Flight number record

OO 4177

SkyWest Airlines · Austin to McAllen

Route: AUS → MFE
Departs: 10:30
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4177, 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 4177 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 77.6%. When something does go wrong the average delay runs about an hour. That rests on 364 flights, with a median arrival 8 minutes early.

Set against the rest of the country, OO 4177's record is 7 points better than the US average of 77.6%. That gap is worth roughly 72 fewer late arrivals for every thousand flights.

On time

84.8%

Arrivals under 15 minutes late, of 363 completed flights

Avg delay

63 min

Across delayed arrivals only, not all flights

Cancelled

0.27%

National rate is 1.81%

1 hour+ late

6.3%

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 4177 flies

OO 4177 flies AUS to MFE without a single fixed slot. Its most common scheduled departure was 10:30, used on 114 of 364 flights, with 10:31 (41 flights) and 11:00 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:30114 flights31.3%
Departs 10:3141 flights11.3%
Departs 11:0038 flights10.4%

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 10:30 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 4177 runs level with that at 84.8%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

OO 4177 next to AUS to MFE

Every carrier on AUS to MFE combined arrived on time 82.7% of the time across 1,032 flights, so OO 4177 is 2 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 6 points.

OO 4177 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4177thin sample	364	84.8%	63 min	0.27%	B+
All SkyWest Airlines on AUS–MFE	1,032	82.7%	80 min	0.39%	B+
All carriers on AUS–MFE	1,032	82.7%	80 min	0.39%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4177 quarter by quarter

Quarter by quarter OO 4177 held fairly steady: 85.9% in Jul–Sep 2025, 86.8% in Oct–Dec 2025, 86.5% in Jan–Mar 2026 and 80.2% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights85.9%
Oct–Dec 202591 flights86.8%
Jan–Mar 202690 flights86.5%
Apr–Jun 202691 flights80.2%

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

By weekday, OO 4177 ranged from 78.4% on Saturday to 88.5% on Thursday. 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 4177 runs late

One category carries most of the weight here. Carrier accounts for 64% of the 3,448 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
64%
Extreme weather
26%
National Airspace System
9%

Extreme weather accounts for 26% 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 4.2 times the usual weather exposure. The split is drawn from 3,448 delay minutes reported on OO 4177.

Cancellations are rare at 0.27%, 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

6.3% 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 about an hour, which a normal layover absorbs.

OO 4177 is not only a AUS to MFE flight. It also flew MFE to AUS (343 flights, 82.6% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

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.

Other routes flown as OO 4177
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
MFE to AUSthin sample	343	82.6%	75 min	0.58%	B+

What to do with this

Booking OO 4177

For a booking, read OO 4177 as 84.8% on time with 0.27% 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