Flight number record

OO 5488

SkyWest Airlines · Denver to Grand Junction

Route: DEN → GJT
Departs: 13:25
Flights: 315
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5488, 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 5488 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 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 315 flights, with a median arrival 10 minutes early.

Set against the rest of the country, OO 5488's record is 9 points better than the US average of 77.6%. That gap is worth roughly 87 fewer late arrivals for every thousand flights.

On time

86.3%

Arrivals under 15 minutes late, of 306 completed flights

Avg delay

49 min

Across delayed arrivals only, not all flights

Cancelled

2.86%

National rate is 1.81%

1 hour+ late

4.2%

National rate is 8.1%

These figures cover 315 flights between July 2025 and June 2026. The median arrival is 10 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 5488 flies

OO 5488 flies DEN to GJT without a single fixed slot. Its most common scheduled departure was 13:25, used on 126 of 315 flights, with 13:35 (54 flights) and 13:34 (45 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:25126 flights40.0%
Departs 13:3554 flights17.1%
Departs 13:3445 flights14.3%

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 13:25 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 5488 runs 8 points better at 86.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 5488 next to DEN to GJT

Every carrier on DEN to GJT combined arrived on time 79.5% of the time across 2,229 flights, so OO 5488 is 7 points ahead of it. SkyWest flew 1,496 flights on the same city pair under all its flight numbers, including this one, and those ran 80.5% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 7 points.

OO 5488 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5488thin sample	315	86.3%	49 min	2.86%	A
All SkyWest Airlines on DEN–GJT	1,496	80.5%	62 min	1.74%	B
All carriers on DEN–GJT	2,229	79.5%	65 min	1.21%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5488 quarter by quarter

OO 5488 did not run the same all year. Its best quarter was Oct–Dec 2025 at 95.7% on time and its weakest Apr–Jun 2026 at 82.4%, a swing of 13 points on roughly 79 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Jul–Sep 202559 flights83.1%
Oct–Dec 202575 flights95.7%
Jan–Mar 202690 flights85.1%
Apr–Jun 202691 flights82.4%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5488 did best on Sunday at 95.5% on time and worst on Friday at 78.6%. Each day rests on about 45 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5488 runs late

One category carries most of the weight here. Carrier accounts for 47% of the 2,049 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
47%
National Airspace System
27%
Late-arriving aircraft
21%
Extreme weather
4%

The largest share of delay minutes, 47%, 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 973 of the 2,049 delay minutes reported here. The split is drawn from 2,049 delay minutes reported on OO 5488.

Cancellations run at 2.86%, against 1.81% nationally. That is roughly one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.2% 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 two other city pairs in the data, including SNA to SFO (31) and ORD to ABE (15), but none flew often enough under OO 5488 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to GJT only.

One caution: this is a thin sample. 315 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 5488

For a booking, the cancellation rate is the figure to plan around on OO 5488: 2.86% of its 315 scheduled flights did not operate. A late arrival costs roughly 50 minutes, but a cancellation costs the day, so leave a later option open.

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