Flight number record

OO 3717

SkyWest Airlines · Salt Lake City to Tucson

Route: SLC → TUS
Departs: 15:00
Flights: 357
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3717, 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 3717 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 77.3%. When something does go wrong the average delay runs about an hour. That rests on 357 flights, with a median arrival 9 minutes early.

Set against the rest of the country, OO 3717's record is 17 points better than the US average of 77.3%. That gap is worth roughly 165 fewer late arrivals for every thousand flights.

On time

93.8%

Arrivals under 15 minutes late, of 356 completed flights

Avg delay

56 min

Across delayed arrivals only, not all flights

Cancelled

0.28%

National rate is 1.89%

1 hour+ late

2.5%

National rate is 8.3%

These figures cover 357 flights between September 2025 and August 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.

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Schedule

When OO 3717 flies

OO 3717 flies SLC to TUS without a single fixed slot. Its most common scheduled departure was 15:00, used on 172 of 357 flights, with 15:10 (49 flights) and 15:15 (44 flights) next.

Departs 15:00172 flights48.2%
Departs 15:1049 flights13.7%
Departs 15:1544 flights12.3%

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 15:00 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and OO 3717 runs 22 points better at 93.8%. 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 3717 next to SLC to TUS

Every carrier on SLC to TUS combined arrived on time 91.4% of the time across 1,112 flights, so OO 3717 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 91.4% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 15 points.

OO 3717 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3717thin sample	357	93.8%	56 min	0.28%	A+
All SkyWest Airlines on SLC–TUS	1,087	91.4%	50 min	0.18%	A+
All carriers on SLC–TUS	1,112	91.4%	52 min	0.18%	A+
SkyWest Airlines, whole network	855,406	78.7%	88 min	1.79%	B

Across the year

OO 3717 quarter by quarter

Quarter by quarter OO 3717 held fairly steady: 93.3% in Jul–Sep 2025, 94.1% in Oct–Dec 2025, 91.0% in Jan–Mar 2026, 95.6% in Apr–Jun 2026 and 95.1% in Jul–Sep 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202530 flights93.3%
Oct–Dec 202586 flights94.1%
Jan–Mar 202689 flights91.0%
Apr–Jun 202691 flights95.6%
Jul–Sep 202661 flights95.1%

Scale runs 85% to 100%.

By weekday, OO 3717 ranged from 86.5% on Sunday to 96.2% on Monday. With about 51 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.

Arrival by arrival

How late OO 3717 runs when it is late

OO 3717 often beats the schedule: 108 of 356 completed flights, 30%, arrived 15 minutes or more early. The 22 late arrivals split 8 under half an hour, 5 between 30 and 60 minutes, and 9 an hour or more.

15+ min early108 flights30.3%
Within 15 min226 flights63.5%
15–29 min late8 flights2.2%
30–59 min late5 flights1.4%
1–2 hours late7 flights2.0%
2+ hours late2 flights0.6%

Scale runs 0% to 100%.

Share of 356 completed flights by arrival against schedule.

4 of 21 late departures made up the time and arrived on time, 19% of them. Only 5 left on time and still arrived late.

The worst days

Worst days for OO 3717

The latest arrival of the period was on 13 June 2026, 2 hours 51 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.

The latest arrivals of OO 3717 in the period
Date	Arrived late by	Largest filed cause
13 June 2026	2 hours 51 minutes	Carrier
12 July 2026	2 hours 35 minutes	Extreme weather
7 December 2025	1 hour 39 minutes	Carrier
18 February 2026	1 hour 32 minutes	Extreme weather
30 November 2025	1 hour 25 minutes	Carrier

Delay causes

Why OO 3717 runs late

Carrier accounts for 62% of the 1,236 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
62%
Extreme weather
35%
National Airspace System
3%

Extreme weather accounts for 35% 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 5.7 times the usual weather exposure. The split is drawn from 1,236 delay minutes reported on OO 3717.

Cancellations are rare at 0.28%, below the national 1.89% 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 2.5% 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 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.

The same number turns up on one other city pair in the data, including TUS to SLC (95), but none flew often enough under OO 3717 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SLC to TUS 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 3717

For a booking, OO 3717 has one of the better records a US domestic flight can show: 93.8% on time and 0.28% 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