Seattle/Tacoma International in November 2023

84.6%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In November 2023, reporting carriers scheduled 13,117 domestic departures from Seattle/Tacoma International (SEA). 84.6% left less than 15 minutes late and 83.0% reached their destination on time; 0.2% were cancelled.

Nationally that month, 86.0% of flights departed on time and 86.2% arrived on time, so SEA departures were 1.4 points below the national departure figure.

Flights arriving at SEA that month were on time 85.5% of the time (13,106 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 43%, late-arriving aircraft 21% and national aviation system 19%.

On time 83.0%
Arrived 15+ minutes late 16.7%
Cancelled 0.2%
Diverted 0.2%

Every scheduled departure from SEA in November 2023, judged by arrival at the destination.

November 2023 against a year earlier, the airport's year and the nation

Measure	Nov 2023	Year earlier	SEA, 12 months to Jul 2026	All reported flights, Nov 2023
Departed on time	84.6%	—	78.2%	86.0%
Arrived on time	83.0%	—	78.6%	86.2%
Cancelled	0.2%	—	0.9%	0.1%
Average departure delay (late minutes only)	10.1 min	—	13.2 min	9.4 min
Scheduled departures a day	437	—	452	18,793
Scheduled departures	13,117	—	164,821	563,777

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AS Alaska Airlines	6,269	48%	81.6%	0.5 min	0.1%
DL Delta Air Lines	2,619	20%	85.8%	-2.1 min	0.0%
OO SkyWest Airlines	2,124	16%	83.8%	6.7 min	0.5%
UA United Airlines	679	5%	87.8%	0.0 min	0.1%
WN Southwest Airlines	640	5%	80.8%	2.8 min	0.0%
AA American Airlines	478	4%	82.6%	12.0 min	0.2%
F9 Frontier Airlines	102	1%	79.4%	2.8 min	0.0%
NK Spirit Airlines	75	1%	89.3%	1.1 min	0.0%
B6 JetBlue Airways	67	1%	76.1%	18.3 min	0.0%
HA Hawaiian Airlines	60	0%	56.7%	19.9 min	1.7%
MQ Envoy Air	4	0%	50.0%	20.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SEA–LAX	Seattle to Los Angeles	612	82.8%	2.0 min	0.2%
SEA–LAS	Seattle to Las Vegas	589	83.0%	3.3 min	0.0%
SEA–PHX	Seattle to Phoenix	571	80.7%	3.7 min	0.0%
SEA–ANC	Seattle to Anchorage	559	79.1%	-0.3 min	0.2%
SEA–DEN	Seattle to Denver	520	85.6%	1.0 min	0.0%
SEA–SFO	Seattle to San Francisco	517	80.7%	5.9 min	0.0%
SEA–PDX	Seattle to Portland	516	82.0%	4.9 min	0.0%
SEA–GEG	Seattle to Spokane	435	82.8%	10.3 min	0.2%
SEA–SNA	Seattle to Santa Ana	375	82.9%	-0.7 min	0.0%
SEA–SAN	Seattle to San Diego	374	83.2%	-1.0 min	0.0%
SEA–ORD	Seattle to Chicago	363	87.1%	3.0 min	0.0%
SEA–SJC	Seattle to San Jose	363	82.4%	3.7 min	0.0%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), November 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Nov 2023	Minutes
Air carrier	43.0%	42.5%	51,178
Late-arriving aircraft	21.3%	37.3%	25,343
National Aviation System	19.4%	16.2%	23,107
Extreme weather	16.1%	3.7%	19,215
Security	0.3%	0.3%	312

119,155 delay minutes on 2,184 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left SEA on time in November 2023?

84.6% of 13,117 scheduled domestic departures left less than 15 minutes late, and 83.0% reached their destination on time. The national figures that month were 86.0% and 86.2%.

How does that compare with a year earlier?

November 2022 is outside the 36 months on file, or the airport had too few reported flights that month.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for November 2023; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for SEA · methodology · corrections.