Flight number record

OO 3788

SkyWest Airlines · Salt Lake City to Colorado Springs

Route: SLC → COS
Departs: 20:45
Flights: 254
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s OO 3788, 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 3788 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 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 55 minutes. That rests on 254 flights, with a median arrival 9 minutes early.

Set against the rest of the country, OO 3788's record is 13 points better than the US average of 77.3%. That gap is worth roughly 132 fewer late arrivals for every thousand flights.

On time

90.5%

Arrivals under 15 minutes late, of 253 completed flights

Avg delay

54 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.89%

1 hour+ late

2.4%

National rate is 8.3%

These figures cover 254 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 3788 flies

OO 3788 flies SLC to COS without a single fixed slot. Its most common scheduled departure was 20:45, used on 122 of 254 flights, with 20:59 (56 flights) and 20:30 (36 flights) next.

Departs 20:45122 flights48.0%
Departs 20:5956 flights22.0%
Departs 20:3036 flights14.2%

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 20:45 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and OO 3788 runs 20 points better at 90.5%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

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Against the route

OO 3788 next to SLC to COS

Every carrier on SLC to COS combined arrived on time 91.9% of the time across 721 flights, so OO 3788 is about level with it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 12 points.

OO 3788 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3788thin sample	254	90.5%	54 min	0.00%	A+
All SkyWest Airlines on SLC–COS	721	91.9%	50 min	0.14%	A+
All carriers on SLC–COS	721	91.9%	50 min	0.14%	A+
SkyWest Airlines, whole network	855,406	78.7%	88 min	1.79%	B

Across the year

OO 3788 quarter by quarter

Quarter by quarter OO 3788 held fairly steady: 88.8% in Jan–Mar 2026, 93.4% in Apr–Jun 2026 and 86.9% in Jul–Sep 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.

Oct–Dec 202512 flights—
Jan–Mar 202690 flights88.8%
Apr–Jun 202691 flights93.4%
Jul–Sep 202661 flights86.9%

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

By weekday, OO 3788 did best on Friday at 97.2% on time and worst on Thursday at 82.9%. Each day rests on about 36 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late OO 3788 runs when it is late

OO 3788 often beats the schedule: 74 of 253 completed flights, 29%, arrived 15 minutes or more early. The 24 late arrivals split 10 under half an hour, 8 between 30 and 60 minutes, and 6 an hour or more.

15+ min early74 flights29.2%
Within 15 min155 flights61.3%
15–29 min late10 flights4.0%
30–59 min late8 flights3.2%
1–2 hours late3 flights1.2%
2+ hours late3 flights1.2%

Scale runs 0% to 100%.

Share of 253 completed flights by arrival against schedule.

7 of 25 late departures made up the time and arrived on time, 28% of them. 6 flights left on time and still arrived late.

The worst days

Worst days for OO 3788

The latest arrival of the period was on 29 July 2026, 4 hours 5 minutes behind schedule; most of its delay minutes were filed as extreme weather. Three of the five worst days fell in July 2026.

The latest arrivals of OO 3788 in the period
Date	Arrived late by	Largest filed cause
29 July 2026	4 hours 5 minutes	Extreme weather
12 July 2026	2 hours 7 minutes	Extreme weather
16 July 2026	2 hours 3 minutes	Carrier
12 April 2026	1 hour 51 minutes	Carrier
19 February 2026	1 hour 14 minutes	Extreme weather

Delay causes

Why OO 3788 runs late

Extreme weather accounts for 51% of the 1,284 delay minutes carriers reported here, and the remaining four split what is left.

Extreme weather
51%
Carrier
41%
National Airspace System
8%

Extreme weather accounts for 51% 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 8.4 times the usual weather exposure. The split is drawn from 1,284 delay minutes reported on OO 3788.

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 2.4% 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 same number turns up on five other city pairs in the data, including DTW to IAD (58), MSP to PIT (39) and DTW to GRR (8), but none flew often enough under OO 3788 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SLC to COS only.

One caution: this is a thin sample. 254 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 3788

For a booking, OO 3788 has one of the better records a US domestic flight can show: 90.5% 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