Carrier route record

DLLAX→IND

Delta Air Lines · Los Angeles to Indianapolis

Flights: 335
Period: July 2025 to June 2026
Share of route: 39%
Carriers: 5

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Delta Air Lines.

Delta on LAX to IND 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 15 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 335 flights, with a median arrival 11 minutes early.

Set against the rest of the country, Delta's LAX to IND record is 15 points better than the US average of 77.6%. That gap is worth roughly 146 fewer late arrivals for every thousand flights.

On time

92.2%

Arrivals under 15 minutes late, of 332 completed flights

Avg delay

57 min

Across delayed arrivals only, not all flights

Cancelled

0.30%

National rate is 1.81%

Whole route

81.1%

Every carrier on LAX to IND, 855 flights

These figures cover 335 flights between July 2025 and June 2026. The median arrival is 11 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 LAX to IND

Delta flew 335 of the 855 flights on LAX to IND, about 39% of it. Its 92.2% on time is 11 points better than the route as a whole, which runs 81.1%. Ranked by on-time rate it is first of five carriers on the route, where the range runs from Delta at 92.2% to Southwest at 50.0%. Three 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.

On-time performance by carrier on LAX to IND
Airline	Flights	On time	Avg delay	Cancelled	Grade
Delta Air Lines (this page)thin sample	335	92.2%	57 min	0.30%	A+
Spirit Airlinesthin sample	34	85.3%	143 min	0.00%	A+
American Airlines	466	74.0%	101 min	0.64%	C+
Allegiant Airthin sample	12	58.3%	132 min	0.00%	D+
Southwest Airlinesthin sample	8	50.0%	77 min	0.00%	F+

Flight by flight

Delta flight numbers on LAX to IND

DL 90909:0091.6% · 252 flights

Departure window

When Delta runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 335 flights.

5am–8am—
8am–11am299 flights91.6%
11am–2pm2 flights—
2pm–5pm—
5pm–8pm—
8pm–5am34 flights97.1%

Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.

The 8pm–5am window is the strongest at 97.1% on time. The full set of windows spans 6 points.

Across the year

Delta on LAX to IND through the year

Jul–Sep 202582 flights93.9%
Oct–Dec 202577 flights92.0%
Jan–Mar 202688 flights90.8%
Apr–Jun 202688 flights92.0%

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

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 92.2% on time across 335 flights.

Quarter by quarter Delta on LAX to IND held fairly steady: 93.9% in Jul–Sep 2025, 92.0% in Oct–Dec 2025, 90.8% in Jan–Mar 2026 and 92.0% in Apr–Jun 2026. A spread of 3 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Across the week, Sunday is the strongest day at 94.1% on time and Monday the weakest at 86.3%. 8 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 58% of the 1,476 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
58%
Late-arriving aircraft
23%
National Airspace System
19%

The largest share of delay minutes, 58%, 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 854 of the 1,476 delay minutes reported here. The split is drawn from 1,476 reported delay minutes.

Cancellations are rare at 0.30%, 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 stage length

What a delay here costs

Badly late arrivals are rare here: only 2.1% 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 1,814 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

The return leg is a different operation and performs like one: it runs 86.3% on time across 336 flights, 6 points below 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 6 points of difference.

One caution: this is a thin sample. 335 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 Delta on LAX to IND

Put together: treat all of this as provisional. 335 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 92.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 332 completed flights over 12 months sit behind that.

Where to go next

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