Flight number record
DL 3139
Delta Air Lines · Atlanta to Charlotte
- Route
- ATL → CLT
- Departs
- 19:10
- Flights
- 324
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 3139, check with Delta Air Lines.
DL 3139 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 324 flights, with a median arrival 3 minutes early.
The national on-time rate over the same period is 77.3%, so DL 3139 runs 5 points behind the country as a whole. Across a thousand flights that is about 50 extra late arrivals.
Key figures
On time
72.3%
Arrivals under 15 minutes late, of 318 completed flights
Avg delay
56 min
Across delayed arrivals only, not all flights
Cancelled
1.85%
National rate is 1.89%
1 hour+ late
9.4%
National rate is 8.3%
These figures cover 324 flights between September 2025 and August 2026. Beyond the headline rate, 9.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 3139 flies
DL 3139 flies ATL to CLT without a single fixed slot. Its most common scheduled departure was 19:10, used on 65 of 324 flights, with 19:30 (44 flights) and 19:05 (36 flights) next.
- Departs 19:1065 flights20.1%
- Departs 19:3044 flights13.6%
- Departs 19:0536 flights11.1%
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 19:10 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 3139 runs 4 points better at 72.3%. 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 3139 next to ATL to CLT
Every carrier on ATL to CLT combined arrived on time 80.1% of the time across 4,381 flights, so DL 3139 is 8 points behind it. Delta flew 2,587 flights on the same city pair under all its flight numbers, including this one, and those ran 80.5% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 3139thin sample | 324 | 72.3% | 56 min | 1.85% | C |
| All Delta Air Lines on ATL–CLT | 2,587 | 80.5% | 61 min | 1.12% | B |
| All carriers on ATL–CLT | 4,381 | 80.1% | 74 min | 1.89% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 3139 quarter by quarter
DL 3139 did not run the same all year. Its best quarter was Jan–Mar 2026 at 81.0% on time and its weakest Jul–Sep 2026 at 55.6%, a swing of 25 points on roughly 65 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 flights73.3%
- Oct–Dec 202592 flights68.9%
- Jan–Mar 202687 flights81.0%
- Apr–Jun 202678 flights74.4%
- Jul–Sep 202637 flights55.6%
Scale runs 45% to 85%.
By weekday, DL 3139 did best on Wednesday at 85.0% on time and worst on Saturday at 60.6%. Each day rests on about 46 flights, so a gap of 24 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 3139 runs when it is late
The 88 late arrivals split 37 under half an hour, 21 between 30 and 60 minutes, and 30 an hour or more.
- 15+ min early44 flights13.8%
- Within 15 min186 flights58.5%
- 15–29 min late37 flights11.6%
- 30–59 min late21 flights6.6%
- 1–2 hours late19 flights6.0%
- 2+ hours late11 flights3.5%
Scale runs 0% to 100%.
Share of 318 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 76 departures that left 15 minutes late or more, only 7 made it up before arrival. In the other direction, 19 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at CLT.
The worst days
Worst days for DL 3139
The latest arrival of the period was on 4 July 2026, 3 hours 40 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 4 July 2026 | 3 hours 40 minutes | Late-arriving aircraft |
| 7 December 2025 | 3 hours 20 minutes | Late-arriving aircraft |
| 8 June 2026 | 2 hours 42 minutes | Carrier |
| 26 May 2026 | 2 hours 26 minutes | Carrier |
| 27 October 2025 | 2 hours 24 minutes | Carrier |
Delay causes
Why DL 3139 runs late
Carrier accounts for 44% of the 4,937 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Carrier
- 39%Late-arriving aircraft
- 17%National Airspace System
- 1%Extreme weather
39% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,937 reported delay minutes here, that single category outweighs weather by 39 to one. The split is drawn from 4,937 delay minutes reported on DL 3139.
Cancellations sit at 1.85% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
9.4% 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.
Every one of the 324 flights under DL 3139 in the data flew ATL to CLT. 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. 324 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 3139
For a booking, DL 3139 is one of the weaker ways to fly ATL to CLT: 8 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- ATL to CLT, every carrier and departure
- CLT to ATL, the return direction
- Delta Air Lines 3177 on the same route83.7%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Charlotte Douglas International (CLT) 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.