Flight number record

DL 3134

Delta Air Lines · Atlanta to Indianapolis

Route: ATL → IND
Departs: 14:10
Flights: 356
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 3134, check with Delta Air Lines.

DL 3134 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 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 356 flights, with a median arrival 6 minutes early.

Set against the rest of the country, DL 3134's record is 7 points better than the US average of 77.6%. That gap is worth roughly 65 fewer late arrivals for every thousand flights.

On time

84.1%

Arrivals under 15 minutes late, of 353 completed flights

Avg delay

52 min

Across delayed arrivals only, not all flights

Cancelled

0.84%

National rate is 1.81%

1 hour+ late

4.2%

National rate is 8.1%

These figures cover 356 flights between July 2025 and June 2026. The median arrival is 6 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 DL 3134 flies

DL 3134 flies ATL to IND without a single fixed slot. Its most common scheduled departure was 14:10, used on 58 of 356 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 14:1058 flights16.3%

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 14:10 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 3134 runs 12 points better at 84.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 3134 next to ATL to IND

Every carrier on ATL to IND combined arrived on time 82.7% of the time across 3,190 flights, so DL 3134 is about level with it. Delta flew 2,711 flights on the same city pair under all its flight numbers, including this one, and those ran 84.0% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 3 points.

DL 3134 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 3134thin sample	356	84.1%	52 min	0.84%	B+
All Delta Air Lines on ATL–IND	2,711	84.0%	55 min	1.48%	B
All carriers on ATL–IND	3,190	82.7%	57 min	1.35%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 3134 quarter by quarter

Quarter by quarter DL 3134 held fairly steady: 87.9% in Jul–Sep 2025, 87.5% in Oct–Dec 2025, 81.9% in Jan–Mar 2026 and 79.1% 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 flights87.9%
Oct–Dec 202588 flights87.5%
Jan–Mar 202685 flights81.9%
Apr–Jun 202691 flights79.1%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 3134 ranged from 78.4% on Thursday to 88.0% on Sunday. With about 51 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 3134 runs late

One category carries most of the weight here. Carrier accounts for 50% of the 2,904 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
50%
Late-arriving aircraft
27%
National Airspace System
14%
Extreme weather
9%

The largest share of delay minutes, 50%, 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 1,456 of the 2,904 delay minutes reported here. The split is drawn from 2,904 delay minutes reported on DL 3134.

Cancellations are rare at 0.84%, 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.

DL 3134 is not only a ATL to IND flight. It also flew IND to ATL (335 flights, 87.2% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 356 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.

Other routes flown as DL 3134
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
IND to ATLthin sample	335	87.2%	88 min	0.60%	A+

What to do with this

Booking DL 3134

For a booking, read DL 3134 as 84.1% on time with 0.84% cancelled over 356 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

A flight number here means Delta Air Lines’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