Flight number record
DL 1011
Delta Air Lines · Atlanta to Hartford
- Route
- ATL → BDL
- Departs
- 21:35
- Flights
- 361
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1011, check with Delta Air Lines.
DL 1011 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 361 flights, with a median arrival right on schedule.
Key figures
On time
73.7%
Arrivals under 15 minutes late, of 353 completed flights
Avg delay
60 min
Across delayed arrivals only, not all flights
Cancelled
2.22%
National rate is 1.89%
1 hour+ late
9.3%
National rate is 8.3%
These figures cover 361 flights between September 2025 and August 2026. Beyond the headline rate, 9.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 1011 flies
DL 1011 flies ATL to BDL without a single fixed slot. Its most common scheduled departure was 21:35, used on 80 of 361 flights, with 21:44 (44 flights) and 21:39 (38 flights) next.
- Departs 21:3580 flights22.2%
- Departs 21:4444 flights12.2%
- Departs 21:3938 flights10.5%
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 21:35 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 1011 runs 4 points better at 73.7%. 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 1011 next to ATL to BDL
Every carrier on ATL to BDL combined arrived on time 79.6% of the time across 2,310 flights, so DL 1011 is 6 points behind it. Delta flew 2,218 flights on the same city pair under all its flight numbers, including this one, and those ran 79.7% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1011thin sample | 361 | 73.7% | 60 min | 2.22% | C |
| All Delta Air Lines on ATL–BDL | 2,218 | 79.7% | 57 min | 1.98% | B |
| All carriers on ATL–BDL | 2,310 | 79.6% | 58 min | 1.99% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1011 quarter by quarter
DL 1011 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 62.3%, a swing of 31 points on roughly 72 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 202589 flights69.0%
- Jan–Mar 202690 flights77.9%
- Apr–Jun 202690 flights75.3%
- Jul–Sep 202662 flights62.3%
Scale runs 55% to 100%.
By weekday, DL 1011 did best on Wednesday at 88.5% on time and worst on Monday at 64.0%. Each day rests on about 52 flights, so a gap of 25 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1011 runs when it is late
The 93 late arrivals split 35 under half an hour, 25 between 30 and 60 minutes, and 33 an hour or more.
- 15+ min early49 flights13.9%
- Within 15 min211 flights59.8%
- 15–29 min late35 flights9.9%
- 30–59 min late25 flights7.1%
- 1–2 hours late22 flights6.2%
- 2+ hours late11 flights3.1%
Scale runs 0% to 100%.
Share of 353 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 8 made it up before arrival. In the other direction, 25 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 BDL.
The worst days
Worst days for DL 1011
The latest arrival of the period was on 7 December 2025, 4 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 |
|---|---|---|
| 7 December 2025 | 4 hours 40 minutes | Late-arriving aircraft |
| 4 July 2026 | 3 hours 26 minutes | Late-arriving aircraft |
| 20 May 2026 | 3 hours 19 minutes | Carrier |
| 16 July 2026 | 3 hours 2 minutes | Carrier |
| 11 August 2026 | 3 hours 2 minutes | Carrier |
Delay causes
Why DL 1011 runs late
Carrier accounts for 53% of the 5,552 delay minutes carriers reported here, and the remaining four split what is left.
- 53%Carrier
- 25%Late-arriving aircraft
- 18%National Airspace System
- 4%Extreme weather
The largest share of delay minutes, 53%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,919 of the 5,552 delay minutes reported here. The split is drawn from 5,552 delay minutes reported on DL 1011.
Cancellations sit at 2.22% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
9.3% 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 859 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.
Every one of the 361 flights under DL 1011 in the data flew ATL to BDL. 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. 361 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 1011
For a booking, DL 1011 is one of the weaker ways to fly ATL to BDL: 6 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 BDL, every carrier and departure
- BDL to ATL, the return direction
- Delta Air Lines 2951 on the same route90.4%
- Delta Air Lines 1082 on the same route88.3%
- Delta Air Lines 2735 on the same route74.7%
- Delta Air Lines 2765 on the same route74.0%
- Delta Air Lines 2739 on the same route83.7%
- 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
- How often a connection fails at the major US hubs
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.