Flight number record

DL 3097

Delta Air Lines · Atlanta to Valparaiso

Route: ATL → VPS
Departs: 23:15
Flights: 340
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 77.6%. 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 is a workable record, not a spotless one. 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 77.6%. That gap is worth roughly 41 fewer late arrivals for every thousand flights.

On time

81.7%

Arrivals under 15 minutes late, of 334 completed flights

Avg delay

72 min

Across delayed arrivals only, not all flights

Cancelled

1.47%

National rate is 1.81%

1 hour+ late

6.6%

National rate is 8.1%

These figures cover 340 flights between July 2025 and June 2026. The median arrival is 7 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.

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 62 of 340 flights, with 22:54 (48 flights) and 23:00 (43 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 23:1562 flights18.2%
Departs 22:5448 flights14.1%
Departs 23:0043 flights12.6%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

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 70.5%, and DL 3097 runs 11 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.

Against the route

DL 3097 next to ATL to VPS

Every carrier on ATL to VPS combined arrived on time 84.7% of the time across 2,387 flights, so DL 3097 is 3 points behind it. Across its whole network Delta Air Lines managed 81.6%, close to this flight's figure.

DL 3097 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 3097thin sample	340	81.7%	72 min	1.47%	B
All Delta Air Lines on ATL–VPS	2,387	84.7%	63 min	1.59%	B
All carriers on ATL–VPS	2,387	84.7%	63 min	1.59%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 3097 quarter by quarter

Quarter by quarter DL 3097 held fairly steady: 80.0% in Jul–Sep 2025, 81.8% in Oct–Dec 2025, 80.5% in Jan–Mar 2026 and 84.6% in Apr–Jun 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights80.0%
Oct–Dec 202567 flights81.8%
Jan–Mar 202690 flights80.5%
Apr–Jun 202691 flights84.6%

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 3097 did best on Tuesday at 89.6% on time and worst on Sunday at 76.0%. Each day rests on about 49 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

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 4,396 reported delay minutes.

Carrier
32%
Late-arriving aircraft
24%
National Airspace System
23%
Extreme weather
21%

Extreme weather accounts for 21% 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 3.4 times the usual weather exposure. The split is drawn from 4,396 delay minutes reported on DL 3097.

Cancellations sit at 1.47% against a national 1.81%, which is ordinary. Diversions add another 0.29%.

Connections and routes

What a delay on this flight costs

6.6% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures