Flight number record

OO 5343

SkyWest Airlines · Denver to Gunnison

Route: DEN → GUC
Departs: 11:30
Flights: 316
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5343, 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 5343 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 316 flights, with a median arrival 6 minutes early.

Set against the rest of the country, OO 5343's record is 7 points better than the US average of 77.6%. That gap is worth roughly 74 fewer late arrivals for every thousand flights.

On time

85.0%

Arrivals under 15 minutes late, of 313 completed flights

Avg delay

51 min

Across delayed arrivals only, not all flights

Cancelled

0.63%

National rate is 1.81%

1 hour+ late

4.5%

National rate is 8.1%

These figures cover 316 flights between July 2025 and June 2026. The median arrival is 6 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 5343 flies

OO 5343 flies DEN to GUC without a single fixed slot. Its most common scheduled departure was 11:30, used on 222 of 316 flights, with 11:45 (53 flights) and 11:35 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 11:30222 flights70.3%
Departs 11:4553 flights16.8%
Departs 11:3535 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 11:30 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 5343 runs 6 points better at 85.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 5343 next to DEN to GUC

Every carrier on DEN to GUC combined arrived on time 81.3% of the time across 995 flights, so OO 5343 is 4 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 6 points.

OO 5343 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5343thin sample	316	85.0%	51 min	0.63%	A+
All SkyWest Airlines on DEN–GUC	995	81.3%	95 min	0.80%	B+
All carriers on DEN–GUC	995	81.3%	95 min	0.80%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5343 quarter by quarter

Quarter by quarter OO 5343 held fairly steady: 90.7% in Jul–Sep 2025, 82.4% in Oct–Dec 2025, 84.1% in Jan–Mar 2026 and 85.7% in Apr–Jun 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202543 flights90.7%
Oct–Dec 202592 flights82.4%
Jan–Mar 202690 flights84.1%
Apr–Jun 202691 flights85.7%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5343 ranged from 80.0% on Thursday to 90.9% on Saturday. With about 45 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 5343 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 2,407 reported delay minutes.

Carrier
38%
National Airspace System
29%
Late-arriving aircraft
29%
Extreme weather
4%

The largest share of delay minutes, 38%, 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 914 of the 2,407 delay minutes reported here. The split is drawn from 2,407 delay minutes reported on OO 5343.

Cancellations are rare at 0.63%, 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 4.5% 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 same number turns up on one other city pair in the data, including ICT to ORD (49), but none flew often enough under OO 5343 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to GUC only.

One caution: this is a thin sample. 316 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 5343

For a booking, OO 5343 has one of the better records a US domestic flight can show: 85.0% on time and 0.63% 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