Flight number record

DL 1743

Delta Air Lines · Atlanta to Knoxville

Route: ATL → TYS
Departs: 10:10
Flights: 283
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1743, check with Delta Air Lines.

DL 1743 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 55 minutes. That rests on 283 flights, with a median arrival 9 minutes early.

Set against the rest of the country, DL 1743's record is 11 points better than the US average of 77.6%. That gap is worth roughly 109 fewer late arrivals for every thousand flights.

On time

88.5%

Arrivals under 15 minutes late, of 279 completed flights

Avg delay

54 min

Across delayed arrivals only, not all flights

Cancelled

1.41%

National rate is 1.81%

1 hour+ late

2.2%

National rate is 8.1%

These figures cover 283 flights between July 2025 and June 2026. The median arrival is 9 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 1743 flies

DL 1743 flies ATL to TYS without a single fixed slot. Its most common scheduled departure was 10:10, used on 89 of 283 flights, with 10:05 (32 flights) and 10:15 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:1089 flights31.4%
Departs 10:0532 flights11.3%
Departs 10:1531 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 10:10 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 1743 runs 4 points better at 88.5%. 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 1743 next to ATL to TYS

Every carrier on ATL to TYS combined arrived on time 82.8% of the time across 1,722 flights, so DL 1743 is 6 points ahead of it. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 7 points.

DL 1743 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1743thin sample	283	88.5%	54 min	1.41%	A
All Delta Air Lines on ATL–TYS	1,722	82.8%	58 min	1.86%	B
All carriers on ATL–TYS	1,722	82.8%	58 min	1.86%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1743 quarter by quarter

Quarter by quarter DL 1743 held fairly steady: 86.8% in Jul–Sep 2025, 90.1% in Jan–Mar 2026 and 91.2% in Apr–Jun 2026. A spread of 4 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights86.8%
Oct–Dec 202527 flights—
Jan–Mar 202683 flights90.1%
Apr–Jun 202681 flights91.2%

Scale runs 80% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1743 ranged from 82.9% on Friday to 92.9% on Wednesday. With about 40 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 1743 runs late

One category carries most of the weight here. Carrier accounts for 48% of the 1,711 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
48%
Late-arriving aircraft
36%
National Airspace System
10%
Extreme weather
7%

36% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 1,711 reported delay minutes here, that single category outweighs weather by 5 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 1,711 delay minutes reported on DL 1743.

Cancellations sit at 1.41% 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 2.2% 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 1743 is not only a ATL to TYS flight. It also flew TYS to ATL (283 flights, 91.0% 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. 283 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 1743
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
TYS to ATLthin sample	283	91.0%	52 min	1.41%	A

What to do with this

Booking DL 1743

For a booking, DL 1743 has one of the better records a US domestic flight can show: 88.5% on time and 1.41% cancelled. That is a base rate, not a promise about any single 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