34R and 34L — assigned by ATIS (information J)

certainty: 99% evidence: STRONG towered now Class B

N 34R 16L 34L 16R 16C 34C

Wind 060° true at 5 kt · VFR · 14 min old

▶ Listen live — ATIS/CTAF on LiveATC opens LiveATC’s own player · verify the broadcast yourself

34R 76% 11901 ft · 2 kt head, 4 kt x-right
34L 24% 8500 ft · 2 kt head, 4 kt x-right
16R <1% 8500 ft · 2 kt TAIL, 4 kt x-left
16L <1% 11901 ft · 2 kt TAIL, 4 kt x-left
16C CLOSED 9426 ft · 2 kt TAIL, 4 kt x-left
34C CLOSED 9426 ft · 2 kt head, 4 kt x-right

Active NOTAMs affecting runways

RWY CLOSED RWY 16C/34C until 11-21 01:00Z 
RWY 16C/34C CLSD EXC TAX BTN TWY M AND TWY P AND XNG
APCH OTS RWY 16C until 11-20 23:00Z 
NAV ILS RWY 16C CAT II NA
LIGHTING RWY 16C until 11-20 23:00Z 
RWY 16C ALS U/S
LIGHTING RWY 16C until 11-20 23:00Z 
RWY 16C PAPI U/S
APCH OTS RWY 16C until 11-20 23:00Z 
NAV ILS RWY 16C U/S
LIGHTING RWY 34C until 11-20 23:00Z 
RWY 34C PAPI U/S
LIGHTING RWY 34C until 11-20 23:00Z 
RWY 34C ALS U/S
APCH OTS RWY 34C until 11-20 23:00Z 
NAV ILS RWY 34C U/S
Why — evidence behind this answer

Runway 34R

Runway 34L

Runway 16R

Runway 16L

Runway 16C

Runway 34C

Sources consulted

sourcestatus agenote
D_ATISOK 13 min
METAROK 14 min
ADSBOK 0 min GOOD
NOTAMOK
CIFPNOT_CONFIGURED Instrument procedures: phase 4

Recent operations

No operations observed in the last hour.

Was this right?

KSEA field & runways

Seattle-Tacoma Intl, Seattle, Washington. Field elevation 432 ft. Class B airspace. Towered. Magnetic variation 16.0°E on record, 14.8°E today.

The FAA's variation of record is the number this field was surveyed against; the second is where north points now, from WMM2025. It is moving 0.123°/year west — about 1° every 8 years — which is why runway numbers eventually stop matching their pavement.

Runway data from the FAA NASR 01 Oct 2026 cycle. Where NASR locates both thresholds, the true heading is the bearing between them rather than NASR's whole-degree alignment. Magnetic is that heading against today's declination from WMM2025, not the field's variation of record — so it can differ from the chart by the gap between the two shown above. The number painted on the runway is the one ATC uses.
RunwayTrueMagnetic Number LengthSurfacePattern Notes
16C 180.3° 165.5° runway 17 by the rule today · 5.5° past 9,426 ft CONC left ILS CLOSED
16L 180.3° 165.5° runway 17 by the rule today · 5.5° past 11,901 ft CONC ILS
16R 180.3° 165.5° runway 17 by the rule today · 5.5° past 8,500 ft CONC ILS
34C 0.3° 345.5° runway 35 by the rule today · 5.5° past 9,426 ft CONC left ILS CLOSED
34L 0.3° 345.5° runway 35 by the rule today · 5.5° past 8,500 ft CONC ILS
34R 0.3° 345.5° runway 35 by the rule today · 5.5° past 11,901 ft CONC ILS

What KSEA usually does

Of 50,180 operations this service has observed at KSEA since 2026-08-23:

Observed by this service only — not an FAA statistic, and biased toward the hours and days it has been watching. It is shown because it is the same history the engine learns its local-convention prior from.

Generated 10:07:11Z · auto-refreshes · JSON