Flight number record

DL 3115

Delta Air Lines · Atlanta to Sarasota

Route: ATL → SRQ
Departs: 14:46
Flights: 329
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 3115, check with Delta Air Lines.

DL 3115 lands a B, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by roughly 50 minutes on average. That is a workable record, not a spotless one. That rests on 329 flights, with a median arrival 3 minutes early.

Set against the rest of the country, DL 3115's record is 5 points better than the US average of 77.6%. That gap is worth roughly 48 fewer late arrivals for every thousand flights.

On time

82.4%

Arrivals under 15 minutes late, of 324 completed flights

Avg delay

48 min

Across delayed arrivals only, not all flights

Cancelled

1.52%

National rate is 1.81%

1 hour+ late

4.0%

National rate is 8.1%

These figures cover 329 flights between July 2025 and June 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.

Schedule

When DL 3115 flies

DL 3115 flies ATL to SRQ without a single fixed slot. Its most common scheduled departure was 14:46, used on 40 of 329 flights, with 15:20 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 14:4640 flights12.2%
Departs 15:2035 flights10.6%

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 14:46 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 3115 runs 10 points better at 82.4%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 3115 next to ATL to SRQ

Every carrier on ATL to SRQ combined arrived on time 81.6% of the time across 2,285 flights, so DL 3115 is about level with it. Across its whole network Delta Air Lines managed 81.6%, close to this flight's figure.

DL 3115 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 3115thin sample	329	82.4%	48 min	1.52%	B
All Delta Air Lines on ATL–SRQ	2,285	81.6%	57 min	1.66%	B
All carriers on ATL–SRQ	2,285	81.6%	57 min	1.66%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 3115 quarter by quarter

Quarter by quarter DL 3115 held fairly steady: 78.3% in Jul–Sep 2025, 85.4% in Oct–Dec 2025, 80.5% in Jan–Mar 2026 and 84.1% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202561 flights78.3%
Oct–Dec 202590 flights85.4%
Jan–Mar 202690 flights80.5%
Apr–Jun 202688 flights84.1%

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 3115 did best on Wednesday at 95.5% on time and worst on Sunday at 73.5%. Each day rests on about 47 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 3115 runs late

One category carries most of the weight here. Carrier accounts for 51% of the 2,747 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
51%
National Airspace System
23%
Late-arriving aircraft
19%
Extreme weather
5%
Security
3%

The largest share of delay minutes, 51%, 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 1,396 of the 2,747 delay minutes reported here. The split is drawn from 2,747 delay minutes reported on DL 3115.

Cancellations sit at 1.52% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.0% 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 3115 is not only a ATL to SRQ flight. It also flew SRQ to ATL (279 flights, 81.7% 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. 329 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 3115
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SRQ to ATLthin sample	279	81.7%	51 min	1.79%	B

What to do with this

Booking DL 3115

For a booking, read DL 3115 as 82.4% on time with 1.52% cancelled over 329 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