Flight number record
DL 325
Delta Air Lines · Atlanta to Washington
- Route
- ATL → DCA
- Departs
- 18:55
- Flights
- 362
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 325, check with Delta Air Lines.
DL 325 draws a D−. Roughly one flight in two arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 362 flights, with a median arrival 6 minutes late.
The national on-time rate over the same period is 77.3%, so DL 325 runs 19 points behind the country as a whole. Across a thousand flights that is about 190 extra late arrivals.
Key figures
On time
58.3%
Arrivals under 15 minutes late, of 350 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
3.31%
National rate is 1.89%
1 hour+ late
13.4%
National rate is 8.3%
These figures cover 362 flights between September 2025 and August 2026. Beyond the headline rate, 13.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 325 flies
DL 325 flies ATL to DCA without a single fixed slot. Its most common scheduled departure was 18:55, used on 117 of 362 flights, with 18:59 (106 flights) and 18:51 (49 flights) next.
- Departs 18:55117 flights32.3%
- Departs 18:59106 flights29.3%
- Departs 18:5149 flights13.5%
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 18:55 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 325 runs 10 points worse at 58.3%. 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 325 next to ATL to DCA
Every carrier on ATL to DCA combined arrived on time 68.7% of the time across 6,798 flights, so DL 325 is 10 points behind it. Delta flew 3,850 flights on the same city pair under all its flight numbers, including this one, and those ran 66.7% 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 325thin sample | 362 | 58.3% | 61 min | 3.31% | D− |
| All Delta Air Lines on ATL–DCA | 3,850 | 66.7% | 60 min | 2.44% | C |
| All carriers on ATL–DCA | 6,798 | 68.7% | 70 min | 3.43% | C− |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 325 quarter by quarter
DL 325 did not run the same all year. Its best quarter was Jul–Sep 2025 at 70.0% on time and its weakest Jan–Mar 2026 at 48.8%, a swing of 21 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 flights70.0%
- Oct–Dec 202590 flights61.4%
- Jan–Mar 202690 flights48.8%
- Apr–Jun 202691 flights66.3%
- Jul–Sep 202661 flights49.1%
Scale runs 40% to 75%.
By weekday, DL 325 did best on Saturday at 82.4% on time and worst on Friday at 47.9%. Each day rests on about 52 flights, so a gap of 35 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 325 runs when it is late
The 146 late arrivals split 51 under half an hour, 48 between 30 and 60 minutes, and 47 an hour or more.
- 15+ min early43 flights12.3%
- Within 15 min161 flights46.0%
- 15–29 min late51 flights14.6%
- 30–59 min late48 flights13.7%
- 1–2 hours late30 flights8.6%
- 2+ hours late17 flights4.9%
Scale runs 0% to 100%.
Share of 350 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 98 departures that left 15 minutes late or more, only 1 made it up before arrival. In the other direction, 49 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 DCA.
The worst days
Worst days for DL 325
The latest arrival of the period was on 14 June 2026, 6 hours 50 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. 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 |
|---|---|---|
| 14 June 2026 | 6 hours 50 minutes | National Airspace System |
| 7 December 2025 | 4 hours 26 minutes | Extreme weather |
| 17 July 2026 | 4 hours 24 minutes | Carrier |
| 27 July 2026 | 4 hours 16 minutes | Carrier |
| 14 October 2025 | 3 hours 5 minutes | Carrier |
Delay causes
Why DL 325 runs late
National Airspace System accounts for 48% of the 8,909 delay minutes carriers reported here, and the remaining four split what is left.
- 48%National Airspace System
- 33%Carrier
- 12%Late-arriving aircraft
- 7%Extreme weather
48% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 4,298 minutes out of 8,909, against a national NAS share of 21%. The split is drawn from 8,909 delay minutes reported on DL 325.
Cancellations run at 3.31%, against 1.89% nationally. That is about one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
13.4% 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 547 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 362 flights under DL 325 in the data flew ATL to DCA. 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. 362 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 325
For a booking, the cancellation rate is the figure to plan around on DL 325: 3.31% of its 362 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- ATL to DCA, every carrier and departure
- DCA to ATL, the return direction
- Delta Air Lines 360 on the same route69.7%
- Delta Air Lines 537 on the same route67.3%
- Delta Air Lines 380 on the same route80.4%
- Delta Air Lines 926 on the same route84.1%
- Delta Air Lines 727 on the same route53.3%
- Delta Air Lines 950 on the same route63.7%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Ronald Reagan Washington National (DCA) 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
- What a cancellation rate actually tells you (and what it hides)
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.