Flight number record
OO 6327
SkyWest Airlines · Salt Lake City to Phoenix
- Route
- SLC → PHX
- Departs
- 08:17
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 6327, 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 6327 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 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 2.4 hours. That rests on 365 flights, with a median arrival 8 minutes early.
Set against the rest of the country, OO 6327's record is 12 points better than the US average of 77.3%. That gap is worth roughly 120 fewer late arrivals for every thousand flights.
Key figures
On time
89.3%
Arrivals under 15 minutes late, of 364 completed flights
Avg delay
142 min
Across delayed arrivals only, not all flights
Cancelled
0.27%
National rate is 1.89%
1 hour+ late
3.3%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 8 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 6327 flies
OO 6327 flies SLC to PHX without a single fixed slot. Its most common scheduled departure was 08:17, used on 78 of 365 flights, with 07:13 (74 flights) and 08:23 (44 flights) next.
- Departs 08:1778 flights21.4%
- Departs 07:1374 flights20.3%
- Departs 08:2344 flights12.1%
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 08:17 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 6327 runs 5 points better at 89.3%. 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 6327 next to SLC to PHX
Every carrier on SLC to PHX combined arrived on time 83.5% of the time across 5,778 flights, so OO 6327 is 6 points ahead of it. SkyWest flew 1,222 flights on the same city pair under all its flight numbers, including this one, and those ran 85.3% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 6327 | 365 | 89.3% | 142 min | 0.27% | A+ |
| All SkyWest Airlines on SLC–PHX | 1,222 | 85.3% | 119 min | 0.25% | A+ |
| All carriers on SLC–PHX | 5,778 | 83.5% | 70 min | 0.54% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 6327 quarter by quarter
OO 6327 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jul–Sep 2026 at 85.5%, a swing of 11 points on roughly 73 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights96.7%
- Oct–Dec 202592 flights91.2%
- Jan–Mar 202690 flights88.9%
- Apr–Jun 202691 flights87.9%
- Jul–Sep 202662 flights85.5%
Scale runs 75% to 100%.
By weekday, OO 6327 did best on Wednesday at 98.1% on time and worst on Thursday at 82.7%. Each day rests on about 52 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 6327 runs when it is late
OO 6327 often beats the schedule: 104 of 364 completed flights, 29%, arrived 15 minutes or more early. The 39 late arrivals split 13 under half an hour, 14 between 30 and 60 minutes, and 12 an hour or more.
- 15+ min early104 flights28.6%
- Within 15 min221 flights60.7%
- 15–29 min late13 flights3.6%
- 30–59 min late14 flights3.8%
- 1–2 hours late2 flights0.5%
- 2+ hours late10 flights2.7%
Scale runs 0% to 100%.
Share of 364 completed flights by arrival against schedule.
5 of 27 late departures made up the time and arrived on time, 19% of them. 17 flights left on time and still arrived late.
The worst days
Worst days for OO 6327
The latest arrival of the period was on 1 December 2025, 13 hours 14 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 1 December 2025 | 13 hours 14 minutes | Carrier |
| 11 July 2026 | 12 hours 23 minutes | Carrier |
| 2 August 2026 | 11 hours 29 minutes | Carrier |
| 16 July 2026 | 10 hours 31 minutes | Carrier |
| 12 August 2026 | 6 hours 8 minutes | Carrier |
Delay causes
Why OO 6327 runs late
Carrier accounts for 86% of the 5,545 delay minutes carriers reported here, and the remaining four split what is left.
- 86%Carrier
- 10%Late-arriving aircraft
- 4%National Airspace System
- 1%Extreme weather
The largest share of delay minutes, 86%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 4,773 of the 5,545 delay minutes reported here. The split is drawn from 5,545 delay minutes reported on OO 6327.
Cancellations are rare at 0.27%, 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
Badly late arrivals are rare here: only 3.3% 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 507 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 365 flights under OO 6327 in the data flew SLC to PHX. 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. 365 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 6327
For a booking, OO 6327 has one of the better records a US domestic flight can show: 89.3% on time and 0.27% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SLC to PHX, every carrier and departure
- PHX to SLC, the return direction
- Delta Air Lines 1431 on the same route84.6%
- Delta Air Lines 1447 on the same route94.7%
- Delta Air Lines 1496 on the same route87.1%
- Delta Air Lines 1738 on the same route84.6%
- Salt Lake City International (SLC) delay statistics
- Phoenix Sky Harbor International (PHX) 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.