Flight number record
OO 4015
SkyWest Airlines · Indianapolis to Austin
- Route
- IND → AUS
- Departs
- 07:00
- Flights
- 358
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4015, 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 4015 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 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 358 flights, with a median arrival 9 minutes early.
Set against the rest of the country, OO 4015's record is 12 points better than the US average of 77.3%. That gap is worth roughly 117 fewer late arrivals for every thousand flights.
Key figures
On time
89.0%
Arrivals under 15 minutes late, of 356 completed flights
Avg delay
100 min
Across delayed arrivals only, not all flights
Cancelled
0.28%
National rate is 1.89%
1 hour+ late
4.8%
National rate is 8.3%
These figures cover 358 flights between September 2025 and August 2026. The median arrival is 9 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 4015 flies
OO 4015 flies IND to AUS without a single fixed slot. Its most common scheduled departure was 07:00, used on 137 of 358 flights, with 07:20 (70 flights) and 07:25 (52 flights) next.
- Departs 07:00137 flights38.3%
- Departs 07:2070 flights19.6%
- Departs 07:2552 flights14.5%
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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 4015 runs level with that at 89.0%. 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 4015 next to IND to AUS
Every carrier on IND to AUS combined arrived on time 84.8% of the time across 1,359 flights, so OO 4015 is 4 points ahead of it. SkyWest flew 552 flights on the same city pair under all its flight numbers, including this one, and those ran 87.3% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 10 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4015thin sample | 358 | 89.0% | 100 min | 0.28% | A+ |
| All SkyWest Airlines on IND–AUS | 552 | 87.3% | 96 min | 0.18% | A+ |
| All carriers on IND–AUS | 1,359 | 84.8% | 68 min | 0.22% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4015 quarter by quarter
OO 4015 did not run the same all year. Its best quarter was Jul–Sep 2025 at 100.0% on time and its weakest Jan–Mar 2026 at 86.5%, a swing of 14 points on roughly 72 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 202530 flights100.0%
- Oct–Dec 202592 flights87.9%
- Jan–Mar 202690 flights86.5%
- Apr–Jun 202688 flights87.5%
- Jul–Sep 202658 flights91.4%
Scale runs 80% to 100%.
By weekday, OO 4015 did best on Wednesday at 94.2% on time and worst on Monday at 79.2%. Each day rests on about 51 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4015 runs when it is late
OO 4015 often beats the schedule: 127 of 356 completed flights, 36%, arrived 15 minutes or more early. The 39 late arrivals split 10 under half an hour, 12 between 30 and 60 minutes, and 17 an hour or more.
- 15+ min early127 flights35.7%
- Within 15 min190 flights53.4%
- 15–29 min late10 flights2.8%
- 30–59 min late12 flights3.4%
- 1–2 hours late3 flights0.8%
- 2+ hours late14 flights3.9%
Scale runs 0% to 100%.
Share of 356 completed flights by arrival against schedule.
9 of 31 late departures made up the time and arrived on time, 29% of them. 17 flights left on time and still arrived late.
The worst days
Worst days for OO 4015
The latest arrival of the period was on 25 January 2026, 6 hours 28 minutes behind schedule; most of its delay minutes were filed as extreme weather. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 25 January 2026 | 6 hours 28 minutes | Extreme weather |
| 11 April 2026 | 5 hours 1 minute | Carrier |
| 3 March 2026 | 4 hours 27 minutes | Carrier |
| 28 July 2026 | 4 hours 3 minutes | Carrier |
| 10 June 2026 | 4 hours | Carrier |
Delay causes
Why OO 4015 runs late
Carrier accounts for 75% of the 3,892 delay minutes carriers reported here, and the remaining four split what is left.
- 75%Carrier
- 19%Extreme weather
- 6%National Airspace System
Extreme weather accounts for 19% 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 3.1 times the usual weather exposure. The split is drawn from 3,892 delay minutes reported on OO 4015.
Cancellations are rare at 0.28%, 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 4.8% 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 919 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.
Every one of the 358 flights under OO 4015 in the data flew IND to AUS. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 358 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 4015
For a booking, OO 4015 has one of the better records a US domestic flight can show: 89.0% on time and 0.28% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- IND to AUS, every carrier and departure
- AUS to IND, the return direction
- Indianapolis International (IND) 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.