Flight number record
DL 1743
Delta Air Lines · Knoxville to Atlanta
- Route
- TYS → ATL
- Departs
- 12:03
- Flights
- 274
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1743, check with Delta Air Lines.
DL 1743 earns an A. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 274 flights, with a median arrival 19 minutes early.
Set against the rest of the country, DL 1743's record is 16 points better than the US average of 77.3%. That gap is worth roughly 164 fewer late arrivals for every thousand flights.
Key figures
On time
93.7%
Arrivals under 15 minutes late, of 271 completed flights
Avg delay
59 min
Across delayed arrivals only, not all flights
Cancelled
1.09%
National rate is 1.89%
1 hour+ late
2.2%
National rate is 8.3%
These figures cover 274 flights between September 2025 and August 2026. The median arrival is 19 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.
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Schedule
When DL 1743 flies
DL 1743 flies TYS to ATL without a single fixed slot. Its most common scheduled departure was 12:03, used on 55 of 274 flights, with 12:01 (41 flights) next.
- Departs 12:0355 flights20.1%
- Departs 12:0141 flights15.0%
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 12:03 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 1743 runs 15 points better at 93.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 1743 next to TYS to ATL
Every carrier on TYS to ATL combined arrived on time 87.8% of the time across 1,728 flights, so DL 1743 is 6 points ahead of it. Delta flew 1,727 flights on the same city pair under all its flight numbers, including this one, and those ran 87.9% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1743thin sample | 274 | 93.7% | 59 min | 1.09% | A |
| All Delta Air Lines on TYS–ATL | 1,727 | 87.9% | 82 min | 1.80% | A |
| All carriers on TYS–ATL | 1,728 | 87.8% | 81 min | 1.79% | A |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1743 quarter by quarter
Quarter by quarter DL 1743 held fairly steady: 100.0% in Jul–Sep 2025, 90.1% in Jan–Mar 2026, 96.2% in Apr–Jun 2026 and 96.2% in Jul–Sep 2026. A spread of 10 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights100.0%
- Oct–Dec 202527 flights—
- Jan–Mar 202683 flights90.1%
- Apr–Jun 202681 flights96.2%
- Jul–Sep 202653 flights96.2%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1743 ranged from 90.2% on Sunday to 100.0% on Wednesday. With about 39 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.
Arrival by arrival
How late DL 1743 runs when it is late
DL 1743 often beats the schedule: 184 of 271 completed flights, 68%, arrived 15 minutes or more early. The 17 late arrivals split 7 under half an hour, 4 between 30 and 60 minutes, and 6 an hour or more.
- 15+ min early184 flights67.9%
- Within 15 min70 flights25.8%
- 15–29 min late7 flights2.6%
- 30–59 min late4 flights1.5%
- 1–2 hours late4 flights1.5%
- 2+ hours late2 flights0.7%
Scale runs 0% to 100%.
Share of 271 completed flights by arrival against schedule.
4 of 20 late departures made up the time and arrived on time, 20% of them. Only 1 left on time and still arrived late.
The worst days
Worst days for DL 1743
The latest arrival of the period was on 4 August 2026, 3 hours 24 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On four of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 4 August 2026 | 3 hours 24 minutes | National Airspace System |
| 30 April 2026 | 2 hours 21 minutes | Late-arriving aircraft |
| 7 March 2026 | 1 hour 40 minutes | Late-arriving aircraft |
| 28 April 2026 | 1 hour 32 minutes | Late-arriving aircraft |
| 6 July 2026 | 1 hour 32 minutes | Late-arriving aircraft |
Delay causes
Why DL 1743 runs late
Late-arriving aircraft accounts for 74% of the 1,010 delay minutes carriers reported here, and the remaining four split what is left.
- 74%Late-arriving aircraft
- 24%National Airspace System
- 2%Carrier
74% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 1,010 reported delay minutes here, that single category outweighs weather by 74 to one. The split is drawn from 1,010 delay minutes reported on DL 1743.
Cancellations sit at 1.09% against a national 1.89%, 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 8.3% 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 TYS to ATL flight. It also flew ATL to TYS (274 flights, 91.9% 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. 274 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| ATL to TYSthin sample | 274 | 91.9% | 52 min | 1.09% | 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: 93.7% on time and 1.09% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- TYS to ATL, every carrier and departure
- ATL to TYS, the return direction
- Delta Air Lines 3015 on the same route94.7%
- 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
- Why the first flight of the morning is statistically safest
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.