Tri Cities in December 2025

87.5%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 December 2025, reporting carriers scheduled 567 domestic departures from Tri Cities (PSC). 87.5% left less than 15 minutes late and 87.5% reached their destination on time; 0.5% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so PSC departures were 15.5 points above the national departure figure.

A year earlier, in December 2024, the airport had 567 departures with 84.7% leaving on time: a change of +2.8 points, with flights up 0%.

Flights arriving at PSC that month were on time 80.3% of the time (568 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 63%, national aviation system 14% and late-arriving aircraft 12%.

On time 87.5%
Arrived 15+ minutes late 11.5%
Cancelled 0.5%
Diverted 0.5%

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

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

Measure	Dec 2025	Dec 2024	PSC, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	87.5%	84.7%	88.0%	72.0%
Arrived on time	87.5%	82.2%	86.7%	71.9%
Cancelled	0.5%	0.4%	0.5%	1.5%
Average departure delay (late minutes only)	12.3 min	15.6 min	12.2 min	21.2 min
Scheduled departures a day	19	19	17	19,410
Scheduled departures	567	567	6,190	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	390	69%	89.2%	-3.8 min	0.5%
AS Alaska Airlines	56	10%	73.2%	6.8 min	0.0%
DL Delta Air Lines	50	9%	96.0%	2.4 min	0.0%
G4 Allegiant Air	40	7%	80.0%	-0.8 min	0.0%
UA United Airlines	31	5%	87.1%	-14.2 min	3.2%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
PSC–SEA	Pasco/Kennewick/Richland to Seattle	159	87.4%	3.5 min	0.0%
PSC–SLC	Pasco/Kennewick/Richland to Salt Lake City	90	94.4%	-13.5 min	0.0%
PSC–DEN	Pasco/Kennewick/Richland to Denver	62	90.3%	-16.1 min	1.6%
PSC–SFO	Pasco/Kennewick/Richland to San Francisco	62	85.5%	-0.6 min	1.6%
PSC–PHX	Pasco/Kennewick/Richland to Phoenix	61	90.2%	-0.3 min	0.0%
PSC–BUR	Pasco/Kennewick/Richland to Burbank	31	74.2%	-5.2 min	3.2%
PSC–LAX	Pasco/Kennewick/Richland to Los Angeles	31	77.4%	-0.6 min	0.0%
PSC–MSP	Pasco/Kennewick/Richland to Minneapolis	31	93.5%	15.0 min	0.0%
PSC–LAS	Pasco/Kennewick/Richland to Las Vegas	21	85.7%	-0.8 min	0.0%
PSC–AZA	Pasco/Kennewick/Richland to Phoenix	19	73.7%	-0.7 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), December 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2025	Minutes
Air carrier	63.1%	33.3%	3,968
Late-arriving aircraft	11.7%	41.1%	737
National Aviation System	14.1%	19.1%	887
Extreme weather	10.4%	6.4%	652
Security	0.7%	0.2%	45

6,289 delay minutes on 65 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 December 2025?

87.5% of 567 scheduled domestic departures left less than 15 minutes late, and 87.5% reached their destination on time. The national figures that month were 72.0% and 71.9%.

How does that compare with a year earlier?

In December 2024, 84.7% of 567 departures left on time and 0.4% were cancelled, against 87.5% and 0.5% in December 2025.

Provenance

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