Flight number record

OO 3992

SkyWest Airlines · Seattle to Pasco

Route: SEA → PSC
Departs: 10:35
Flights: 255
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3992, check with SkyWest Airlines. SkyWest Airlines flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.

OO 3992 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 255 flights, with a median arrival 7 minutes early.

Set against the rest of the country, OO 3992's record is 8 points better than the US average of 77.3%. That gap is worth roughly 77 fewer late arrivals for every thousand flights.

On time

85.0%

Arrivals under 15 minutes late, of 253 completed flights

Avg delay

61 min

Across delayed arrivals only, not all flights

Cancelled

0.39%

National rate is 1.89%

1 hour+ late

6.3%

National rate is 8.3%

These figures cover 255 flights between September 2025 and August 2026. The median arrival is 7 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

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Schedule

When OO 3992 flies

OO 3992 flies SEA to PSC without a single fixed slot. Its most common scheduled departure was 10:35, used on 143 of 255 flights, with 09:40 (38 flights) next.

Departs 10:35143 flights56.1%
Departs 09:4038 flights14.9%

Scale runs 0% to 100%.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 10:35 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 3992 runs level with that at 85.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

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Against the route

OO 3992 next to SEA to PSC

Every carrier on SEA to PSC combined arrived on time 83.3% of the time across 1,678 flights, so OO 3992 is 2 points ahead of it. SkyWest flew 1,465 flights on the same city pair under all its flight numbers, including this one, and those ran 83.8% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 6 points.

OO 3992 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3992thin sample	255	85.0%	61 min	0.39%	A+
All SkyWest Airlines on SEA–PSC	1,465	83.8%	65 min	0.75%	B+
All carriers on SEA–PSC	1,678	83.3%	61 min	0.95%	B+
SkyWest Airlines, whole network	855,406	78.7%	88 min	1.79%	B

Across the year

OO 3992 quarter by quarter

Quarter by quarter OO 3992 held fairly steady: 82.0% in Jan–Mar 2026, 87.9% in Apr–Jun 2026 and 83.9% in Jul–Sep 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Oct–Dec 202512 flights—
Jan–Mar 202690 flights82.0%
Apr–Jun 202691 flights87.9%
Jul–Sep 202662 flights83.9%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3992 ranged from 80.6% on Thursday to 91.4% on Wednesday. With about 36 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Arrival by arrival

How late OO 3992 runs when it is late

The 38 late arrivals split 12 under half an hour, 10 between 30 and 60 minutes, and 16 an hour or more.

15+ min early56 flights22.1%
Within 15 min159 flights62.8%
15–29 min late12 flights4.7%
30–59 min late10 flights4.0%
1–2 hours late12 flights4.7%
2+ hours late4 flights1.6%

Scale runs 0% to 100%.

Share of 253 completed flights by arrival against schedule.

6 of 34 late departures made up the time and arrived on time, 18% of them. 10 flights left on time and still arrived late.

The worst days

Worst days for OO 3992

The latest arrival of the period was on 10 April 2026, 2 hours 55 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).

The latest arrivals of OO 3992 in the period
Date	Arrived late by	Largest filed cause
10 April 2026	2 hours 55 minutes	Extreme weather
17 May 2026	2 hours 54 minutes	Carrier
27 July 2026	2 hours 5 minutes	Carrier
16 August 2026	2 hours 2 minutes	Carrier
12 February 2026	1 hour 59 minutes	Extreme weather

Delay causes

Why OO 3992 runs late

Carrier accounts for 50% of the 2,302 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
50%
Extreme weather
45%
National Airspace System
6%

Extreme weather accounts for 45% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 7.4 times the usual weather exposure. The split is drawn from 2,302 delay minutes reported on OO 3992.

Cancellations are rare at 0.39%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

6.3% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

The same number turns up on seven other city pairs in the data, including PSC to SEA (193), BIS to MSP (10) and MSP to RST (2), but none flew often enough under OO 3992 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SEA to PSC only.

One caution: this is a thin sample. 255 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking OO 3992

For a booking, OO 3992 has one of the better records a US domestic flight can show: 85.0% on time and 0.39% cancelled. That is a base rate, not a promise about any single day.

Where to go next

A flight number here means SkyWest Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures