Flight number record

OO 3777

SkyWest Airlines · Fresno to Salt Lake City

Route: FAT → SLC
Departs: 17:15
Flights: 341
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 3777, 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 3777 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 77.6%. When something does go wrong the average delay runs about an hour. That rests on 341 flights, with a median arrival 12 minutes early.

Set against the rest of the country, OO 3777's record is 17 points better than the US average of 77.6%. That gap is worth roughly 165 fewer late arrivals for every thousand flights.

On time

94.1%

Arrivals under 15 minutes late, of 340 completed flights

Avg delay

67 min

Across delayed arrivals only, not all flights

Cancelled

0.29%

National rate is 1.81%

1 hour+ late

1.8%

National rate is 8.1%

These figures cover 341 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 3777 flies

OO 3777 flies FAT to SLC without a single fixed slot. Its most common scheduled departure was 17:15, used on 151 of 341 flights, with 17:10 (60 flights) and 17:09 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:15151 flights44.3%
Departs 17:1060 flights17.6%
Departs 17:0938 flights11.1%

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 17:15 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 3777 runs 26 points better at 94.1%. 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 3777 next to FAT to SLC

Every carrier on FAT to SLC combined arrived on time 95.0% of the time across 1,369 flights, so OO 3777 is about level with it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 15 points.

OO 3777 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3777thin sample	341	94.1%	67 min	0.29%	A+
All SkyWest Airlines on FAT–SLC	1,369	95.0%	86 min	0.51%	A+
All carriers on FAT–SLC	1,369	95.0%	86 min	0.51%	A+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 3777 quarter by quarter

Quarter by quarter OO 3777 held fairly steady: 92.9% in Jul–Sep 2025, 95.9% in Oct–Dec 2025, 93.3% in Jan–Mar 2026 and 94.5% in Apr–Jun 2026. A spread of 3 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202585 flights92.9%
Oct–Dec 202575 flights95.9%
Jan–Mar 202690 flights93.3%
Apr–Jun 202691 flights94.5%

Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3777 ranged from 90.0% on Friday to 98.0% on Sunday. With about 49 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 3777 runs late

One category carries most of the weight here. Carrier accounts for 69% of the 1,329 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
69%
Extreme weather
28%
National Airspace System
3%

Extreme weather accounts for 28% 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 4.5 times the usual weather exposure. The split is drawn from 1,329 delay minutes reported on OO 3777.

Cancellations are rare at 0.29%, below the national 1.81% 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 1.8% 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 501 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.

OO 3777 is not only a FAT to SLC flight. It also flew SLC to FAT (341 flights, 95.0% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 341 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.

Other routes flown as OO 3777
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SLC to FATthin sample	341	95.0%	65 min	0.29%	A+

What to do with this

Booking OO 3777

For a booking, OO 3777 has one of the better records a US domestic flight can show: 94.1% on time and 0.29% 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