Flight number record
DL 3097
Delta Air Lines · Atlanta to Valparaiso
- Route
- ATL → VPS
- Departs
- 23:15
- Flights
- 340
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 3097, check with Delta Air Lines.
DL 3097 lands a B, 4 points better than the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 340 flights, with a median arrival 7 minutes early.
Set against the rest of the country, DL 3097's record is 4 points better than the US average of 77.3%. That gap is worth roughly 44 fewer late arrivals for every thousand flights.
Key figures
On time
81.7%
Arrivals under 15 minutes late, of 334 completed flights
Avg delay
76 min
Across delayed arrivals only, not all flights
Cancelled
1.47%
National rate is 1.89%
1 hour+ late
8.1%
National rate is 8.3%
These figures cover 340 flights between September 2025 and August 2026. Beyond the headline rate, 8.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 3097 flies
DL 3097 flies ATL to VPS without a single fixed slot. Its most common scheduled departure was 23:15, used on 61 of 340 flights, with 22:54 (48 flights) and 23:00 (43 flights) next.
- Departs 23:1561 flights17.9%
- Departs 22:5448 flights14.1%
- Departs 23:0043 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 23:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 3097 runs 12 points better at 81.7%. 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 3097 next to ATL to VPS
Every carrier on ATL to VPS combined arrived on time 83.8% of the time across 2,388 flights, so DL 3097 is 2 points behind it. Across its whole network Delta Air Lines managed 81.1%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 3097thin sample | 340 | 81.7% | 76 min | 1.47% | B |
| All Delta Air Lines on ATL–VPS | 2,388 | 83.8% | 62 min | 1.80% | B |
| All carriers on ATL–VPS | 2,388 | 83.8% | 62 min | 1.80% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 3097 quarter by quarter
DL 3097 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 73.3%, a swing of 20 points on roughly 68 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 202567 flights81.8%
- Jan–Mar 202690 flights80.5%
- Apr–Jun 202691 flights84.6%
- Jul–Sep 202662 flights73.3%
Scale runs 65% to 100%.
By weekday, DL 3097 did best on Tuesday at 87.2% on time and worst on Sunday at 73.5%. Each day rests on about 49 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 3097 runs when it is late
The 61 late arrivals split 22 under half an hour, 12 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early68 flights20.4%
- Within 15 min205 flights61.4%
- 15–29 min late22 flights6.6%
- 30–59 min late12 flights3.6%
- 1–2 hours late21 flights6.3%
- 2+ hours late6 flights1.8%
Scale runs 0% to 100%.
Share of 334 completed flights by arrival against schedule.
13 of 66 late departures made up the time and arrived on time, 20% of them. 8 flights left on time and still arrived late.
The worst days
Worst days for DL 3097
The latest arrival of the period was on 24 December 2025, 12 hours 5 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across December, January, June and August, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 December 2025 | 12 hours 5 minutes | Extreme weather |
| 9 January 2026 | 9 hours 43 minutes | National Airspace System |
| 18 June 2026 | 3 hours 6 minutes | Late-arriving aircraft |
| 7 August 2026 | 2 hours 49 minutes | Carrier |
| 14 June 2026 | 2 hours 7 minutes | Late-arriving aircraft |
Delay causes
Why DL 3097 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 4,652 reported delay minutes.
- 37%Carrier
- 23%Late-arriving aircraft
- 21%National Airspace System
- 19%Extreme weather
Extreme weather accounts for 19% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 3.2 times the usual weather exposure. The split is drawn from 4,652 delay minutes reported on DL 3097.
Cancellations sit at 1.47% against a national 1.89%, which is ordinary. Diversions add another 0.29%.
Connections and routes
What a delay on this flight costs
8.1% 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 a little over an hour, which a normal layover absorbs.
Every one of the 340 flights under DL 3097 in the data flew ATL to VPS. 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. 340 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 3097
For a booking, read DL 3097 as 81.7% on time with 1.47% cancelled over 340 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ATL to VPS, every carrier and departure
- VPS to ATL, the return direction
- Delta Air Lines 3051 on the same route90.9%
- Delta Air Lines 2803 on the same route79.8%
- Delta Air Lines 3083 on the same route81.5%
- Delta Air Lines 2832 on the same route80.0%
- 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
- Connecting flights: how much buffer the data says you need
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.