Airlines at Seattle–Tacoma International Airport (SEA)

Seattle, Washington KSEA #12 US airport by passengers

Airlines operating at SEA, ranked by number of departures.

On-time performance at SEA

Based on 46,180 departures from May 2026 to July 2026. A flight counts as late when it leaves 15 or more minutes after schedule.

24.0%Departures late

21.1%Arrivals late

0.62%Cancelled

14.7 minAverage departure delay

On-time performance by airline at SEA
Airline	Departures	Late	Cancelled
Alaska Airlines	21,557	26.0%	0.45%
Delta Air Lines	8,780	18.7%	0.80%
SkyWest Airlines	7,633	15.5%	0.21%
United Airlines	2,709	24.3%	0.85%
Southwest Airlines	2,510	45.0%	0.24%
American Airlines	2,058	28.8%	1.36%
Frontier Airlines	398	23.6%	1.51%
Envoy Air	327	17.7%	0.00%
JetBlue Airways	208	63.5%	5.29%

Source: Bureau of Transportation Statistics, On-Time Performance of reporting carriers. Smaller regional carriers and some airlines are not included.

Alaska Airlines has its main hub here and Delta operates a large presence. International carriers from Asia and Europe serve the airport too.