Flight number record
DL 1355
Delta Air Lines · Detroit to Tampa
- Route
- DTW → TPA
- Departs
- 19:59
- Flights
- 349
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1355, check with Delta Air Lines.
DL 1355 lands a B+, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 349 flights, with a median arrival 3 minutes early.
Key figures
On time
76.9%
Arrivals under 15 minutes late, of 346 completed flights
Avg delay
70 min
Across delayed arrivals only, not all flights
Cancelled
0.86%
National rate is 1.89%
1 hour+ late
6.4%
National rate is 8.3%
These figures cover 349 flights between September 2025 and August 2026. The median arrival is 3 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 1355 flies
DL 1355 flies DTW to TPA without a single fixed slot. Its most common scheduled departure was 19:59, used on 48 of 349 flights, with 20:30 (38 flights) and 21:15 (36 flights) next.
- Departs 19:5948 flights13.8%
- Departs 20:3038 flights10.9%
- Departs 21:1536 flights10.3%
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 19:59 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 1355 runs 9 points better at 76.9%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 1355 next to DTW to TPA
Every carrier on DTW to TPA combined arrived on time 78.7% of the time across 2,290 flights, so DL 1355 is 2 points behind it. Delta flew 1,716 flights on the same city pair under all its flight numbers, including this one, and those ran 81.5% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1355thin sample | 349 | 76.9% | 70 min | 0.86% | B+ |
| All Delta Air Lines on DTW–TPA | 1,716 | 81.5% | 63 min | 1.22% | B |
| All carriers on DTW–TPA | 2,290 | 78.7% | 65 min | 1.88% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1355 quarter by quarter
Quarter by quarter DL 1355 held fairly steady: 77.1% in Oct–Dec 2025, 70.5% in Jan–Mar 2026, 80.2% in Apr–Jun 2026 and 75.8% 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 202522 flights—
- Oct–Dec 202584 flights77.1%
- Jan–Mar 202690 flights70.5%
- Apr–Jun 202691 flights80.2%
- Jul–Sep 202662 flights75.8%
Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1355 did best on Thursday at 90.2% on time and worst on Sunday at 66.7%. Each day rests on about 50 flights, so a gap of 24 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1355 runs when it is late
The 80 late arrivals split 33 under half an hour, 25 between 30 and 60 minutes, and 22 an hour or more.
- 15+ min early72 flights20.8%
- Within 15 min194 flights56.1%
- 15–29 min late33 flights9.5%
- 30–59 min late25 flights7.2%
- 1–2 hours late15 flights4.3%
- 2+ hours late7 flights2.0%
Scale runs 0% to 100%.
Share of 346 completed flights by arrival against schedule.
26 of 90 late departures made up the time and arrived on time, 29% of them. 16 flights left on time and still arrived late.
The worst days
Worst days for DL 1355
The latest arrival of the period was on 14 January 2026, 18 hours 39 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 January 2026 | 18 hours 39 minutes | Extreme weather |
| 1 December 2025 | 11 hours 37 minutes | Carrier |
| 9 July 2026 | 3 hours 12 minutes | Carrier |
| 3 January 2026 | 2 hours 26 minutes | National Airspace System |
| 16 March 2026 | 2 hours 24 minutes | Carrier |
Delay causes
Why DL 1355 runs late
Carrier accounts for 50% of the 5,603 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Carrier
- 21%Extreme weather
- 19%National Airspace System
- 10%Late-arriving aircraft
Extreme weather accounts for 21% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 3.5 times the usual weather exposure. The split is drawn from 5,603 delay minutes reported on DL 1355.
Cancellations are rare at 0.86%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
6.4% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
The 983 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
Every one of the 349 flights under DL 1355 in the data flew DTW to TPA. 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. 349 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 1355
For a booking, read DL 1355 as 76.9% on time with 0.86% cancelled over 349 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DTW to TPA, every carrier and departure
- TPA to DTW, the return direction
- Delta Air Lines 1243 on the same route81.0%
- Delta Air Lines 2852 on the same route88.0%
- Delta Air Lines 2587 on the same route79.8%
- Detroit Metropolitan Wayne County (DTW) 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
- The best time of day to fly, according to 7.05 million flight records
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.