Flight number record

OO 5104

SkyWest Airlines · Denver to Sioux City

Route: DEN → SUX
Departs: 08:05
Flights: 325
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5104, 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 5104 lands a B, 6 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 an hour on average. That is a workable record, not a spotless one. That rests on 325 flights, with a median arrival 12 minutes early.

Set against the rest of the country, OO 5104's record is 6 points better than the US average of 77.6%. That gap is worth roughly 60 fewer late arrivals for every thousand flights.

On time

83.6%

Arrivals under 15 minutes late, of 318 completed flights

Avg delay

64 min

Across delayed arrivals only, not all flights

Cancelled

1.85%

National rate is 1.81%

1 hour+ late

5.3%

National rate is 8.1%

These figures cover 325 flights between July 2025 and June 2026. The median arrival is 12 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 5104 flies

OO 5104 flies DEN to SUX without a single fixed slot. Its most common scheduled departure was 08:05, used on 113 of 325 flights, with 15:40 (80 flights) and 15:35 (70 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:05113 flights34.8%
Departs 15:4080 flights24.6%
Departs 15:3570 flights21.5%

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 08:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 5104 runs level with that at 83.6%. 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 5104 next to DEN to SUX

Every carrier on DEN to SUX combined arrived on time 83.6% of the time across 500 flights, so OO 5104 is about level with it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 5 points.

OO 5104 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5104thin sample	325	83.6%	64 min	1.85%	B
All SkyWest Airlines on DEN–SUX	500	83.6%	77 min	1.60%	B
All carriers on DEN–SUX	500	83.6%	77 min	1.60%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5104 quarter by quarter

OO 5104 did not run the same all year. Its best quarter was Apr–Jun 2026 at 92.2% on time and its weakest Jul–Sep 2025 at 64.2%, a swing of 28 points on roughly 81 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 202555 flights64.2%
Oct–Dec 202590 flights80.7%
Jan–Mar 202689 flights89.7%
Apr–Jun 202691 flights92.2%

Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5104 did best on Tuesday at 89.4% on time and worst on Monday at 70.2%. Each day rests on about 46 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5104 runs late

One category carries most of the weight here. Carrier accounts for 44% of the 3,321 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
44%
National Airspace System
22%
Late-arriving aircraft
19%
Extreme weather
15%
Security
1%

Extreme weather accounts for 15% 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 2.4 times the usual weather exposure. The split is drawn from 3,321 delay minutes reported on OO 5104.

Cancellations sit at 1.85% against a national 1.81%, which is ordinary. Diversions add another 0.31%.

Connections and routes

What a delay on this flight costs

5.3% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

The same number turns up on five other city pairs in the data, including SUX to DEN (61), LAR to DEN (22) and SHR to DEN (6), but none flew often enough under OO 5104 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to SUX only.

One caution: this is a thin sample. 325 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 5104

For a booking, read OO 5104 as 83.6% on time with 1.85% cancelled over 325 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