Tri Cities in May 2025

92.7%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 May 2025, reporting carriers scheduled 617 domestic departures from Tri Cities (PSC). 92.7% left less than 15 minutes late and 88.3% reached their destination on time; 0.3% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so PSC departures were 16.0 points above the national departure figure.

A year earlier, in May 2024, the airport had 425 departures with 89.4% leaving on time: a change of +3.3 points, with flights up 45%.

Flights arriving at PSC that month were on time 82.5% of the time (617 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 44%, late-arriving aircraft 37% and national aviation system 19%.

On time 88.3%
Arrived 15+ minutes late 10.9%
Cancelled 0.3%
Diverted 0.5%

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

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

Measure	May 2025	May 2024	PSC, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	92.7%	89.4%	88.0%	76.7%
Arrived on time	88.3%	89.6%	86.7%	75.4%
Cancelled	0.3%	0.0%	0.5%	1.0%
Average departure delay (late minutes only)	4.8 min	6.7 min	12.2 min	17.5 min
Scheduled departures a day	21	14	17	20,188
Scheduled departures	617	425	6,190	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	476	77%	88.0%	-4.4 min	0.0%
DL Delta Air Lines	56	9%	96.4%	-12.5 min	0.0%
AS Alaska Airlines	31	5%	83.9%	5.7 min	6.5%
UA United Airlines	31	5%	90.3%	5.0 min	0.0%
G4 Allegiant Air	23	4%	78.3%	3.8 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
PSC–SEA	Pasco/Kennewick/Richland to Seattle	235	86.0%	-1.4 min	0.9%
PSC–SLC	Pasco/Kennewick/Richland to Salt Lake City	113	98.2%	-11.9 min	0.0%
PSC–DEN	Pasco/Kennewick/Richland to Denver	62	82.3%	3.0 min	0.0%
PSC–PHX	Pasco/Kennewick/Richland to Phoenix	62	95.2%	-12.2 min	0.0%
PSC–SFO	Pasco/Kennewick/Richland to San Francisco	60	81.7%	0.4 min	0.0%
PSC–LAX	Pasco/Kennewick/Richland to Los Angeles	31	87.1%	-3.7 min	0.0%
PSC–MSP	Pasco/Kennewick/Richland to Minneapolis	31	90.3%	-3.5 min	0.0%
PSC–AZA	Pasco/Kennewick/Richland to Phoenix	12	66.7%	9.8 min	0.0%
PSC–LAS	Pasco/Kennewick/Richland to Las Vegas	11	90.9%	-2.7 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), May 2025.

Delay causes

BTS cause category	Share of delay minutes	National, May 2025	Minutes
Air carrier	44.0%	29.3%	1,520
Late-arriving aircraft	37.2%	37.8%	1,285
National Aviation System	18.7%	25.9%	647
Extreme weather	0.0%	6.9%	0
Security	0.0%	0.1%	0

3,452 delay minutes on 67 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 May 2025?

92.7% of 617 scheduled domestic departures left less than 15 minutes late, and 88.3% reached their destination on time. The national figures that month were 76.7% and 75.4%.

How does that compare with a year earlier?

In May 2024, 89.4% of 425 departures left on time and 0.0% were cancelled, against 92.7% and 0.3% in May 2025.

Provenance

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