Flight number record
DL 3131
Delta Air Lines · Atlanta to Panama City
- Route
- ATL → ECP
- Departs
- 23:00
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 3131, check with Delta Air Lines.
DL 3131 lands a B, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 365 flights, with a median arrival 8 minutes early.
Set against the rest of the country, DL 3131's record is 6 points better than the US average of 77.3%. That gap is worth roughly 61 fewer late arrivals for every thousand flights.
Key figures
On time
83.4%
Arrivals under 15 minutes late, of 356 completed flights
Avg delay
86 min
Across delayed arrivals only, not all flights
Cancelled
1.10%
National rate is 1.89%
1 hour+ late
4.8%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 8 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 3131 flies
DL 3131 flies ATL to ECP without a single fixed slot. Its most common scheduled departure was 23:00, used on 94 of 365 flights, with 23:05 (56 flights) and 22:35 (39 flights) next.
- Departs 23:0094 flights25.8%
- Departs 23:0556 flights15.3%
- Departs 22:3539 flights10.7%
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 23:00 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 3131 runs 13 points better at 83.4%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 3131 next to ATL to ECP
Every carrier on ATL to ECP combined arrived on time 83.2% of the time across 2,421 flights, so DL 3131 is about level with it. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 3131 | 365 | 83.4% | 86 min | 1.10% | B |
| All Delta Air Lines on ATL–ECP | 2,421 | 83.2% | 61 min | 1.94% | B |
| All carriers on ATL–ECP | 2,421 | 83.2% | 61 min | 1.94% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 3131 quarter by quarter
DL 3131 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jul–Sep 2026 at 70.0%, a swing of 23 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 flights93.3%
- Oct–Dec 202592 flights85.4%
- Jan–Mar 202690 flights85.2%
- Apr–Jun 202691 flights85.4%
- Jul–Sep 202662 flights70.0%
Scale runs 60% to 100%.
By weekday, DL 3131 did best on Thursday at 92.2% on time and worst on Sunday at 76.5%. Each day rests on about 52 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 3131 runs when it is late
DL 3131 often beats the schedule: 89 of 356 completed flights, 25%, arrived 15 minutes or more early. The 59 late arrivals split 20 under half an hour, 22 between 30 and 60 minutes, and 17 an hour or more.
- 15+ min early89 flights25.0%
- Within 15 min208 flights58.4%
- 15–29 min late20 flights5.6%
- 30–59 min late22 flights6.2%
- 1–2 hours late10 flights2.8%
- 2+ hours late7 flights2.0%
Scale runs 0% to 100%.
Share of 356 completed flights by arrival against schedule.
11 of 62 late departures made up the time and arrived on time, 18% of them. 8 flights left on time and still arrived late.
The worst days
Worst days for DL 3131
The latest arrival of the period was on 23 December 2025, 12 hours 32 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 23 December 2025 | 12 hours 32 minutes | Carrier |
| 24 December 2025 | 9 hours 47 minutes | National Airspace System |
| 27 April 2026 | 9 hours 11 minutes | Carrier |
| 29 November 2025 | 8 hours 5 minutes | Carrier |
| 21 September 2025 | 2 hours 49 minutes | Late-arriving aircraft |
Delay causes
Why DL 3131 runs late
Carrier accounts for 58% of the 5,079 delay minutes carriers reported here, and the remaining four split what is left.
- 58%Carrier
- 20%National Airspace System
- 18%Late-arriving aircraft
- 4%Extreme weather
The largest share of delay minutes, 58%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,924 of the 5,079 delay minutes reported here. The split is drawn from 5,079 delay minutes reported on DL 3131.
Cancellations sit at 1.10% against a national 1.89%, which is ordinary. Diversions add another 1.37%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.8% land an hour or more behind schedule, against 8.3% 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.
Every one of the 365 flights under DL 3131 in the data flew ATL to ECP. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 365 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 DL 3131
For a booking, read DL 3131 as 83.4% on time with 1.10% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ATL to ECP, every carrier and departure
- ECP to ATL, the return direction
- Delta Air Lines 3048 on the same route91.6%
- Delta Air Lines 1359 on the same route84.4%
- Delta Air Lines 3094 on the same route78.1%
- Delta Air Lines 2494 on the same route81.7%
- Delta Air Lines 3045 on the same route88.1%
- 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
- Worst months to fly in the US, ranked by the data
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.