Flight number record

OO 4015

SkyWest Airlines · Indianapolis to Austin

Route: IND → AUS
Departs: 07:00
Flights: 362
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 362 flights, with a median arrival 8 minutes early.

Set against the rest of the country, OO 4015's record is 12 points better than the US average of 77.6%. That gap is worth roughly 118 fewer late arrivals for every thousand flights.

On time

89.4%

Arrivals under 15 minutes late, of 359 completed flights

Avg delay

89 min

Across delayed arrivals only, not all flights

Cancelled

0.28%

National rate is 1.81%

1 hour+ late

4.2%

National rate is 8.1%

These figures cover 362 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 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 362 flights, with 07:20 (105 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:00137 flights37.8%
Departs 07:20105 flights29.0%

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 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 89.4%. 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 4015 next to IND to AUS

Every carrier on IND to AUS combined arrived on time 83.4% of the time across 1,177 flights, so OO 4015 is 6 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 10 points.

OO 4015 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4015thin sample	362	89.4%	89 min	0.28%	A+
All SkyWest Airlines on IND–AUS	454	88.2%	83 min	0.22%	A+
All carriers on IND–AUS	1,177	83.4%	61 min	0.25%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4015 quarter by quarter

Quarter by quarter OO 4015 held fairly steady: 95.6% in Jul–Sep 2025, 87.9% in Oct–Dec 2025, 86.5% in Jan–Mar 2026 and 87.5% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights95.6%
Oct–Dec 202592 flights87.9%
Jan–Mar 202690 flights86.5%
Apr–Jun 202688 flights87.5%

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

By weekday, OO 4015 did best on Tuesday at 94.2% on time and worst on Monday at 80.8%. Each day rests on about 52 flights, so a gap of 13 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4015 runs late

One category carries most of the weight here. Carrier accounts for 71% of the 3,381 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
71%
Extreme weather
22%
National Airspace System
7%

Extreme weather accounts for 22% 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 3.6 times the usual weather exposure. The split is drawn from 3,381 delay minutes reported on OO 4015.

Cancellations are rare at 0.28%, 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

Badly late arrivals are rare here: only 4.2% land an hour or more behind schedule, against 8.1% 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

Every one of the 362 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. 362 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: 89.4% on time and 0.28% 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures