Tri Cities in May 2026

84.5%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 May 2026, reporting carriers scheduled 497 domestic departures from Tri Cities (PSC). 84.5% left less than 15 minutes late and 85.3% reached their destination on time; 0.0% were cancelled.

Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so PSC departures were 7.4 points above the national departure figure.

A year earlier, in May 2025, the airport had 617 departures with 92.7% leaving on time: a change of −8.2 points, with flights down 19%.

Flights arriving at PSC that month were on time 79.1% of the time (498 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 60%, national aviation system 17% and late-arriving aircraft 14%.

On time 85.3%
Arrived 15+ minutes late 14.7%
Cancelled 0.0%
Diverted 0.0%

Every scheduled departure from PSC in May 2026, judged by arrival at the destination.

May 2026 against a year earlier, the airport's year and the nation

Measure	May 2026	May 2025	PSC, 12 months to Jul 2026	All reported flights, May 2026
Departed on time	84.5%	92.7%	88.0%	77.1%
Arrived on time	85.3%	88.3%	86.7%	77.6%
Cancelled	0.0%	0.3%	0.5%	0.9%
Average departure delay (late minutes only)	16.7 min	4.8 min	12.2 min	16.0 min
Scheduled departures a day	17	21	17	20,391
Scheduled departures	497	617	6,190	611,735

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	382	77%	84.6%	4.1 min	0.0%
DL Delta Air Lines	56	11%	92.9%	-4.7 min	0.0%
UA United Airlines	31	6%	90.3%	-7.5 min	0.0%
G4 Allegiant Air	28	6%	75.0%	42.1 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
PSC–SEA	Pasco/Kennewick/Richland to Seattle	130	87.7%	-1.2 min	0.0%
PSC–SLC	Pasco/Kennewick/Richland to Salt Lake City	113	94.7%	-12.1 min	0.0%
PSC–DEN	Pasco/Kennewick/Richland to Denver	62	90.3%	0.8 min	0.0%
PSC–PHX	Pasco/Kennewick/Richland to Phoenix	61	86.9%	11.1 min	0.0%
PSC–SFO	Pasco/Kennewick/Richland to San Francisco	41	43.9%	45.9 min	0.0%
PSC–LAX	Pasco/Kennewick/Richland to Los Angeles	31	93.5%	-2.2 min	0.0%
PSC–MSP	Pasco/Kennewick/Richland to Minneapolis	31	83.9%	1.5 min	0.0%
PSC–AZA	Pasco/Kennewick/Richland to Phoenix	10	80.0%	8.9 min	0.0%
PSC–LAS	Pasco/Kennewick/Richland to Las Vegas	9	66.7%	112.1 min	0.0%
PSC–SNA	Pasco/Kennewick/Richland to Santa Ana	9	77.8%	9.0 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), May 2026.

Delay causes

BTS cause category	Share of delay minutes	National, May 2026	Minutes
Air carrier	60.4%	33.0%	4,634
Late-arriving aircraft	14.4%	40.4%	1,102
National Aviation System	17.2%	20.5%	1,319
Extreme weather	8.1%	6.0%	620
Security	0.0%	0.1%	0

7,675 delay minutes on 73 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 2026?

84.5% of 497 scheduled domestic departures left less than 15 minutes late, and 85.3% reached their destination on time. The national figures that month were 77.1% and 77.6%.

How does that compare with a year earlier?

In May 2025, 92.7% of 617 departures left on time and 0.3% were cancelled, against 84.5% and 0.0% in May 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2026; 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.