Flight number record
DL 1720
Delta Air Lines · Atlanta to Tampa
- Route
- ATL → TPA
- Departs
- 13:25
- Flights
- 357
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1720, check with Delta Air Lines.
DL 1720 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 357 flights, with a median arrival 2 minutes early.
The national on-time rate over the same period is 77.3%, so DL 1720 runs 7 points behind the country as a whole. Across a thousand flights that is about 68 extra late arrivals.
Key figures
On time
70.5%
Arrivals under 15 minutes late, of 353 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
1.12%
National rate is 1.89%
1 hour+ late
10.8%
National rate is 8.3%
These figures cover 357 flights between September 2025 and August 2026. Beyond the headline rate, 10.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 1720 flies
DL 1720 flies ATL to TPA without a single fixed slot. Its most common scheduled departure was 13:25, used on 116 of 357 flights, with 19:59 (56 flights) and 14:33 (39 flights) next.
- Departs 13:25116 flights32.5%
- Departs 19:5956 flights15.7%
- Departs 14:3339 flights10.9%
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 13:25 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 1720 runs 8 points worse at 70.5%. 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 1720 next to ATL to TPA
Every carrier on ATL to TPA combined arrived on time 73.0% of the time across 6,204 flights, so DL 1720 is 3 points behind it. Delta flew 4,452 flights on the same city pair under all its flight numbers, including this one, and those ran 74.3% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1720thin sample | 357 | 70.5% | 61 min | 1.12% | C |
| All Delta Air Lines on ATL–TPA | 4,452 | 74.3% | 59 min | 1.33% | C |
| All carriers on ATL–TPA | 6,204 | 73.0% | 64 min | 1.34% | C |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1720 quarter by quarter
DL 1720 did not run the same all year. Its best quarter was Jan–Mar 2026 at 86.0% on time and its weakest Jul–Sep 2026 at 32.3%, a swing of 54 points on roughly 89 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 202529 flights—
- Oct–Dec 202587 flights72.1%
- Jan–Mar 202689 flights86.0%
- Apr–Jun 202690 flights76.7%
- Jul–Sep 202662 flights32.3%
Scale runs 25% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1720 did best on Wednesday at 80.0% on time and worst on Sunday at 59.2%. Each day rests on about 51 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1720 runs when it is late
The 104 late arrivals split 34 under half an hour, 32 between 30 and 60 minutes, and 38 an hour or more.
- 15+ min early28 flights7.9%
- Within 15 min221 flights62.6%
- 15–29 min late34 flights9.6%
- 30–59 min late32 flights9.1%
- 1–2 hours late26 flights7.4%
- 2+ hours late12 flights3.4%
Scale runs 0% to 100%.
Share of 353 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 103 departures that left 15 minutes late or more, only 10 made it up before arrival. 11 flights left on time and still arrived late.
The worst days
Worst days for DL 1720
The latest arrival of the period was on 2 May 2026, 3 hours 49 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across May, August, June and July, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 2 May 2026 | 3 hours 49 minutes | National Airspace System |
| 8 August 2026 | 3 hours 18 minutes | Carrier |
| 14 June 2026 | 2 hours 58 minutes | National Airspace System |
| 18 June 2026 | 2 hours 47 minutes | Extreme weather |
| 30 July 2026 | 2 hours 46 minutes | Late-arriving aircraft |
Delay causes
Why DL 1720 runs late
Carrier accounts for 50% of the 6,374 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Carrier
- 29%Late-arriving aircraft
- 17%National Airspace System
- 5%Extreme weather
The largest share of delay minutes, 50%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,163 of the 6,374 delay minutes reported here. The split is drawn from 6,374 delay minutes reported on DL 1720.
Cancellations sit at 1.12% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
10.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The same number turns up on one other city pair in the data, including TPA to ATL (241), but none flew often enough under DL 1720 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to TPA only.
One caution: this is a thin sample. 357 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 1720
For a booking, read DL 1720 as 70.5% on time with 1.12% cancelled over 357 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ATL to TPA, every carrier and departure
- TPA to ATL, the return direction
- Delta Air Lines 1227 on the same route90.8%
- Delta Air Lines 1587 on the same route79.8%
- Delta Air Lines 1099 on the same route83.7%
- Delta Air Lines 759 on the same route68.5%
- Delta Air Lines 1457 on the same route65.9%
- Delta Air Lines 1594 on the same route61.8%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Tampa International (TPA) 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
- How often a connection fails at the major US hubs
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.