Flight number record
OO 5137
SkyWest Airlines · Hays to Denver
- Route
- HYS → DEN
- Departs
- 06:30
- Flights
- 318
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5137, 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 5137 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 3.6 hours. That rests on 318 flights, with a median arrival 16 minutes early.
Set against the rest of the country, OO 5137's record is 10 points better than the US average of 77.3%. That gap is worth roughly 102 fewer late arrivals for every thousand flights.
Key figures
On time
87.5%
Arrivals under 15 minutes late, of 312 completed flights
Avg delay
216 min
Across delayed arrivals only, not all flights
Cancelled
1.89%
National rate is 1.89%
1 hour+ late
9.0%
National rate is 8.3%
These figures cover 318 flights between September 2025 and August 2026. Beyond the headline rate, 9.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 5137 flies
OO 5137 flies HYS to DEN without a single fixed slot. Its most common scheduled departure was 06:30, used on 243 of 318 flights, with 06:35 (74 flights) next.
- Departs 06:30243 flights76.4%
- Departs 06:3574 flights23.3%
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 06:30 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 5137 runs level with that at 87.5%. 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 5137 next to HYS to DEN
Every carrier on HYS to DEN combined arrived on time 81.6% of the time across 589 flights, so OO 5137 is 6 points ahead of it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5137thin sample | 318 | 87.5% | 216 min | 1.89% | A |
| All SkyWest Airlines on HYS–DEN | 589 | 81.6% | 136 min | 2.21% | B |
| All carriers on HYS–DEN | 589 | 81.6% | 136 min | 2.21% | B |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5137 quarter by quarter
Quarter by quarter OO 5137 held fairly steady: 91.3% in Oct–Dec 2025, 85.1% in Jan–Mar 2026, 85.1% in Apr–Jun 2026 and 87.5% in Jul–Sep 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 20256 flights—
- Oct–Dec 202592 flights91.3%
- Jan–Mar 202689 flights85.1%
- Apr–Jun 202691 flights85.1%
- Jul–Sep 202640 flights87.5%
Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, OO 5137 did best on Thursday at 95.6% on time and worst on Tuesday at 80.0%. Each day rests on about 45 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5137 runs when it is late
OO 5137 often beats the schedule: 171 of 312 completed flights, 55%, arrived 15 minutes or more early. When OO 5137 is late it tends to be very late: 28 of its 39 late arrivals were an hour or more behind, and 25 were two hours or more.
- 15+ min early171 flights54.8%
- Within 15 min102 flights32.7%
- 15–29 min late8 flights2.6%
- 30–59 min late3 flights1.0%
- 1–2 hours late3 flights1.0%
- 2+ hours late25 flights8.0%
Scale runs 0% to 100%.
Share of 312 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 36 departures that left 15 minutes late or more, only 2 made it up before arrival. Only 5 left on time and still arrived late.
The worst days
Worst days for OO 5137
The latest arrival of the period was on 27 April 2026, 10 hours 27 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 27 April 2026 | 10 hours 27 minutes | Late-arriving aircraft |
| 28 December 2025 | 9 hours 20 minutes | Late-arriving aircraft |
| 2 June 2026 | 9 hours 18 minutes | Late-arriving aircraft |
| 21 November 2025 | 7 hours 2 minutes | Carrier |
| 10 July 2026 | 6 hours 28 minutes | Late-arriving aircraft |
Delay causes
Why OO 5137 runs late
Carrier accounts for 50% of the 8,424 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Carrier
- 44%Late-arriving aircraft
- 4%Extreme weather
- 2%National Airspace System
44% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 8,424 reported delay minutes here, that single category outweighs weather by 11 to one. The split is drawn from 8,424 delay minutes reported on OO 5137.
Cancellations sit at 1.89% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
9.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The same number turns up on one other city pair in the data, including DEN to COD (2), but none flew often enough under OO 5137 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to HYS to DEN only.
One caution: this is a thin sample. 318 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 5137
For a booking, read OO 5137 as 87.5% on time with 1.89% cancelled over 318 flights. Those are rates from the past twelve months, not a forecast for any particular 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
- Why the first flight of the morning is statistically safest
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.