Flight number record
OO 4709
SkyWest Airlines · Grand Junction to Denver
- Route
- GJT → DEN
- Departs
- 11:19
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4709, 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 4709 earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 364 flights, with a median arrival 9 minutes early.
Set against the rest of the country, OO 4709's record is 7 points better than the US average of 77.3%. That gap is worth roughly 70 fewer late arrivals for every thousand flights.
Key figures
On time
84.3%
Arrivals under 15 minutes late, of 356 completed flights
Avg delay
65 min
Across delayed arrivals only, not all flights
Cancelled
2.20%
National rate is 1.89%
1 hour+ late
4.5%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 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.
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Schedule
When OO 4709 flies
OO 4709 flies GJT to DEN without a single fixed slot. Its most common scheduled departure was 11:19, used on 79 of 364 flights, with 11:24 (67 flights) and 11:27 (50 flights) next.
- Departs 11:1979 flights21.7%
- Departs 11:2467 flights18.4%
- Departs 11:2750 flights13.7%
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 11:19 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and OO 4709 runs 6 points better at 84.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
OO 4709 next to GJT to DEN
Every carrier on GJT to DEN combined arrived on time 79.6% of the time across 2,282 flights, so OO 4709 is 5 points ahead of it. SkyWest flew 1,550 flights on the same city pair under all its flight numbers, including this one, and those ran 77.0% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4709thin sample | 364 | 84.3% | 65 min | 2.20% | B |
| All SkyWest Airlines on GJT–DEN | 1,550 | 77.0% | 80 min | 1.81% | B |
| All carriers on GJT–DEN | 2,282 | 79.6% | 75 min | 1.36% | B |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4709 quarter by quarter
OO 4709 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.0% on time and its weakest Apr–Jun 2026 at 80.0%, a swing of 10 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 flights90.0%
- Oct–Dec 202592 flights86.2%
- Jan–Mar 202690 flights83.0%
- Apr–Jun 202690 flights80.0%
- Jul–Sep 202662 flights86.9%
Scale runs 70% to 95%.
By weekday, OO 4709 ranged from 78.8% on Tuesday to 86.3% on Wednesday. With about 52 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late OO 4709 runs when it is late
OO 4709 often beats the schedule: 122 of 356 completed flights, 34%, arrived 15 minutes or more early. The 56 late arrivals split 24 under half an hour, 16 between 30 and 60 minutes, and 16 an hour or more.
- 15+ min early122 flights34.3%
- Within 15 min178 flights50.0%
- 15–29 min late24 flights6.7%
- 30–59 min late16 flights4.5%
- 1–2 hours late10 flights2.8%
- 2+ hours late6 flights1.7%
Scale runs 0% to 100%.
Share of 356 completed flights by arrival against schedule.
15 of 56 late departures made up the time and arrived on time, 27% of them. 15 flights left on time and still arrived late.
The worst days
Worst days for OO 4709
The latest arrival of the period was on 24 April 2026, 6 hours 58 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across April, February, June and October, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 April 2026 | 6 hours 58 minutes | Late-arriving aircraft |
| 17 February 2026 | 6 hours 15 minutes | National Airspace System |
| 24 February 2026 | 5 hours 5 minutes | National Airspace System |
| 25 June 2026 | 2 hours 49 minutes | Carrier |
| 27 October 2025 | 2 hours 23 minutes | Late-arriving aircraft |
Delay causes
Why OO 4709 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 3,633 reported delay minutes.
- 33%National Airspace System
- 30%Late-arriving aircraft
- 29%Carrier
- 7%Extreme weather
- 1%Security
33% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 1,213 minutes out of 3,633, against a national NAS share of 21%. The split is drawn from 3,633 delay minutes reported on OO 4709.
Cancellations sit at 2.20% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.5% 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 same number turns up on two other city pairs in the data, including DEN to FAR (21) and ORD to ATW (1), but none flew often enough under OO 4709 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to GJT 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 4709
For a booking, read OO 4709 as 84.3% on time with 2.20% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- GJT to DEN, every carrier and departure
- DEN to GJT, the return direction
- SkyWest Airlines 5755 on the same route64.3%
- SkyWest Airlines 4635 on the same route67.6%
- United Airlines 1877 on the same route86.3%
- SkyWest Airlines 4800 on the same route87.4%
- 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.