Flight number record

OO 6311

SkyWest Airlines · Provo to Phoenix

Route: PVU → PHX
Departs: 16:07
Flights: 270
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 6311, 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 6311 lands a B+, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That is a workable record, not a spotless one. That rests on 270 flights, with a median arrival 10 minutes early.

On time

81.0%

Arrivals under 15 minutes late, of 269 completed flights

Avg delay

108 min

Across delayed arrivals only, not all flights

Cancelled

0.37%

National rate is 1.81%

1 hour+ late

8.9%

National rate is 8.1%

These figures cover 270 flights between July 2025 and June 2026. Beyond the headline rate, 8.9% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When OO 6311 flies

OO 6311 flies PVU to PHX without a single fixed slot. Its most common scheduled departure was 16:07, used on 39 of 270 flights, with 14:01 (39 flights) and 15:24 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 16:0739 flights14.4%
Departs 14:0139 flights14.4%
Departs 15:2435 flights13.0%

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 16:07 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and OO 6311 runs 9 points better at 81.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 6311 next to PVU to PHX

Every carrier on PVU to PHX combined arrived on time 80.2% of the time across 284 flights, so OO 6311 is about level with it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 2 points.

OO 6311 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 6311thin sample	270	81.0%	108 min	0.37%	B+
All SkyWest Airlines on PVU–PHXthin sample	284	80.2%	112 min	0.35%	B+
All carriers on PVU–PHXthin sample	284	80.2%	112 min	0.35%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 6311 quarter by quarter

OO 6311 did not run the same all year. Its best quarter was Oct–Dec 2025 at 86.0% on time and its weakest Jul–Sep 2025 at 73.1%, a swing of 13 points on roughly 68 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 202568 flights73.1%
Oct–Dec 202543 flights86.0%
Jan–Mar 202671 flights81.7%
Apr–Jun 202688 flights84.1%

Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, OO 6311 did best on Friday at 87.5% on time and worst on Thursday at 73.9%. Each day rests on about 39 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 6311 runs late

One category carries most of the weight here. Carrier accounts for 68% of the 5,493 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
68%
Late-arriving aircraft
14%
National Airspace System
12%
Extreme weather
6%

The largest share of delay minutes, 68%, 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 3,717 of the 5,493 delay minutes reported here. The split is drawn from 5,493 delay minutes reported on OO 6311.

Cancellations are rare at 0.37%, below the national 1.81% 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

8.9% 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 close to two hours, which a normal layover absorbs.

The same number turns up on two other city pairs in the data, including PHX to PVU (40) and MKE to ORD (27), but none flew often enough under OO 6311 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to PVU to PHX only.

One caution: this is a thin sample. 270 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 6311

For a booking, read OO 6311 as 81.0% on time with 0.37% cancelled over 270 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