Flight number record

OO 4709

SkyWest Airlines · Grand Junction to Denver

Route: GJT → DEN
Departs: 11:29
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 lands a B, 5 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 a little over an hour on average. That is a workable record, not a spotless one. That rests on 364 flights, with a median arrival 8 minutes early.

Set against the rest of the country, OO 4709's record is 5 points better than the US average of 77.6%. That gap is worth roughly 50 fewer late arrivals for every thousand flights.

On time

82.6%

Arrivals under 15 minutes late, of 357 completed flights

Avg delay

68 min

Across delayed arrivals only, not all flights

Cancelled

1.92%

National rate is 1.81%

1 hour+ late

5.0%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 2026. The median arrival is 8 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 4709 flies

OO 4709 flies GJT to DEN without a single fixed slot. Its most common scheduled departure was 11:29, used on 67 of 364 flights, with 11:24 (67 flights) and 11:27 (50 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 11:2967 flights18.4%
Departs 11:2467 flights18.4%
Departs 11:2750 flights13.7%

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 11:29 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 4709 runs 4 points better at 82.6%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 4709 next to GJT to DEN

Every carrier on GJT to DEN combined arrived on time 77.6% of the time across 2,229 flights, so OO 4709 is 5 points ahead of it. SkyWest flew 1,496 flights on the same city pair under all its flight numbers, including this one, and those ran 75.5% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 4 points.

OO 4709 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4709thin sample	364	82.6%	68 min	1.92%	B
All SkyWest Airlines on GJT–DEN	1,496	75.5%	78 min	2.01%	B
All carriers on GJT–DEN	2,229	77.6%	75 min	1.48%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4709 quarter by quarter

Quarter by quarter OO 4709 held fairly steady: 81.5% in Jul–Sep 2025, 86.2% in Oct–Dec 2025, 83.0% in Jan–Mar 2026 and 80.0% in Apr–Jun 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 202592 flights81.5%
Oct–Dec 202592 flights86.2%
Jan–Mar 202690 flights83.0%
Apr–Jun 202690 flights80.0%

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4709 ranged from 77.4% on Tuesday to 87.8% on Friday. With about 52 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.

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 4,219 reported delay minutes.

Carrier
36%
National Airspace System
30%
Late-arriving aircraft
28%
Extreme weather
6%
Security
1%

The largest share of delay minutes, 36%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,502 of the 4,219 delay minutes reported here. The split is drawn from 4,219 delay minutes reported on OO 4709.

Cancellations sit at 1.92% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

5.0% 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 a little over an hour, which a normal layover absorbs.

The same number turns up on one other city pair in the data, including 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 82.6% on time with 1.92% cancelled over 364 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