Flight number record

DL 3015

Delta Air Lines · Knoxville to Atlanta

Route: TYS → ATL
Departs: 05:40
Flights: 343
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 3015, check with Delta Air Lines.

DL 3015 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 15 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 2.2 hours. That rests on 343 flights, with a median arrival 16 minutes early.

Set against the rest of the country, DL 3015's record is 15 points better than the US average of 77.6%. That gap is worth roughly 150 fewer late arrivals for every thousand flights.

On time

92.6%

Arrivals under 15 minutes late, of 337 completed flights

Avg delay

134 min

Across delayed arrivals only, not all flights

Cancelled

1.75%

National rate is 1.81%

1 hour+ late

3.3%

National rate is 8.1%

These figures cover 343 flights between July 2025 and June 2026. The median arrival is 16 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 3015 flies

DL 3015 flies TYS to ATL without a single fixed slot. Its most common scheduled departure was 05:40, used on 165 of 343 flights, with 05:45 (62 flights) and 05:35 (42 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 05:40165 flights48.1%
Departs 05:4562 flights18.1%
Departs 05:3542 flights12.2%

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 05:40 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 3015 runs 3 points better at 92.6%. 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 3015 next to TYS to ATL

Every carrier on TYS to ATL combined arrived on time 87.6% of the time across 1,724 flights, so DL 3015 is 5 points ahead of it. Delta flew 1,723 flights on the same city pair under all its flight numbers, including this one, and those ran 87.6% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 11 points.

DL 3015 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 3015thin sample	343	92.6%	134 min	1.75%	A
All Delta Air Lines on TYS–ATL	1,723	87.6%	78 min	1.86%	A
All carriers on TYS–ATL	1,724	87.6%	78 min	1.86%	A
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 3015 quarter by quarter

DL 3015 did not run the same all year. Its best quarter was Apr–Jun 2026 at 98.9% on time and its weakest Jan–Mar 2026 at 88.8%, a swing of 10 points on roughly 86 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 202592 flights89.0%
Oct–Dec 202577 flights93.3%
Jan–Mar 202683 flights88.8%
Apr–Jun 202691 flights98.9%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 3015 ranged from 89.1% on Saturday to 100.0% on Friday. With about 49 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 3015 runs late

One category carries most of the weight here. Carrier accounts for 56% of the 3,352 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
56%
National Airspace System
29%
Late-arriving aircraft
14%
Extreme weather
1%

The largest share of delay minutes, 56%, 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 1,862 of the 3,352 delay minutes reported here. The split is drawn from 3,352 delay minutes reported on DL 3015.

Cancellations sit at 1.75% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.3% 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.

Every one of the 343 flights under DL 3015 in the data flew TYS to ATL. 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. 343 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 3015

For a booking, read DL 3015 as 92.6% on time with 1.75% cancelled over 343 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