Flight number record
OO 4045
SkyWest Airlines · Salt Lake City to Palm Springs
- Route
- SLC → PSP
- Departs
- 20:45
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 17 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 40 minutes. That rests on 364 flights, with a median arrival 14 minutes early.
Set against the rest of the country, OO 4045's record is 17 points better than the US average of 77.3%. That gap is worth roughly 167 fewer late arrivals for every thousand flights.
Key figures
On time
94.0%
Arrivals under 15 minutes late, of 364 completed flights
Avg delay
41 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
0.5%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 14 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 4045 flies
OO 4045 flies SLC to PSP without a single fixed slot. Its most common scheduled departure was 20:45, used on 101 of 364 flights, with 20:40 (59 flights) and 20:50 (58 flights) next.
- Departs 20:45101 flights27.7%
- Departs 20:4059 flights16.2%
- Departs 20:5058 flights15.9%
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 20:45 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and OO 4045 runs 24 points better at 94.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
OO 4045 next to SLC to PSP
Every carrier on SLC to PSP combined arrived on time 91.8% of the time across 1,080 flights, so OO 4045 is 2 points ahead of it. SkyWest flew 1,009 flights on the same city pair under all its flight numbers, including this one, and those ran 92.4% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 15 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4045thin sample | 364 | 94.0% | 41 min | 0.00% | A+ |
| All SkyWest Airlines on SLC–PSP | 1,009 | 92.4% | 54 min | 0.40% | A+ |
| All carriers on SLC–PSP | 1,080 | 91.8% | 55 min | 0.37% | A+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4045 quarter by quarter
Quarter by quarter OO 4045 held fairly steady: 93.3% in Jul–Sep 2025, 96.7% in Oct–Dec 2025, 88.9% in Jan–Mar 2026, 97.8% in Apr–Jun 2026 and 91.9% in Jul–Sep 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 202530 flights93.3%
- Oct–Dec 202591 flights96.7%
- Jan–Mar 202690 flights88.9%
- Apr–Jun 202691 flights97.8%
- Jul–Sep 202662 flights91.9%
Scale runs 80% to 100%.
By weekday, OO 4045 did best on Friday at 98.1% on time and worst on Thursday at 84.3%. Each day rests on about 52 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4045 runs when it is late
OO 4045 often beats the schedule: 171 of 364 completed flights, 47%, arrived 15 minutes or more early. Most of the lateness is short. 11 of the 22 late arrivals were under half an hour behind, and 2 reached an hour or more.
- 15+ min early171 flights47.0%
- Within 15 min171 flights47.0%
- 15–29 min late11 flights3.0%
- 30–59 min late9 flights2.5%
- 1–2 hours late1 flights0.3%
- 2+ hours late1 flights0.3%
Scale runs 0% to 100%.
Share of 364 completed flights by arrival against schedule.
A late pushback is often recovered here: of 32 departures that left 15 minutes late or more, 11 still arrived on time. Only 1 left on time and still arrived late.
The worst days
Worst days for OO 4045
The latest arrival of the period was on 18 February 2026, 3 hours 43 minutes behind schedule; most of its delay minutes were filed as extreme weather. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 February 2026 | 3 hours 43 minutes | Extreme weather |
| 16 April 2026 | 1 hour 4 minutes | Carrier |
| 11 October 2025 | 53 minutes | Extreme weather |
| 13 August 2026 | 49 minutes | Carrier |
| 29 July 2026 | 48 minutes | Extreme weather |
Delay causes
Why OO 4045 runs late
Extreme weather accounts for 52% of the 901 delay minutes carriers reported here, and the remaining four split what is left.
- 52%Extreme weather
- 44%Carrier
- 4%National Airspace System
Extreme weather accounts for 52% 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 8.6 times the usual weather exposure. The split is drawn from 901 delay minutes reported on OO 4045.
Cancellations are rare at 0.00%, below the national 1.89% 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 0.5% land an hour or more behind schedule, against 8.3% 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.
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: 94.0% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SLC to PSP, every carrier and departure
- PSP to SLC, the return direction
- Salt Lake City International (SLC) delay statistics
- SkyWest Airlines on-time record
- Every SkyWest Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
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 ; recomputed monthly. How this data is collected.