Flight number record

OO 4045

SkyWest Airlines · Salt Lake City to Palm Springs

Route: SLC → PSP
Departs: 20:45
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4045, 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 4045 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 40 minutes. That rests on 364 flights, with a median arrival 12 minutes early.

Set against the rest of the country, OO 4045's record is 16 points better than the US average of 77.6%. That gap is worth roughly 155 fewer late arrivals for every thousand flights.

On time

93.1%

Arrivals under 15 minutes late, of 364 completed flights

Avg delay

40 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

0.8%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 2026. The median arrival is 12 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 4045 flies

OO 4045 flies SLC to PSP without a single fixed slot. Its most common scheduled departure was 20:45, used on 74 of 364 flights, with 20:30 (66 flights) and 20:50 (58 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 20:4574 flights20.3%
Departs 20:3066 flights18.1%
Departs 20:5058 flights15.9%

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 20:45 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and OO 4045 runs 23 points better at 93.1%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

OO 4045 next to SLC to PSP

Every carrier on SLC to PSP combined arrived on time 92.0% of the time across 1,078 flights, so OO 4045 is about level with it. SkyWest flew 1,007 flights on the same city pair under all its flight numbers, including this one, and those ran 92.6% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 14 points.

OO 4045 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4045thin sample	364	93.1%	40 min	0.00%	A+
All SkyWest Airlines on SLC–PSP	1,007	92.6%	49 min	0.40%	A+
All carriers on SLC–PSP	1,078	92.0%	50 min	0.37%	A+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4045 quarter by quarter

Quarter by quarter OO 4045 held fairly steady: 89.1% in Jul–Sep 2025, 96.7% in Oct–Dec 2025, 88.9% in Jan–Mar 2026 and 97.8% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights89.1%
Oct–Dec 202591 flights96.7%
Jan–Mar 202690 flights88.9%
Apr–Jun 202691 flights97.8%

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

By weekday, OO 4045 did best on Wednesday at 98.1% on time and worst on Thursday at 82.4%. Each day rests on about 52 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4045 runs late

One category carries most of the weight here. Carrier accounts for 52% of the 1,008 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
52%
Extreme weather
42%
National Airspace System
6%

Extreme weather accounts for 42% 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 6.7 times the usual weather exposure. The split is drawn from 1,008 delay minutes reported on OO 4045.

Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are 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 0.8% 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 541 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.

Every one of the 364 flights under OO 4045 in the data flew SLC to PSP. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 364 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 4045

For a booking, OO 4045 has one of the better records a US domestic flight can show: 93.1% on time and 0.00% 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