Tri Cities in August 2025

93.2%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 August 2025, reporting carriers scheduled 559 domestic departures from Tri Cities (PSC). 93.2% left less than 15 minutes late and 89.6% reached their destination on time; 0.5% were cancelled.

Nationally that month, 76.8% of flights departed on time and 76.3% arrived on time, so PSC departures were 16.4 points above the national departure figure.

A year earlier, in August 2024, the airport had 426 departures with 87.1% leaving on time: a change of +6.1 points, with flights up 31%.

Flights arriving at PSC that month were on time 85.3% of the time (558 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 60%, late-arriving aircraft 29% and national aviation system 5%.

On time 89.6%
Arrived 15+ minutes late 9.5%
Cancelled 0.5%
Diverted 0.4%

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

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

Measure	Aug 2025	Aug 2024	PSC, 12 months to Jul 2026	All reported flights, Aug 2025
Departed on time	93.2%	87.1%	88.0%	76.8%
Arrived on time	89.6%	84.5%	86.7%	76.3%
Cancelled	0.5%	0.0%	0.5%	1.1%
Average departure delay (late minutes only)	5.7 min	8.1 min	12.2 min	17.6 min
Scheduled departures a day	19	14	17	20,079
Scheduled departures	559	426	6,190	602,378

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	417	75%	90.2%	-6.6 min	0.0%
DL Delta Air Lines	62	11%	96.8%	-1.3 min	0.0%
AS Alaska Airlines	31	6%	74.2%	4.3 min	6.5%
UA United Airlines	31	6%	90.3%	-4.4 min	3.2%
G4 Allegiant Air	18	3%	77.8%	16.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
PSC–SEA	Pasco/Kennewick/Richland to Seattle	180	86.7%	-2.8 min	1.1%
PSC–SLC	Pasco/Kennewick/Richland to Salt Lake City	120	95.0%	-3.4 min	0.0%
PSC–DEN	Pasco/Kennewick/Richland to Denver	62	87.1%	-1.7 min	1.6%
PSC–PHX	Pasco/Kennewick/Richland to Phoenix	61	91.8%	-14.1 min	0.0%
PSC–SFO	Pasco/Kennewick/Richland to San Francisco	56	82.1%	-1.7 min	0.0%
PSC–LAX	Pasco/Kennewick/Richland to Los Angeles	31	100.0%	-18.7 min	0.0%
PSC–MSP	Pasco/Kennewick/Richland to Minneapolis	31	96.8%	-9.5 min	0.0%
PSC–AZA	Pasco/Kennewick/Richland to Phoenix	9	66.7%	22.4 min	0.0%
PSC–LAS	Pasco/Kennewick/Richland to Las Vegas	9	88.9%	10.6 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), August 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2025	Minutes
Air carrier	59.6%	33.1%	2,038
Late-arriving aircraft	29.1%	40.5%	997
National Aviation System	5.3%	19.2%	181
Extreme weather	4.5%	7.0%	154
Security	1.5%	0.1%	52

3,422 delay minutes on 53 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 August 2025?

93.2% of 559 scheduled domestic departures left less than 15 minutes late, and 89.6% reached their destination on time. The national figures that month were 76.8% and 76.3%.

How does that compare with a year earlier?

In August 2024, 87.1% of 426 departures left on time and 0.0% were cancelled, against 93.2% and 0.5% in August 2025.

Provenance

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