Flight number record
DL 1386
Delta Air Lines · Miami to Atlanta
- Route
- MIA → ATL
- Departs
- 18:15
- Flights
- 340
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1386, check with Delta Air Lines.
DL 1386 draws a D. Roughly one flight in two arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 340 flights, with a median arrival 5 minutes late.
The national on-time rate over the same period is 77.3%, so DL 1386 runs 19 points behind the country as a whole. Across a thousand flights that is about 192 extra late arrivals.
Key figures
On time
58.1%
Arrivals under 15 minutes late, of 334 completed flights
Avg delay
78 min
Across delayed arrivals only, not all flights
Cancelled
1.76%
National rate is 1.89%
1 hour+ late
17.4%
National rate is 8.3%
These figures cover 340 flights between September 2025 and August 2026. Beyond the headline rate, 17.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When DL 1386 flies
DL 1386 flies MIA to ATL without a single fixed slot. Its most common scheduled departure was 18:15, used on 60 of 340 flights, with 18:05 (39 flights) and 18:23 (36 flights) next.
- Departs 18:1560 flights17.6%
- Departs 18:0539 flights11.5%
- Departs 18:2336 flights10.6%
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 18:15 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 1386 runs 10 points worse at 58.1%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
DL 1386 next to MIA to ATL
Every carrier on MIA to ATL combined arrived on time 74.2% of the time across 6,271 flights, so DL 1386 is 16 points behind it. Delta flew 3,322 flights on the same city pair under all its flight numbers, including this one, and those ran 77.8% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 23 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1386thin sample | 340 | 58.1% | 78 min | 1.76% | D |
| All Delta Air Lines on MIA–ATL | 3,322 | 77.8% | 82 min | 1.78% | B |
| All carriers on MIA–ATL | 6,271 | 74.2% | 82 min | 1.59% | C |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1386 quarter by quarter
DL 1386 did not run the same all year. Its best quarter was Apr–Jun 2026 at 63.7% on time and its weakest Jul–Sep 2026 at 45.9%, a swing of 18 points on roughly 85 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 202521 flights—
- Oct–Dec 202587 flights58.1%
- Jan–Mar 202679 flights58.7%
- Apr–Jun 202691 flights63.7%
- Jul–Sep 202662 flights45.9%
Scale runs 35% to 70%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1386 did best on Tuesday at 73.5% on time and worst on Sunday at 34.0%. Each day rests on about 49 flights, so a gap of 40 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1386 runs when it is late
The 140 late arrivals split 34 under half an hour, 48 between 30 and 60 minutes, and 58 an hour or more.
- 15+ min early78 flights23.4%
- Within 15 min116 flights34.7%
- 15–29 min late34 flights10.2%
- 30–59 min late48 flights14.4%
- 1–2 hours late36 flights10.8%
- 2+ hours late22 flights6.6%
Scale runs 0% to 100%.
Share of 334 completed flights by arrival against schedule.
31 of 157 late departures made up the time and arrived on time, 20% of them. 14 flights left on time and still arrived late.
The worst days
Worst days for DL 1386
The latest arrival of the period was on 15 March 2026, 6 hours 19 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 March 2026 | 6 hours 19 minutes | Late-arriving aircraft |
| 27 July 2026 | 5 hours 33 minutes | Carrier |
| 25 January 2026 | 5 hours 18 minutes | Carrier |
| 26 July 2026 | 5 hours 6 minutes | Carrier |
| 30 August 2026 | 4 hours 53 minutes | Carrier |
Delay causes
Why DL 1386 runs late
Late-arriving aircraft accounts for 45% of the 11,000 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Late-arriving aircraft
- 33%Carrier
- 19%National Airspace System
- 2%Extreme weather
- 0%Security
45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 11,000 reported delay minutes here, that single category outweighs weather by 24 to one. The split is drawn from 10,874 delay minutes reported on DL 1386.
Cancellations sit at 1.76% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
17.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 594 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
DL 1386 is not only a MIA to ATL flight. It also flew ATL to MIA (337 flights, 63.2% 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. 340 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 MIAthin sample | 337 | 63.2% | 50 min | 1.48% | D |
What to do with this
Booking DL 1386
For a booking, DL 1386 is a flight to put a long connection behind. 17.4% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- MIA to ATL, every carrier and departure
- ATL to MIA, the return direction
- Delta Air Lines 1510 on the same route83.5%
- Delta Air Lines 1332 on the same route73.7%
- Delta Air Lines 1261 on the same route93.1%
- Delta Air Lines 1211 on the same route92.5%
- Delta Air Lines 2836 on the same route87.0%
- Frontier Airlines 4405 on the same route54.8%
- Miami International (MIA) delay statistics
- 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.