Flight number record
DL 3104
Delta Air Lines · Sarasota to Atlanta
- Route
- SRQ → ATL
- Departs
- 12:50
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 3104, check with Delta Air Lines.
DL 3104 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 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 363 flights, with a median arrival 9 minutes early.
Set against the rest of the country, DL 3104's record is 7 points better than the US average of 77.3%. That gap is worth roughly 73 fewer late arrivals for every thousand flights.
Key figures
On time
84.6%
Arrivals under 15 minutes late, of 356 completed flights
Avg delay
88 min
Across delayed arrivals only, not all flights
Cancelled
0.83%
National rate is 1.89%
1 hour+ late
7.6%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 2026. The median arrival is 9 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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Schedule
When DL 3104 flies
DL 3104 flies SRQ to ATL without a single fixed slot. Its most common scheduled departure was 12:50, used on 58 of 363 flights, with 13:32 (40 flights) next.
- Departs 12:5058 flights16.0%
- Departs 13:3240 flights11.0%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 12:50 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 3104 runs 6 points better at 84.6%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 3104 next to SRQ to ATL
Every carrier on SRQ to ATL combined arrived on time 87.8% of the time across 2,289 flights, so DL 3104 is 3 points behind it. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 3104thin sample | 363 | 84.6% | 88 min | 0.83% | B+ |
| All Delta Air Lines on SRQ–ATL | 2,289 | 87.8% | 87 min | 1.70% | A |
| All carriers on SRQ–ATL | 2,289 | 87.8% | 87 min | 1.70% | A |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 3104 quarter by quarter
DL 3104 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jan–Mar 2026 at 72.7%, a swing of 24 points on roughly 73 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights96.7%
- Oct–Dec 202591 flights89.0%
- Jan–Mar 202690 flights72.7%
- Apr–Jun 202691 flights89.9%
- Jul–Sep 202661 flights81.0%
Scale runs 65% to 100%.
By weekday, DL 3104 did best on Wednesday at 90.4% on time and worst on Monday at 77.4%. Each day rests on about 52 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 3104 runs when it is late
DL 3104 often beats the schedule: 119 of 356 completed flights, 33%, arrived 15 minutes or more early. The 55 late arrivals split 16 under half an hour, 12 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early119 flights33.4%
- Within 15 min182 flights51.1%
- 15–29 min late16 flights4.5%
- 30–59 min late12 flights3.4%
- 1–2 hours late22 flights6.2%
- 2+ hours late5 flights1.4%
Scale runs 0% to 100%.
Share of 356 completed flights by arrival against schedule.
10 of 56 late departures made up the time and arrived on time, 18% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for DL 3104
The latest arrival of the period was on 2 May 2026, 18 hours 58 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 2 May 2026 | 18 hours 58 minutes | Carrier |
| 16 March 2026 | 6 hours 18 minutes | Late-arriving aircraft |
| 17 March 2026 | 3 hours 44 minutes | Late-arriving aircraft |
| 14 August 2026 | 3 hours 37 minutes | Extreme weather |
| 28 April 2026 | 2 hours 59 minutes | Late-arriving aircraft |
Delay causes
Why DL 3104 runs late
Late-arriving aircraft accounts for 50% of the 4,818 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Late-arriving aircraft
- 27%Carrier
- 14%National Airspace System
- 8%Extreme weather
50% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,818 reported delay minutes here, that single category outweighs weather by 6 to one. The split is drawn from 4,818 delay minutes reported on DL 3104.
Cancellations are rare at 0.83%, 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 routes
What a delay on this flight costs
7.6% 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 an hour and a half, which a normal layover absorbs.
DL 3104 is not only a SRQ to ATL flight. It also flew ATL to SRQ (363 flights, 85.0% 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. 363 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| ATL to SRQthin sample | 363 | 85.0% | 58 min | 1.10% | A |
What to do with this
Booking DL 3104
For a booking, read DL 3104 as 84.6% on time with 0.83% cancelled over 363 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SRQ to ATL, every carrier and departure
- ATL to SRQ, the return direction
- Delta Air Lines 1499 on the same route94.4%
- Delta Air Lines 1445 on the same route94.1%
- Delta Air Lines 2438 on the same route84.3%
- Delta Air Lines 3115 on the same route79.5%
- Delta Air Lines 3196 on the same route91.1%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.