Flight number record
OO 4088
SkyWest Airlines · Memphis to Austin
- Route
- MEM → AUS
- Departs
- 06:00
- Flights
- 251
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4088, 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 4088 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 13 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 251 flights, with a median arrival 10 minutes early.
Set against the rest of the country, OO 4088's record is 13 points better than the US average of 77.3%. That gap is worth roughly 130 fewer late arrivals for every thousand flights.
Key figures
On time
90.3%
Arrivals under 15 minutes late, of 247 completed flights
Avg delay
146 min
Across delayed arrivals only, not all flights
Cancelled
1.59%
National rate is 1.89%
1 hour+ late
4.5%
National rate is 8.3%
These figures cover 251 flights between September 2025 and August 2026. The median arrival is 10 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 4088 flies
OO 4088 flies MEM to AUS without a single fixed slot. Its most common scheduled departure was 06:00, used on 78 of 251 flights, with 06:05 (55 flights) and 06:45 (52 flights) next.
- Departs 06:0078 flights31.1%
- Departs 06:0555 flights21.9%
- Departs 06:4552 flights20.7%
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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 4088 runs level with that at 90.3%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
OO 4088 next to MEM to AUS
Every carrier on MEM to AUS combined arrived on time 91.0% of the time across 361 flights, so OO 4088 is about level with it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4088thin sample | 251 | 90.3% | 146 min | 1.59% | A |
| All SkyWest Airlines on MEM–AUSthin sample | 361 | 91.0% | 121 min | 1.11% | A |
| All carriers on MEM–AUSthin sample | 361 | 91.0% | 121 min | 1.11% | A |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4088 quarter by quarter
Quarter by quarter OO 4088 held fairly steady: 90.8% in Jan–Mar 2026, 90.1% in Apr–Jun 2026 and 89.7% in Jul–Sep 2026. A spread of about a point 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 flights90.8%
- Apr–Jun 202691 flights90.1%
- Jul–Sep 202658 flights89.7%
Scale runs 80% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, OO 4088 did best on Monday at 97.1% on time and worst on Thursday at 83.3%. Each day rests on about 36 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4088 runs when it is late
OO 4088 often beats the schedule: 87 of 247 completed flights, 35%, arrived 15 minutes or more early. The 24 late arrivals split 10 under half an hour, 3 between 30 and 60 minutes, and 11 an hour or more.
- 15+ min early87 flights35.2%
- Within 15 min136 flights55.1%
- 15–29 min late10 flights4.0%
- 30–59 min late3 flights1.2%
- 1–2 hours late4 flights1.6%
- 2+ hours late7 flights2.8%
Scale runs 0% to 100%.
Share of 247 completed flights by arrival against schedule.
6 of 23 late departures made up the time and arrived on time, 26% of them. 7 flights left on time and still arrived late.
The worst days
Worst days for OO 4088
The latest arrival of the period was on 2 May 2026, 17 hours 3 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 2 May 2026 | 17 hours 3 minutes | Carrier |
| 12 July 2026 | 8 hours 35 minutes | Carrier |
| 3 July 2026 | 7 hours 50 minutes | Carrier |
| 28 July 2026 | 4 hours 57 minutes | Carrier |
| 24 December 2025 | 3 hours 6 minutes | Carrier |
Delay causes
Why OO 4088 runs late
Carrier accounts for 93% of the 3,493 delay minutes carriers reported here, and the remaining four split what is left.
- 93%Carrier
- 5%National Airspace System
- 2%Extreme weather
The largest share of delay minutes, 93%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,257 of the 3,493 delay minutes reported here. The split is drawn from 3,493 delay minutes reported on OO 4088.
Cancellations sit at 1.59% 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 559 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The same number turns up on two other city pairs in the data, including TVC to DTW (101) and DTW to TVC (101), but none flew often enough under OO 4088 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MEM to AUS only.
One caution: this is a thin sample. 251 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 4088
For a booking, read OO 4088 as 90.3% on time with 1.59% cancelled over 251 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- Memphis International (MEM) delay statistics
- Austin-Bergstrom International (AUS) 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.