Flight number record

OO 3958

SkyWest Airlines · Salt Lake City to Pasco

Route: SLC → PSC
Departs: 11:15
Flights: 305
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 3958, 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 3958 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 15 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 305 flights, with a median arrival 11 minutes early.

Set against the rest of the country, OO 3958's record is 15 points better than the US average of 77.6%. That gap is worth roughly 145 fewer late arrivals for every thousand flights.

On time

92.1%

Arrivals under 15 minutes late, of 304 completed flights

Avg delay

68 min

Across delayed arrivals only, not all flights

Cancelled

0.33%

National rate is 1.81%

1 hour+ late

3.3%

National rate is 8.1%

These figures cover 305 flights between July 2025 and June 2026. The median arrival is 11 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.

Schedule

When OO 3958 flies

OO 3958 flies SLC to PSC without a single fixed slot. Its most common scheduled departure was 11:15, used on 73 of 305 flights, with 11:05 (62 flights) and 11:35 (53 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 11:1573 flights23.9%
Departs 11:0562 flights20.3%
Departs 11:3553 flights17.4%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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

A 11:15 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 3958 runs 13 points better at 92.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 3958 next to SLC to PSC

Every carrier on SLC to PSC combined arrived on time 89.0% of the time across 1,180 flights, so OO 3958 is 3 points ahead of it. SkyWest flew 832 flights on the same city pair under all its flight numbers, including this one, and those ran 90.9% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 13 points.

OO 3958 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3958thin sample	305	92.1%	68 min	0.33%	A+
All SkyWest Airlines on SLC–PSC	832	90.9%	61 min	0.12%	A+
All carriers on SLC–PSC	1,180	89.0%	70 min	0.17%	A+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 3958 quarter by quarter

Quarter by quarter OO 3958 held fairly steady: 92.4% in Jul–Sep 2025, 94.5% in Oct–Dec 2025, 86.4% in Jan–Mar 2026 and 94.5% in Apr–Jun 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights92.4%
Oct–Dec 202592 flights94.5%
Jan–Mar 202666 flights86.4%
Apr–Jun 202655 flights94.5%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3958 did best on Tuesday at 100.0% on time and worst on Friday at 83.7%. Each day rests on about 44 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 3958 runs late

One category carries most of the weight here. Carrier accounts for 57% of the 1,621 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
57%
Extreme weather
37%
National Airspace System
6%

Extreme weather accounts for 37% 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 6.0 times the usual weather exposure. The split is drawn from 1,621 delay minutes reported on OO 3958.

Cancellations are rare at 0.33%, below the national 1.81% 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

Badly late arrivals are rare here: only 3.3% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

The 521 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The same number turns up on three other city pairs in the data, including PSC to SLC (47), SMF to LAX (31) and BOI to SEA (23), but none flew often enough under OO 3958 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SLC to PSC only.

One caution: this is a thin sample. 305 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 3958

For a booking, OO 3958 has one of the better records a US domestic flight can show: 92.1% on time and 0.33% 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures