Flight number record
DL 2948
Delta Air Lines · Atlanta to Green Bay
- Route
- ATL → GRB
- Departs
- 21:35
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2948, check with Delta Air Lines.
DL 2948 lands a B, about a point worse than the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by roughly 45 minutes on average. That rests on 364 flights, with a median arrival 4 minutes early.
Key figures
On time
76.4%
Arrivals under 15 minutes late, of 352 completed flights
Avg delay
44 min
Across delayed arrivals only, not all flights
Cancelled
1.92%
National rate is 1.89%
1 hour+ late
5.1%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 4 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 2948 flies
DL 2948 flies ATL to GRB without a single fixed slot. Its most common scheduled departure was 21:35, used on 57 of 364 flights, with 21:20 (50 flights) and 21:40 (46 flights) next.
- Departs 21:3557 flights15.7%
- Departs 21:2050 flights13.7%
- Departs 21:4046 flights12.6%
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 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 2948 runs 6 points better at 76.4%. 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 2948 next to ATL to GRB
Every carrier on ATL to GRB combined arrived on time 76.6% of the time across 366 flights, so DL 2948 is about level with it. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2948thin sample | 364 | 76.4% | 44 min | 1.92% | B |
| All Delta Air Lines on ATL–GRB | 366 | 76.6% | 44 min | 1.91% | B |
| All carriers on ATL–GRB | 366 | 76.6% | 44 min | 1.91% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2948 quarter by quarter
DL 2948 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.0% on time and its weakest Jul–Sep 2026 at 61.3%, a swing of 29 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 flights90.0%
- Oct–Dec 202591 flights80.0%
- Jan–Mar 202690 flights78.3%
- Apr–Jun 202691 flights77.0%
- Jul–Sep 202662 flights61.3%
Scale runs 55% to 95%.
By weekday, DL 2948 did best on Tuesday at 90.4% on time and worst on Sunday at 59.2%. Each day rests on about 52 flights, so a gap of 31 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2948 runs when it is late
The 83 late arrivals split 38 under half an hour, 27 between 30 and 60 minutes, and 18 an hour or more.
- 15+ min early56 flights15.9%
- Within 15 min213 flights60.5%
- 15–29 min late38 flights10.8%
- 30–59 min late27 flights7.7%
- 1–2 hours late15 flights4.3%
- 2+ hours late3 flights0.9%
Scale runs 0% to 100%.
Share of 352 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 70 departures that left 15 minutes late or more, only 2 made it up before arrival. 15 flights left on time and still arrived late.
The worst days
Worst days for DL 2948
The latest arrival of the period was on 18 June 2026, 3 hours 19 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across June, July, November, May and January, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 18 June 2026 | 3 hours 19 minutes | Extreme weather |
| 11 July 2026 | 2 hours 12 minutes | Late-arriving aircraft |
| 8 November 2025 | 2 hours 1 minute | National Airspace System |
| 6 May 2026 | 1 hour 43 minutes | Late-arriving aircraft |
| 5 January 2026 | 1 hour 32 minutes | Carrier |
Delay causes
Why DL 2948 runs late
Carrier accounts for 45% of the 3,608 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Carrier
- 27%Late-arriving aircraft
- 21%National Airspace System
- 7%Extreme weather
The largest share of delay minutes, 45%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,638 of the 3,608 delay minutes reported here. The split is drawn from 3,608 delay minutes reported on DL 2948.
Cancellations sit at 1.92% against a national 1.89%, which is ordinary. Diversions add another 1.37%.
Connections and routes
What a delay on this flight costs
5.1% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last roughly 45 minutes, which a normal layover absorbs.
The 774 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 364 flights under DL 2948 in the data flew ATL to GRB. 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. 364 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 2948
For a booking, read DL 2948 as 76.4% on time with 1.92% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- 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.