Flight number record

OO 5985

SkyWest Airlines · Denver to Birmingham

Route: DEN → BHM
Departs: 10:10
Flights: 302
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5985, 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 5985 lands a B+, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about 50 minutes on average. That is a workable record, not a spotless one. That rests on 302 flights, with a median arrival 9 minutes early.

Set against the rest of the country, OO 5985's record is 5 points better than the US average of 77.6%. That gap is worth roughly 48 fewer late arrivals for every thousand flights.

On time

82.4%

Arrivals under 15 minutes late, of 301 completed flights

Avg delay

49 min

Across delayed arrivals only, not all flights

Cancelled

0.33%

National rate is 1.81%

1 hour+ late

4.7%

National rate is 8.1%

These figures cover 302 flights between July 2025 and June 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.

Schedule

When OO 5985 flies

OO 5985 flies DEN to BHM without a single fixed slot. Its most common scheduled departure was 10:10, used on 108 of 302 flights, with 10:07 (67 flights) and 10:03 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:10108 flights35.8%
Departs 10:0767 flights22.2%
Departs 10:0337 flights12.3%

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 10:10 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 5985 runs level with that at 82.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

OO 5985 next to DEN to BHM

Every carrier on DEN to BHM combined arrived on time 73.8% of the time across 1,192 flights, so OO 5985 is 9 points ahead of it. SkyWest flew 667 flights on the same city pair under all its flight numbers, including this one, and those ran 80.3% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 3 points.

OO 5985 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5985thin sample	302	82.4%	49 min	0.33%	B+
All SkyWest Airlines on DEN–BHM	667	80.3%	66 min	0.30%	B+
All carriers on DEN–BHM	1,192	73.8%	59 min	0.50%	C+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5985 quarter by quarter

Quarter by quarter OO 5985 held fairly steady: 79.1% in Jul–Sep 2025, 78.3% in Oct–Dec 2025 and 86.5% in Jan–Mar 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 202591 flights79.1%
Oct–Dec 202592 flights78.3%
Jan–Mar 202690 flights86.5%
Apr–Jun 202629 flights—

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5985 did best on Tuesday at 93.2% on time and worst on Sunday at 76.7%. Each day rests on about 43 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5985 runs late

One category carries most of the weight here. Carrier accounts for 60% of the 2,607 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
60%
Late-arriving aircraft
32%
National Airspace System
5%
Extreme weather
3%

The largest share of delay minutes, 60%, 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 1,576 of the 2,607 delay minutes reported here. The split is drawn from 2,607 delay minutes reported on OO 5985.

Cancellations are rare at 0.33%, 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 4.7% 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 1,083 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 two other city pairs in the data, including ORD to IND (36) and PWM to ORD (20), but none flew often enough under OO 5985 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to BHM only.

One caution: this is a thin sample. 302 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 5985

For a booking, read OO 5985 as 82.4% on time with 0.33% cancelled over 302 flights. Those are rates from the past twelve months, not a forecast for any particular 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