Flight number record

DL 3108

Delta Air Lines · Atlanta to Dayton

Route: ATL → DAY
Departs: 08:55
Flights: 344
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 3108, check with Delta Air Lines.

DL 3108 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 11 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 45 minutes. That rests on 344 flights, with a median arrival 11 minutes early.

Set against the rest of the country, DL 3108's record is 11 points better than the US average of 77.6%. That gap is worth roughly 105 fewer late arrivals for every thousand flights.

On time

88.1%

Arrivals under 15 minutes late, of 337 completed flights

Avg delay

47 min

Across delayed arrivals only, not all flights

Cancelled

1.74%

National rate is 1.81%

1 hour+ late

2.4%

National rate is 8.1%

These figures cover 344 flights between July 2025 and June 2026. The median arrival is 11 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 3108 flies

DL 3108 flies ATL to DAY without a single fixed slot. Its most common scheduled departure was 08:55, used on 142 of 344 flights, with 09:20 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:55142 flights41.3%
Departs 09:2038 flights11.0%

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 08:55 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 3108 runs 4 points better at 88.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 3108 next to ATL to DAY

Every carrier on ATL to DAY combined arrived on time 85.2% of the time across 1,400 flights, so DL 3108 is 3 points ahead of it. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 7 points.

DL 3108 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 3108thin sample	344	88.1%	47 min	1.74%	A
All Delta Air Lines on ATL–DAY	1,400	85.2%	60 min	1.64%	A
All carriers on ATL–DAY	1,400	85.2%	60 min	1.64%	A
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 3108 quarter by quarter

Quarter by quarter DL 3108 held fairly steady: 89.0% in Jul–Sep 2025, 89.6% in Oct–Dec 2025, 83.5% in Jan–Mar 2026 and 90.0% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights89.0%
Oct–Dec 202578 flights89.6%
Jan–Mar 202683 flights83.5%
Apr–Jun 202691 flights90.0%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 3108 ranged from 83.0% on Sunday to 93.2% on Saturday. With about 49 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 3108 runs late

One category carries most of the weight here. Carrier accounts for 66% of the 1,866 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
66%
Late-arriving aircraft
20%
National Airspace System
10%
Extreme weather
5%

The largest share of delay minutes, 66%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,229 of the 1,866 delay minutes reported here. The split is drawn from 1,866 delay minutes reported on DL 3108.

Cancellations sit at 1.74% against a national 1.81%, which is ordinary. Diversions add another 0.29%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 2.4% land an hour or more behind schedule, against 8.1% 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.

DL 3108 is not only a ATL to DAY flight. It also flew DAY to ATL (343 flights, 91.1% 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. 344 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.

Other routes flown as DL 3108
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
DAY to ATLthin sample	343	91.1%	66 min	1.46%	A

What to do with this

Booking DL 3108

For a booking, read DL 3108 as 88.1% on time with 1.74% cancelled over 344 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