Flight number record

OO 4050

SkyWest Airlines · Tucson to Salt Lake City

Route: TUS → SLC
Departs: 11:15
Flights: 274
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4050, 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 4050 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 18 points better than the national rate of 77.6%. When something does go wrong the average delay runs close to two hours. That rests on 274 flights, with a median arrival 16 minutes early.

Set against the rest of the country, OO 4050's record is 18 points better than the US average of 77.6%. That gap is worth roughly 176 fewer late arrivals for every thousand flights.

On time

95.2%

Arrivals under 15 minutes late, of 273 completed flights

Avg delay

119 min

Across delayed arrivals only, not all flights

Cancelled

0.36%

National rate is 1.81%

1 hour+ late

3.3%

National rate is 8.1%

These figures cover 274 flights between July 2025 and June 2026. The median arrival is 16 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 4050 flies

OO 4050 flies TUS to SLC without a single fixed slot. Its most common scheduled departure was 11:15, used on 90 of 274 flights, with 10:59 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 11:1590 flights32.8%
Departs 10:5935 flights12.8%

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 11:15 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 4050 runs 16 points better at 95.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 4050 next to TUS to SLC

Every carrier on TUS to SLC combined arrived on time 93.7% of the time across 1,112 flights, so OO 4050 is 2 points ahead of it. SkyWest flew 1,087 flights on the same city pair under all its flight numbers, including this one, and those ran 93.8% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 16 points.

OO 4050 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4050thin sample	274	95.2%	119 min	0.36%	A+
All SkyWest Airlines on TUS–SLC	1,087	93.8%	81 min	0.18%	A+
All carriers on TUS–SLC	1,112	93.7%	79 min	0.27%	A+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4050 quarter by quarter

Quarter by quarter OO 4050 held fairly steady: 96.7% in Jul–Sep 2025, 96.7% in Oct–Dec 2025 and 90.9% in Jan–Mar 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights96.7%
Oct–Dec 202592 flights96.7%
Jan–Mar 202666 flights90.9%
Apr–Jun 202624 flights—

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

By weekday, OO 4050 ranged from 89.7% on Monday to 100.0% on Tuesday. With about 39 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why OO 4050 runs late

One category carries most of the weight here. Carrier accounts for 92% of the 1,547 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
92%
Extreme weather
7%
National Airspace System
1%

The largest share of delay minutes, 92%, 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 1,422 of the 1,547 delay minutes reported here. The split is drawn from 1,547 delay minutes reported on OO 4050.

Cancellations are rare at 0.36%, 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 3.3% 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 600 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 three other city pairs in the data, including SLC to TUS (172), BOI to SLC (6) and SLC to BOI (6), but none flew often enough under OO 4050 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to TUS to SLC only.

One caution: this is a thin sample. 274 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 4050

For a booking, OO 4050 has one of the better records a US domestic flight can show: 95.2% on time and 0.36% 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