Flight number record

OO 4764

SkyWest Airlines · Fresno to Denver

Route: FAT → DEN
Departs: 12:55
Flights: 316
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 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 14 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 316 flights, with a median arrival 13 minutes early.

Set against the rest of the country, OO 4764's record is 14 points better than the US average of 77.3%. That gap is worth roughly 138 fewer late arrivals for every thousand flights.

On time

91.1%

Arrivals under 15 minutes late, of 316 completed flights

Avg delay

52 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.89%

1 hour+ late

2.8%

National rate is 8.3%

These figures cover 316 flights between September 2025 and August 2026. The median arrival is 13 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 4764 flies

OO 4764 flies FAT to DEN without a single fixed slot. Its most common scheduled departure was 12:55, used on 51 of 316 flights, with 12:50 (43 flights) and 12:45 (37 flights) next.

Departs 12:5551 flights16.1%
Departs 12:5043 flights13.6%
Departs 12:4537 flights11.7%

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 12:55 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and OO 4764 runs 13 points better at 91.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

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Against the route

OO 4764 next to FAT to DEN

Every carrier on FAT to DEN combined arrived on time 88.7% of the time across 1,449 flights, so OO 4764 is 2 points ahead of it. SkyWest flew 746 flights on the same city pair under all its flight numbers, including this one, and those ran 91.1% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 12 points.

OO 4764 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4764thin sample	316	91.1%	52 min	0.00%	A+
All SkyWest Airlines on FAT–DEN	746	91.1%	87 min	0.00%	A+
All carriers on FAT–DEN	1,449	88.7%	74 min	0.07%	A+
SkyWest Airlines, whole network	855,406	78.7%	88 min	1.79%	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 83.3%, a swing of 12 points on roughly 79 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 flights83.3%
Oct–Dec 202590 flights95.6%
Jan–Mar 202690 flights84.4%
Apr–Jun 202685 flights95.3%
Jul–Sep 202621 flights—

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4764 ranged from 86.7% on Friday to 97.8% on Wednesday. With about 45 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Arrival by arrival

How late OO 4764 runs when it is late

OO 4764 often beats the schedule: 143 of 316 completed flights, 45%, arrived 15 minutes or more early. The 28 late arrivals split 10 under half an hour, 9 between 30 and 60 minutes, and 9 an hour or more.

15+ min early143 flights45.3%
Within 15 min145 flights45.9%
15–29 min late10 flights3.2%
30–59 min late9 flights2.8%
1–2 hours late7 flights2.2%
2+ hours late2 flights0.6%

Scale runs 0% to 100%.

Share of 316 completed flights by arrival against schedule.

5 of 24 late departures made up the time and arrived on time, 21% of them. 9 flights left on time and still arrived late.

The worst days

Worst days for OO 4764

The latest arrival of the period was on 17 February 2026, 2 hours 17 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The same cause led on three of the five worst days.

The latest arrivals of OO 4764 in the period
Date	Arrived late by	Largest filed cause
17 February 2026	2 hours 17 minutes	National Airspace System
26 December 2025	2 hours 6 minutes	Late-arriving aircraft
9 February 2026	1 hour 58 minutes	Carrier
12 March 2026	1 hour 45 minutes	National Airspace System
6 March 2026	1 hour 38 minutes	National Airspace System

Delay causes

Why OO 4764 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 1,443 reported delay minutes.

Carrier
34%
National Airspace System
34%
Late-arriving aircraft
19%
Extreme weather
12%

Extreme weather accounts for 12% 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 2.0 times the usual weather exposure. The split is drawn from 1,443 delay minutes reported on OO 4764.

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 2.8% 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 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.

The same number turns up on one other city pair in the data, including DRO to DEN (47), 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. 316 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: 91.1% 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures