Carrier route record
DLATL→IND
Delta Air Lines · Atlanta to Indianapolis
- Flights
- 2,711
- Period
- July 2025 to June 2026
- Share of route
- 85%
- Carriers
- 5
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on ATL to IND earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 6 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 2,711 flights, with a median arrival 7 minutes early.
Set against the rest of the country, Delta's ATL to IND record is 6 points better than the US average of 77.6%. That gap is worth roughly 64 fewer late arrivals for every thousand flights.
Key figures
On time
84.0%
Arrivals under 15 minutes late, of 2,667 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
1.48%
National rate is 1.81%
Whole route
82.7%
Every carrier on ATL to IND, 3,190 flights
These figures cover 2,711 flights between July 2025 and June 2026. The median arrival is 7 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.
Carrier by carrier
Delta against every carrier on ATL to IND
Delta flew 2,711 of the 3,190 flights on ATL to IND, most of the route. Its 84.0% on time is about level with the route as a whole at 82.7%. Ranked by on-time rate it is first of five carriers on the route, where the range runs from Delta at 84.0% to American at 0.0%. Four of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines (this page) | 2,711 | 84.0% | 55 min | 1.48% | B |
| Southwest Airlinesthin sample | 330 | 79.5% | 53 min | 0.61% | B+ |
| Spirit Airlinesthin sample | 7 | 71.4% | 148 min | 0.00% | C+ |
| Frontier Airlinesthin sample | 141 | 67.9% | 71 min | 0.71% | C+ |
| American Airlinesthin sample | 1 | 0.0% | 70 min | 0.00% | F+ |
Flight by flight
Delta flight numbers on ATL to IND
Departure window
When Delta runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 15 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am250 flights93.4%
- 8am–11am380 flights92.2%
- 11am–2pm424 flights85.6%
- 2pm–5pm590 flights83.0%
- 5pm–8pm335 flights78.2%
- 8pm–5am732 flights78.9%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 93.4% of the time, against 78.2% for the evening window. That is 15 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 732 flights scheduled in it.
Across the year
Delta on ATL to IND through the year
December is the weak month at 75.5% on time, against 91.2% in September. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. October was the busiest month here, with 254 flights.
Across the week, Wednesday is the strongest day at 87.7% on time and Thursday the weakest at 81.0%. 7 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Delta runs late on this route
One category carries most of the weight here. Carrier accounts for 47% of the 24,000 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.
- 47%Carrier
- 31%Late-arriving aircraft
- 19%National Airspace System
- 3%Extreme weather
- 0%Security
The largest share of delay minutes, 47%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 11,000 of the 24,000 delay minutes reported here. The split is drawn from 23,684 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 93.4% on time here.
Cancellations sit at 1.48% against a national 1.81%, which is ordinary. Diversions add another 0.15%.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 4.7% 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.
At 432 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 90.8% on time across 2,710 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 2,711 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.
What to do with this
Booking Delta on ATL to IND
Put together: the calendar is the biggest lever here, not the carrier or the hour. September runs 91.2% on time and December 75.5%, a swing of 16 points. If the dates move at all, move them out of December before you think about anything else. 2,667 completed flights over 12 months sit behind that.
Related
Where to go next
- ATL to IND, every carrier
- Delta on IND to ATL, the return leg
- Southwest Airlines on ATL to IND79.5%
- Frontier Airlines on ATL to IND67.9%
- Delta Air Lines network-wide record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Indianapolis International (IND) delay statistics
- The best time of day to fly, according to 7.04 million flight records
- Worst months to fly in the US, ranked by the data
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.