Flight number record
DL 2951
Delta Air Lines · Atlanta to Hartford
- Route
- ATL → BDL
- Departs
- 08:10
- Flights
- 357
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2951, check with Delta Air Lines.
DL 2951 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 50 minutes. That rests on 357 flights, with a median arrival 8 minutes early.
Set against the rest of the country, DL 2951's record is 13 points better than the US average of 77.3%. That gap is worth roughly 131 fewer late arrivals for every thousand flights.
Key figures
On time
90.4%
Arrivals under 15 minutes late, of 354 completed flights
Avg delay
50 min
Across delayed arrivals only, not all flights
Cancelled
0.84%
National rate is 1.89%
1 hour+ late
2.5%
National rate is 8.3%
These figures cover 357 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 2951 flies
DL 2951 flies ATL to BDL without a single fixed slot. Its most common scheduled departure was 08:10, used on 61 of 357 flights, with 08:30 (36 flights) next.
- Departs 08:1061 flights17.1%
- Departs 08:3036 flights10.1%
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 08:10 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 2951 runs 7 points better at 90.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 2951 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 2951 is 11 points ahead of 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 beats by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2951thin sample | 357 | 90.4% | 50 min | 0.84% | A+ |
| 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 2951 quarter by quarter
DL 2951 did not run the same all year. Its best quarter was Apr–Jun 2026 at 96.7% on time and its weakest Jan–Mar 2026 at 84.9%, a swing of 12 points on roughly 89 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 202526 flights—
- Oct–Dec 202589 flights85.4%
- Jan–Mar 202689 flights84.9%
- Apr–Jun 202691 flights96.7%
- Jul–Sep 202662 flights91.9%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, DL 2951 did best on Wednesday at 94.2% on time and worst on Monday at 78.4%. Each day rests on about 51 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2951 runs when it is late
The 34 late arrivals split 10 under half an hour, 15 between 30 and 60 minutes, and 9 an hour or more.
- 15+ min early80 flights22.6%
- Within 15 min240 flights67.8%
- 15–29 min late10 flights2.8%
- 30–59 min late15 flights4.2%
- 1–2 hours late8 flights2.3%
- 2+ hours late1 flights0.3%
Scale runs 0% to 100%.
Share of 354 completed flights by arrival against schedule.
6 of 33 late departures made up the time and arrived on time, 18% of them. Only 7 left on time and still arrived late.
The worst days
Worst days for DL 2951
The latest arrival of the period was on 19 July 2026, 3 hours 53 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 |
|---|---|---|
| 19 July 2026 | 3 hours 53 minutes | Carrier |
| 16 March 2026 | 1 hour 57 minutes | Carrier |
| 28 April 2026 | 1 hour 46 minutes | National Airspace System |
| 7 December 2025 | 1 hour 25 minutes | National Airspace System |
| 8 December 2025 | 1 hour 14 minutes | Carrier |
Delay causes
Why DL 2951 runs late
Carrier accounts for 68% of the 1,694 delay minutes carriers reported here, and the remaining four split what is left.
- 68%Carrier
- 21%National Airspace System
- 8%Late-arriving aircraft
- 3%Extreme weather
The largest share of delay minutes, 68%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,153 of the 1,694 delay minutes reported here. The split is drawn from 1,694 delay minutes reported on DL 2951.
Cancellations are rare at 0.84%, 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
Badly late arrivals are rare here: only 2.5% 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.
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.
DL 2951 is not only a ATL to BDL flight. It also flew BDL to ATL (357 flights, 81.8% 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. 357 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 |
|---|---|---|---|---|---|
| BDL to ATLthin sample | 357 | 81.8% | 49 min | 0.84% | B+ |
What to do with this
Booking DL 2951
For a booking, DL 2951 has one of the better records a US domestic flight can show: 90.4% on time and 0.84% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- ATL to BDL, every carrier and departure
- BDL to ATL, the return direction
- Delta Air Lines 1011 on the same route73.7%
- 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
- 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.