Tri Cities in September 2025

91.4%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 September 2025, reporting carriers scheduled 488 domestic departures from Tri Cities (PSC). 91.4% left less than 15 minutes late and 91.2% reached their destination on time; 0.0% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so PSC departures were 8.3 points above the national departure figure.

A year earlier, in September 2024, the airport had 424 departures with 88.4% leaving on time: a change of +3.0 points, with flights up 15%.

Flights arriving at PSC that month were on time 87.9% of the time (489 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 51%, extreme weather 29% and late-arriving aircraft 10%.

On time 91.2%
Arrived 15+ minutes late 8.8%
Cancelled 0.0%
Diverted 0.0%

Every scheduled departure from PSC in September 2025, judged by arrival at the destination.

September 2025 against a year earlier, the airport's year and the nation

Measure	Sep 2025	Sep 2024	PSC, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	91.4%	88.4%	88.0%	83.1%
Arrived on time	91.2%	87.7%	86.7%	82.8%
Cancelled	0.0%	0.2%	0.5%	0.5%
Average departure delay (late minutes only)	9.4 min	10.2 min	12.2 min	12.2 min
Scheduled departures a day	16	14	17	18,748
Scheduled departures	488	424	6,190	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	351	72%	93.2%	-7.0 min	0.0%
DL Delta Air Lines	60	12%	91.7%	4.7 min	0.0%
AS Alaska Airlines	30	6%	80.0%	-0.8 min	0.0%
UA United Airlines	30	6%	90.0%	-6.6 min	0.0%
G4 Allegiant Air	17	3%	70.6%	80.2 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
PSC–SEA	Pasco/Kennewick/Richland to Seattle	167	88.0%	-4.7 min	0.0%
PSC–SLC	Pasco/Kennewick/Richland to Salt Lake City	92	97.8%	-8.9 min	0.0%
PSC–DEN	Pasco/Kennewick/Richland to Denver	60	91.7%	-8.4 min	0.0%
PSC–SFO	Pasco/Kennewick/Richland to San Francisco	49	93.9%	-6.4 min	0.0%
PSC–PHX	Pasco/Kennewick/Richland to Phoenix	43	93.0%	2.2 min	0.0%
PSC–LAX	Pasco/Kennewick/Richland to Los Angeles	30	96.7%	-18.8 min	0.0%
PSC–MSP	Pasco/Kennewick/Richland to Minneapolis	30	86.7%	16.5 min	0.0%
PSC–LAS	Pasco/Kennewick/Richland to Las Vegas	9	55.6%	143.7 min	0.0%
PSC–AZA	Pasco/Kennewick/Richland to Phoenix	8	87.5%	8.9 min	0.0%

By scheduled departure hour

100

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

Share of departures that left less than 15 minutes late, by scheduled hour (local time), September 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2025	Minutes
Air carrier	50.5%	34.3%	2,147
Late-arriving aircraft	10.4%	37.4%	443
National Aviation System	10.1%	22.6%	430
Extreme weather	29.0%	5.6%	1,233
Security	0.0%	0.1%	0

4,253 delay minutes on 43 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 PSC on time in September 2025?

91.4% of 488 scheduled domestic departures left less than 15 minutes late, and 91.2% reached their destination on time. The national figures that month were 83.1% and 82.8%.

How does that compare with a year earlier?

In September 2024, 88.4% of 424 departures left on time and 0.2% were cancelled, against 91.4% and 0.0% in September 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for PSC · methodology · corrections.