Flight number record
OO 4764
SkyWest Airlines · Fresno to Denver
- Route
- FAT → DEN
- Departs
- 12:50
- Flights
- 357
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4764, 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 4764 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 11 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 55 minutes. That rests on 357 flights, with a median arrival 10 minutes early.
Set against the rest of the country, OO 4764's record is 11 points better than the US average of 77.6%. That gap is worth roughly 106 fewer late arrivals for every thousand flights.
Key figures
On time
88.2%
Arrivals under 15 minutes late, of 357 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.81%
1 hour+ late
3.9%
National rate is 8.1%
These figures cover 357 flights between July 2025 and June 2026. The median arrival is 10 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 4764 flies
OO 4764 flies FAT to DEN without a single fixed slot. Its most common scheduled departure was 12:50, used on 56 of 357 flights, with 12:55 (51 flights) and 12:49 (49 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 12:5056 flights15.7%
- Departs 12:5551 flights14.3%
- Departs 12:4949 flights13.7%
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 12:50 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 4764 runs 9 points better at 88.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
OO 4764 next to FAT to DEN
Every carrier on FAT to DEN combined arrived on time 87.8% of the time across 1,450 flights, so OO 4764 is about level with it. SkyWest flew 747 flights on the same city pair under all its flight numbers, including this one, and those ran 90.2% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4764thin sample | 357 | 88.2% | 55 min | 0.00% | A+ |
| All SkyWest Airlines on FAT–DEN | 747 | 90.2% | 72 min | 0.00% | A+ |
| All carriers on FAT–DEN | 1,450 | 87.8% | 70 min | 0.07% | A+ |
| SkyWest Airlines, whole network | 852,935 | 79.0% | 88 min | 1.77% | B |
Across the year
OO 4764 quarter by quarter
OO 4764 did not run the same all year. Its best quarter was Oct–Dec 2025 at 95.6% on time and its weakest Jul–Sep 2025 at 78.3%, a swing of 17 points on roughly 89 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 202592 flights78.3%
- Oct–Dec 202590 flights95.6%
- Jan–Mar 202690 flights84.4%
- Apr–Jun 202685 flights95.3%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, OO 4764 ranged from 86.3% on Sunday to 94.2% on Wednesday. With about 51 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.
Delay causes
Why OO 4764 runs late
One category carries most of the weight here. Carrier accounts for 45% of the 2,300 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.
- 45%Carrier
- 31%National Airspace System
- 16%Late-arriving aircraft
- 8%Extreme weather
The largest share of delay minutes, 45%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,037 of the 2,300 delay minutes reported here. The split is drawn from 2,300 delay minutes reported on OO 4764.
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 3.9% 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 844 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 one other city pair in the data, including DRO to DEN (6), but none flew often enough under OO 4764 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to FAT to DEN only.
One caution: this is a thin sample. 357 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 4764
For a booking, OO 4764 has one of the better records a US domestic flight can show: 88.2% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- FAT to DEN, every carrier and departure
- DEN to FAT, the return direction
- SkyWest Airlines 5787 on the same route92.0%
- United Airlines 1774 on the same route94.4%
- Denver International (DEN) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.