Flight number record
OO 5109
SkyWest Airlines · Salina to Denver
- Route
- SLN → DEN
- Departs
- 06:25
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5109, 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 5109 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 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 2.3 hours. That rests on 364 flights, with a median arrival 14 minutes early.
Set against the rest of the country, OO 5109's record is 10 points better than the US average of 77.3%. That gap is worth roughly 97 fewer late arrivals for every thousand flights.
Key figures
On time
87.0%
Arrivals under 15 minutes late, of 362 completed flights
Avg delay
136 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
1 hour+ late
7.5%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 14 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 5109 flies
OO 5109 flies SLN to DEN without a single fixed slot. Its most common scheduled departure was 06:25, used on 106 of 364 flights, with 06:30 (84 flights) and 06:20 (54 flights) next.
- Departs 06:25106 flights29.1%
- Departs 06:3084 flights23.1%
- Departs 06:2054 flights14.8%
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 06:25 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 5109 runs 2 points worse at 87.0%. 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 5109 next to SLN to DEN
Every carrier on SLN to DEN combined arrived on time 86.8% of the time across 365 flights, so OO 5109 is about level with it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5109thin sample | 364 | 87.0% | 136 min | 0.55% | A+ |
| All SkyWest Airlines on SLN–DEN | 365 | 86.8% | 134 min | 0.55% | A+ |
| All carriers on SLN–DEN | 365 | 86.8% | 134 min | 0.55% | A+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5109 quarter by quarter
OO 5109 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Oct–Dec 2025 at 68.5%, a swing of 28 points on roughly 73 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 202530 flights96.7%
- Oct–Dec 202592 flights68.5%
- Jan–Mar 202689 flights89.9%
- Apr–Jun 202691 flights93.4%
- Jul–Sep 202662 flights96.7%
Scale runs 60% to 100%.
By weekday, OO 5109 did best on Sunday at 94.2% on time and worst on Monday at 79.2%. Each day rests on about 52 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5109 runs when it is late
OO 5109 often beats the schedule: 175 of 362 completed flights, 48%, arrived 15 minutes or more early. When OO 5109 is late it tends to be very late: 27 of its 47 late arrivals were an hour or more behind, and 21 were two hours or more.
- 15+ min early175 flights48.3%
- Within 15 min140 flights38.7%
- 15–29 min late10 flights2.8%
- 30–59 min late10 flights2.8%
- 1–2 hours late6 flights1.7%
- 2+ hours late21 flights5.8%
Scale runs 0% to 100%.
Share of 362 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 46 departures that left 15 minutes late or more, only 3 made it up before arrival. Only 4 left on time and still arrived late.
The worst days
Worst days for OO 5109
The latest arrival of the period was on 1 December 2025, 9 hours 50 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in December 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 1 December 2025 | 9 hours 50 minutes | Carrier |
| 19 December 2025 | 5 hours 45 minutes | Carrier |
| 18 May 2026 | 4 hours 47 minutes | Carrier |
| 24 July 2026 | 4 hours 43 minutes | Extreme weather |
| 2 December 2025 | 4 hours 35 minutes | Late-arriving aircraft |
Delay causes
Why OO 5109 runs late
Carrier accounts for 75% of the 6,394 delay minutes carriers reported here, and the remaining four split what is left.
- 75%Carrier
- 11%Extreme weather
- 9%National Airspace System
- 4%Late-arriving aircraft
Extreme weather accounts for 11% 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 1.9 times the usual weather exposure. The split is drawn from 6,394 delay minutes reported on OO 5109.
Cancellations are rare at 0.55%, below the national 1.89% 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
7.5% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 2.3 hours, which a normal layover absorbs.
The same number turns up on two other city pairs in the data, including DEN to BFF (16) and DEN to CYS (2), but none flew often enough under OO 5109 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SLN to DEN only.
One caution: this is a thin sample. 364 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 5109
For a booking, OO 5109 has one of the better records a US domestic flight can show: 87.0% on time and 0.55% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- 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.