Flight number record

OO 3903

SkyWest Airlines · Salt Lake City to Oakland

Route: SLC → OAK
Departs: 15:10
Flights: 344
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 3903, 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 3903 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 77.6%. When something does go wrong the average delay runs about 50 minutes. That rests on 344 flights, with a median arrival 9 minutes early.

Set against the rest of the country, OO 3903's record is 14 points better than the US average of 77.6%. That gap is worth roughly 140 fewer late arrivals for every thousand flights.

On time

91.6%

Arrivals under 15 minutes late, of 344 completed flights

Avg delay

49 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

2.3%

National rate is 8.1%

These figures cover 344 flights between July 2025 and June 2026. The median arrival is 9 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 3903 flies

OO 3903 flies SLC to OAK without a single fixed slot. Its most common scheduled departure was 15:10, used on 71 of 344 flights, with 15:00 (62 flights) and 15:24 (56 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:1071 flights20.6%
Departs 15:0062 flights18.0%
Departs 15:2456 flights16.3%

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 15:10 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and OO 3903 runs 19 points better at 91.6%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 3903 next to SLC to OAK

Every carrier on SLC to OAK combined arrived on time 90.2% of the time across 1,670 flights, so OO 3903 is about level with it. SkyWest flew 1,074 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 79.0%, which this flight beats by 13 points.

OO 3903 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3903thin sample	344	91.6%	49 min	0.00%	A+
All SkyWest Airlines on SLC–OAK	1,074	92.4%	53 min	0.19%	A+
All carriers on SLC–OAK	1,670	90.2%	53 min	0.18%	A+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 3903 quarter by quarter

Quarter by quarter OO 3903 held fairly steady: 92.3% in Jul–Sep 2025, 93.2% in Oct–Dec 2025, 86.5% in Jan–Mar 2026 and 93.4% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202591 flights92.3%
Oct–Dec 202588 flights93.2%
Jan–Mar 202674 flights86.5%
Apr–Jun 202691 flights93.4%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3903 ranged from 84.3% on Monday to 95.2% on Saturday. With about 49 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.

Delay causes

Why OO 3903 runs late

One category carries most of the weight here. Carrier accounts for 68% of the 1,429 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
68%
Extreme weather
25%
National Airspace System
6%

Extreme weather accounts for 25% 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 4.1 times the usual weather exposure. The split is drawn from 1,429 delay minutes reported on OO 3903.

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 2.3% 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 588 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 3903 is not only a SLC to OAK flight. It also flew OAK to SLC (344 flights, 93.0% 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. 344 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 3903
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
OAK to SLCthin sample	344	93.0%	53 min	0.00%	A+

What to do with this

Booking OO 3903

For a booking, OO 3903 has one of the better records a US domestic flight can show: 91.6% 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures