Seattle/Tacoma International in November 2024

86.2%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 2024, reporting carriers scheduled 12,453 domestic departures from Seattle/Tacoma International (SEA). 86.2% left less than 15 minutes late and 85.2% reached their destination on time; 0.4% were cancelled.

Nationally that month, 85.2% of flights departed on time and 84.8% arrived on time, so SEA departures were 1.0 points above the national departure figure.

A year earlier, in November 2023, the airport had 13,117 departures with 84.6% leaving on time: a change of +1.6 points, with flights down 5%.

Flights arriving at SEA that month were on time 86.1% of the time (12,451 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 41%, national aviation system 30% and late-arriving aircraft 21%.

On time 85.2%
Arrived 15+ minutes late 14.3%
Cancelled 0.4%
Diverted 0.1%

Every scheduled departure from SEA in November 2024, judged by arrival at the destination.

November 2024 against a year earlier, the airport's year and the nation

Measure	Nov 2024	Nov 2023	SEA, 12 months to Jul 2026	All reported flights, Nov 2024
Departed on time	86.2%	84.6%	78.2%	85.2%
Arrived on time	85.2%	83.0%	78.6%	84.8%
Cancelled	0.4%	0.2%	0.9%	0.5%
Average departure delay (late minutes only)	8.1 min	10.1 min	13.2 min	10.2 min
Scheduled departures a day	415	437	452	19,180
Scheduled departures	12,453	13,117	164,821	575,404

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AS Alaska Airlines	5,922	48%	82.3%	0.1 min	0.4%
DL Delta Air Lines	2,500	20%	89.8%	-6.9 min	0.2%
OO SkyWest Airlines	2,082	17%	88.7%	-3.1 min	0.2%
UA United Airlines	709	6%	87.0%	0.6 min	0.6%
WN Southwest Airlines	535	4%	87.5%	-2.7 min	0.6%
AA American Airlines	374	3%	84.5%	-3.8 min	0.8%
F9 Frontier Airlines	147	1%	72.8%	10.3 min	2.7%
NK Spirit Airlines	79	1%	75.9%	2.2 min	0.0%
HA Hawaiian Airlines	64	1%	73.4%	9.3 min	3.1%
B6 JetBlue Airways	30	0%	76.7%	0.1 min	0.0%
MQ Envoy Air	11	0%	100.0%	-19.3 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SEA–LAX	Seattle to Los Angeles	587	89.3%	-5.4 min	0.2%
SEA–PHX	Seattle to Phoenix	579	83.6%	1.6 min	0.2%
SEA–SFO	Seattle to San Francisco	548	76.3%	12.0 min	1.1%
SEA–ANC	Seattle to Anchorage	516	81.6%	-2.0 min	0.2%
SEA–LAS	Seattle to Las Vegas	515	86.4%	-1.0 min	0.4%
SEA–DEN	Seattle to Denver	485	87.8%	-3.6 min	1.0%
SEA–GEG	Seattle to Spokane	477	82.0%	2.0 min	0.2%
SEA–DFW	Seattle to Dallas/Fort Worth	424	73.8%	6.2 min	1.4%
SEA–PDX	Seattle to Portland	400	85.3%	-2.8 min	0.3%
SEA–ORD	Seattle to Chicago	357	86.8%	0.0 min	0.0%
SEA–SAN	Seattle to San Diego	353	80.7%	0.6 min	0.0%
SEA–SJC	Seattle to San Jose	352	85.5%	-1.9 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 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Nov 2024	Minutes
Air carrier	40.7%	36.9%	36,459
Late-arriving aircraft	21.4%	35.6%	19,120
National Aviation System	29.7%	21.9%	26,618
Extreme weather	8.1%	5.4%	7,240
Security	0.1%	0.2%	72

89,509 delay minutes on 1,786 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 2024?

86.2% of 12,453 scheduled domestic departures left less than 15 minutes late, and 85.2% reached their destination on time. The national figures that month were 85.2% and 84.8%.

How does that compare with a year earlier?

In November 2023, 84.6% of 13,117 departures left on time and 0.2% were cancelled, against 86.2% and 0.4% in November 2024.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for November 2024; 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.