Flight number record
DL 1227
Delta Air Lines · Atlanta to Tampa
- Route
- ATL → TPA
- Departs
- 08:25
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1227, check with Delta Air Lines.
DL 1227 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 14 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 55 minutes. That rests on 365 flights, with a median arrival 8 minutes early.
Set against the rest of the country, DL 1227's record is 14 points better than the US average of 77.3%. That gap is worth roughly 135 fewer late arrivals for every thousand flights.
Key figures
On time
90.8%
Arrivals under 15 minutes late, of 358 completed flights
Avg delay
54 min
Across delayed arrivals only, not all flights
Cancelled
1.64%
National rate is 1.89%
1 hour+ late
3.1%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. The median arrival is 8 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 1227 flies
DL 1227 flies ATL to TPA without a single fixed slot. Its most common scheduled departure was 08:25, used on 128 of 365 flights, with 08:35 (81 flights) and 08:37 (44 flights) next.
- Departs 08:25128 flights35.1%
- Departs 08:3581 flights22.2%
- Departs 08:3744 flights12.1%
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 08:25 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 1227 runs 7 points better at 90.8%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 1227 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 1227 is 18 points ahead of 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 beats by 10 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1227 | 365 | 90.8% | 54 min | 1.64% | A |
| 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 1227 quarter by quarter
Quarter by quarter DL 1227 held fairly steady: 90.0% in Jul–Sep 2025, 89.0% in Oct–Dec 2025, 90.8% in Jan–Mar 2026, 90.1% in Apr–Jun 2026 and 94.9% in Jul–Sep 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights90.0%
- Oct–Dec 202592 flights89.0%
- Jan–Mar 202690 flights90.8%
- Apr–Jun 202691 flights90.1%
- Jul–Sep 202662 flights94.9%
Scale runs 80% to 100%.
By weekday, DL 1227 ranged from 84.6% on Friday to 96.1% on Thursday. With about 52 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 1227 runs when it is late
The 33 late arrivals split 12 under half an hour, 10 between 30 and 60 minutes, and 11 an hour or more.
- 15+ min early71 flights19.8%
- Within 15 min254 flights70.9%
- 15–29 min late12 flights3.4%
- 30–59 min late10 flights2.8%
- 1–2 hours late9 flights2.5%
- 2+ hours late2 flights0.6%
Scale runs 0% to 100%.
Share of 358 completed flights by arrival against schedule.
7 of 34 late departures made up the time and arrived on time, 21% of them. Only 6 left on time and still arrived late.
The worst days
Worst days for DL 1227
The latest arrival of the period was on 21 September 2025, 4 hours 54 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 September 2025 | 4 hours 54 minutes | Carrier |
| 1 February 2026 | 3 hours 13 minutes | Carrier |
| 22 May 2026 | 1 hour 43 minutes | Carrier |
| 19 July 2026 | 1 hour 24 minutes | Carrier |
| 7 March 2026 | 1 hour 22 minutes | Carrier |
Delay causes
Why DL 1227 runs late
Carrier accounts for 76% of the 1,766 delay minutes carriers reported here, and the remaining four split what is left.
- 76%Carrier
- 13%National Airspace System
- 10%Late-arriving aircraft
The largest share of delay minutes, 76%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,345 of the 1,766 delay minutes reported here. The split is drawn from 1,766 delay minutes reported on DL 1227.
Cancellations sit at 1.64% against a national 1.89%, which is ordinary. Diversions add another 0.27%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.1% 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 1227 is not only a ATL to TPA flight. It also flew TPA to ATL (365 flights, 86.6% 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. 365 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 |
|---|---|---|---|---|---|
| TPA to ATL | 365 | 86.6% | 54 min | 1.64% | A |
What to do with this
Booking DL 1227
For a booking, read DL 1227 as 90.8% on time with 1.64% cancelled over 365 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 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%
- Delta Air Lines 1720 on the same route70.5%
- 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
- Worst months to fly in the US, ranked by the data
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.