Flight number record

OO 4175

SkyWest Airlines · McAllen to Austin

Route: MFE → AUS
Departs: 05:25
Flights: 255
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4175, 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 4175 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 2.4 hours. That rests on 255 flights, with a median arrival 14 minutes early.

Set against the rest of the country, OO 4175's record is 16 points better than the US average of 77.3%. That gap is worth roughly 164 fewer late arrivals for every thousand flights.

On time

93.7%

Arrivals under 15 minutes late, of 253 completed flights

Avg delay

141 min

Across delayed arrivals only, not all flights

Cancelled

0.78%

National rate is 1.89%

1 hour+ late

3.2%

National rate is 8.3%

These figures cover 255 flights between September 2025 and August 2026. The median arrival is 14 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.

Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

Schedule

When OO 4175 flies

OO 4175 flies MFE to AUS without a single fixed slot. Its most common scheduled departure was 05:25, used on 145 of 255 flights, with 05:20 (86 flights) next.

Departs 05:25145 flights56.9%
Departs 05:2086 flights33.7%

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 05:25 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 4175 runs 4 points better at 93.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

Against the route

OO 4175 next to MFE to AUS

Every carrier on MFE to AUS combined arrived on time 87.1% of the time across 1,032 flights, so OO 4175 is 7 points ahead of it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 15 points.

OO 4175 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4175thin sample	255	93.7%	141 min	0.78%	A+
All SkyWest Airlines on MFE–AUS	1,032	87.1%	111 min	0.48%	A+
All carriers on MFE–AUS	1,032	87.1%	111 min	0.48%	A+
SkyWest Airlines, whole network	855,406	78.7%	88 min	1.79%	B

Across the year

OO 4175 quarter by quarter

Quarter by quarter OO 4175 held fairly steady: 95.5% in Jan–Mar 2026, 94.4% in Apr–Jun 2026 and 90.3% in Jul–Sep 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Oct–Dec 202512 flights—
Jan–Mar 202690 flights95.5%
Apr–Jun 202691 flights94.4%
Jul–Sep 202662 flights90.3%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4175 did best on Saturday at 100.0% on time and worst on Monday at 80.6%. Each day rests on about 36 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late OO 4175 runs when it is late

OO 4175 often beats the schedule: 124 of 253 completed flights, 49%, arrived 15 minutes or more early. The 16 late arrivals split 4 under half an hour, 4 between 30 and 60 minutes, and 8 an hour or more.

15+ min early124 flights49.0%
Within 15 min113 flights44.7%
15–29 min late4 flights1.6%
30–59 min late4 flights1.6%
1–2 hours late2 flights0.8%
2+ hours late6 flights2.4%

Scale runs 0% to 100%.

Share of 253 completed flights by arrival against schedule.

Only 9 of 253 completed flights left 15 minutes late or more, too few to say how often the time is made up.

The worst days

Worst days for OO 4175

The latest arrival of the period was on 7 August 2026, 7 hours 29 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.

The latest arrivals of OO 4175 in the period
Date	Arrived late by	Largest filed cause
7 August 2026	7 hours 29 minutes	Carrier
21 July 2026	7 hours 17 minutes	Carrier
29 April 2026	6 hours 33 minutes	Carrier
27 May 2026	4 hours 9 minutes	Carrier
27 January 2026	3 hours 15 minutes	Extreme weather

Delay causes

Why OO 4175 runs late

Carrier accounts for 88% of the 2,258 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
88%
Extreme weather
9%
National Airspace System
3%

The largest share of delay minutes, 88%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,983 of the 2,258 delay minutes reported here. The split is drawn from 2,258 delay minutes reported on OO 4175.

Cancellations are rare at 0.78%, below the national 1.89% 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

Badly late arrivals are rare here: only 3.2% 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 three other city pairs in the data, including DTW to HSV (21), BTR to ATL (4) and ATL to BTR (4), but none flew often enough under OO 4175 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MFE to AUS only.

One caution: this is a thin sample. 255 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 4175

For a booking, OO 4175 has one of the better records a US domestic flight can show: 93.7% on time and 0.78% cancelled. That is a base rate, not a promise about any single 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures