Route reliability record
AUS→IND
Austin to Indianapolis
- Flights
- 1,359
- Period
- September 2025 to August 2026
- Distance
- 919 mi
- Carriers
- 2
This route lands a B+, about a point better than the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 1,359 AUS to IND flights, of which SkyWest Airlines flew 552 at 80.9% on time.
Best time to fly AUS to IND: a 8am–11am departure, ideally on a Saturday. Flights in that window arrived on time 93.5% of the time and Saturday flights 89.4%, against 78.2% for the route overall.
The US average over the same twelve months is 77.3%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
78.2%
Arrivals under 15 minutes late, of 1,351 completed flights
Avg delay
66 min
Across delayed arrivals only, not all flights
Cancelled
0.52%
National rate is 1.89%
Best carrier
SkyWest
80.9% on time across 552 flights
These figures cover 1,359 flights between September 2025 and August 2026. The median arrival is 3 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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Carrier by carrier
Which airline is most reliable on AUS to IND
The two carriers here are closely matched: 5 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines | 552 | 80.9% | 90 min | 0.36% | B+ |
| Southwest Airlines | 807 | 76.3% | 53 min | 0.62% | B+ |
No carrier stands out. SkyWest tops the table at 80.9%, 5 points clear of the bottom, which is inside the range this kind of sample moves year to year.
Flight by flight
Flights on AUS to IND
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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Best ways to make this trip
The most reliable ways to fly Austin to Indianapolis
Every airline on this route, ranked by how often a scheduled flight actually operated and arrived on time, with its best departure time and most punctual flight number. No nearby airport pair beat these.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. AUS → INDAustin to Indianapolis | SkyWest Airlines | 80.6% | 80.9% | 0.36% | 5am–8am, Wed | OO 3731 19:15 |
| 2. AUS → INDAustin to Indianapolis | Southwest Airlines | 75.8% | 76.3% | 0.62% | 5am–8am, Sat | — |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 28 points, against 5 points between the best and worst carrier.
- 5am–8am247 flights90.3%
- 8am–11am172 flights93.5%
- 11am–2pm78 flights84.4%
- 2pm–5pm235 flights73.6%
- 5pm–8pm373 flights73.0%
- 8pm–5am254 flights65.7%
Scale runs 55% to 100%.
Book the morning departure. Flights leaving between 8am–11am arrive on time 93.5% of the time, against 65.7% for the overnight window. That is 28 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5pm–8pm window is the busiest, with 373 flights scheduled in it.
Explore
Filter AUS to IND by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On AUS to IND, the best departure window is 8am–11am at 93.5% on time and the worst is 8pm–5am at 65.7%, a wide gap of 27.8 points. All US flights leaving 8am–11am ran 83.9%.
- 5–8am90.3%
- 8–11am93.5%
- 11am–2pm84.4%
- 2–5pm73.6%
- 5–8pm73.0%
- 8pm–5am65.7%
best all US flightsScale 55% to 100%.
Across the year
When delays peak on this route
This route's year swings by 20 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
Delays peak in October, when the on-time rate falls to 70.7%. January is the strongest month at 90.3%. Moving a flexible trip across that boundary buys 20 points. July was the busiest month here, with 173 flights.
Across the week, Saturday is the strongest day at 89.4% on time and Monday the weakest at 70.6%, a spread of 19 points.
Delay causes
Why this route gets delayed
Carrier accounts for 49% of the 19,000 delay minutes carriers reported here, and the remaining four split what is left.
- 49%Carrier
- 31%Late-arriving aircraft
- 15%National Airspace System
- 6%Extreme weather
- 0%Security
The largest share of delay minutes, 49%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 9,448 of the 19,000 delay minutes reported here. The split is drawn from 19,457 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 93.5% on time here.
Cancellations are rare at 0.52%, 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 stage length
What a delay here actually costs
7.4% of arrivals land an hour or more late, close to the national 8.3%, so 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.
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.
The return leg is a different operation and performs like one: it runs 84.8% on time across 1,359 flights, 7 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 7 points of difference.
The sample behind these figures is 1,359 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in IND after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. January runs 90.3% on time and October 70.7%, a swing of 20 points. If the dates move at all, move them out of October before you think about anything else. 1,351 completed flights over 12 months sit behind that.
Common questions
AUS to IND questions
How often is AUS to IND delayed?
Roughly one flight in five arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 21.8% of the 1,359 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.
Which airline is most reliable on AUS to IND?
SkyWest Airlines leads at 80.9% on time across 552 flights. Southwest Airlines is at the other end on 76.3%, a gap of 5 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on AUS to IND?
The 8am–11am departure window is the strongest at 93.5% on time. The 8pm–5am window is the weakest at 65.7%, 28 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are October delays on AUS to IND?
October is the weakest month at 70.7% on time, compared with 90.3% in January. Across the year that is 20 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- IND to AUS — the return legseparate record
- Austin-Bergstrom International (AUS) delay statistics
- Indianapolis International (IND) delay statistics
- SkyWest Airlines on AUS to IND80.9%
- Southwest Airlines on AUS to IND76.3%
- AUS to DEN, a related route78.9%
- ORD to IND, a related route74.1%
- AUS to DFW, a related route74.9%
- SkyWest Airlines on-time record80.9%
- Southwest Airlines on-time record76.3%
- The best time of day to fly, according to 7.05 million flight records
- Worst months to fly in the US, ranked by the data
Direction matters. AUS to IND and IND to AUS are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.