Flight number record
OO 5924
SkyWest Airlines · Boise to Denver
- Route
- BOI → DEN
- Departs
- 05:00
- Flights
- 268
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5924, 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 5924 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 an hour and a half. That rests on 268 flights, with a median arrival 17 minutes early.
Set against the rest of the country, OO 5924's record is 13 points better than the US average of 77.3%. That gap is worth roughly 134 fewer late arrivals for every thousand flights.
Key figures
On time
90.7%
Arrivals under 15 minutes late, of 268 completed flights
Avg delay
85 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
3.7%
National rate is 8.3%
These figures cover 268 flights between September 2025 and August 2026. The median arrival is 17 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 5924 flies
OO 5924 is scheduled to leave Boise (BOI) at 05:00 local time and reach Denver (DEN) at 07:05. That slot held for 267 of the 268 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.
- Departs 05:00267 flights99.6%
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 05:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 5924 runs level with that at 90.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
OO 5924 next to BOI to DEN
Every carrier on BOI to DEN combined arrived on time 81.7% of the time across 3,034 flights, so OO 5924 is 9 points ahead of it. SkyWest flew 895 flights on the same city pair under all its flight numbers, including this one, and those ran 86.6% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5924thin sample | 268 | 90.7% | 85 min | 0.00% | A+ |
| All SkyWest Airlines on BOI–DEN | 895 | 86.6% | 93 min | 0.00% | A+ |
| All carriers on BOI–DEN | 3,034 | 81.7% | 82 min | 0.13% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5924 quarter by quarter
Quarter by quarter OO 5924 held fairly steady: 88.3% in Oct–Dec 2025, 90.4% in Jan–Mar 2026, 90.1% in Apr–Jun 2026 and 93.3% in Jul–Sep 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 20255 flights—
- Oct–Dec 202560 flights88.3%
- Jan–Mar 202652 flights90.4%
- Apr–Jun 202691 flights90.1%
- Jul–Sep 202660 flights93.3%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, OO 5924 ranged from 87.8% on Sunday to 92.7% on Friday. With about 38 flights behind each day, a spread of 5 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late OO 5924 runs when it is late
OO 5924 often beats the schedule: 145 of 268 completed flights, 54%, arrived 15 minutes or more early. The 25 late arrivals split 10 under half an hour, 5 between 30 and 60 minutes, and 10 an hour or more.
- 15+ min early145 flights54.1%
- Within 15 min98 flights36.6%
- 15–29 min late10 flights3.7%
- 30–59 min late5 flights1.9%
- 1–2 hours late6 flights2.2%
- 2+ hours late4 flights1.5%
Scale runs 0% to 100%.
Share of 268 completed flights by arrival against schedule.
7 of 26 late departures made up the time and arrived on time, 27% of them. 6 flights left on time and still arrived late.
The worst days
Worst days for OO 5924
The latest arrival of the period was on 4 August 2026, 9 hours 13 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 4 August 2026 | 9 hours 13 minutes | National Airspace System |
| 7 November 2025 | 5 hours 34 minutes | Carrier |
| 21 February 2026 | 2 hours 42 minutes | Carrier |
| 26 October 2025 | 2 hours 15 minutes | Carrier |
| 18 February 2026 | 1 hour 55 minutes | Carrier |
Delay causes
Why OO 5924 runs late
Carrier accounts for 71% of the 2,121 delay minutes carriers reported here, and the remaining four split what is left.
- 71%Carrier
- 29%National Airspace System
The largest share of delay minutes, 71%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,510 of the 2,121 delay minutes reported here. The split is drawn from 2,121 delay minutes reported on OO 5924.
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 3.7% 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 649 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.
Every one of the 268 flights under OO 5924 in the data flew BOI to DEN. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 268 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 5924
For a booking, OO 5924 has one of the better records a US domestic flight can show: 90.7% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- BOI to DEN, every carrier and departure
- DEN to BOI, the return direction
- United Airlines 1782 on the same route91.1%
- United Airlines 2173 on the same route76.3%
- Denver International (DEN) delay statistics
- SkyWest Airlines on-time record
- Every SkyWest Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
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 ; recomputed monthly. How this data is collected.