Flight number record
DL 1275
Delta Air Lines · Raleigh to Tampa
- Route
- RDU → TPA
- Departs
- 18:04
- Flights
- 268
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1275, check with Delta Air Lines.
DL 1275 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 268 flights, with a median arrival 7 minutes early.
Key figures
On time
74.8%
Arrivals under 15 minutes late, of 262 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
2.24%
National rate is 1.89%
1 hour+ late
12.2%
National rate is 8.3%
These figures cover 268 flights between September 2025 and August 2026. Beyond the headline rate, 12.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 1275 flies
DL 1275 flies RDU to TPA without a single fixed slot. Its most common scheduled departure was 18:04, used on 74 of 268 flights, with 18:07 (58 flights) and 18:05 (35 flights) next.
- Departs 18:0474 flights27.6%
- Departs 18:0758 flights21.6%
- Departs 18:0535 flights13.1%
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 18:04 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 1275 runs 7 points better at 74.8%. 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 1275 next to RDU to TPA
Every carrier on RDU to TPA combined arrived on time 82.2% of the time across 1,294 flights, so DL 1275 is 7 points behind it. Delta flew 651 flights on the same city pair under all its flight numbers, including this one, and those ran 84.7% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1275thin sample | 268 | 74.8% | 75 min | 2.24% | C |
| All Delta Air Lines on RDU–TPA | 651 | 84.7% | 72 min | 1.84% | B |
| All carriers on RDU–TPA | 1,294 | 82.2% | 66 min | 2.09% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1275 quarter by quarter
DL 1275 did not run the same all year. Its best quarter was Jan–Mar 2026 at 81.0% on time and its weakest Jul–Sep 2026 at 55.8%, a swing of 25 points on roughly 67 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 202517 flights—
- Oct–Dec 202567 flights80.3%
- Jan–Mar 202644 flights81.0%
- Apr–Jun 202687 flights77.6%
- Jul–Sep 202653 flights55.8%
Scale runs 45% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1275 did best on Friday at 80.0% on time and worst on Sunday at 67.4%. Each day rests on about 38 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1275 runs when it is late
DL 1275 often beats the schedule: 77 of 262 completed flights, 29%, arrived 15 minutes or more early. The 66 late arrivals split 16 under half an hour, 18 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early77 flights29.4%
- Within 15 min119 flights45.4%
- 15–29 min late16 flights6.1%
- 30–59 min late18 flights6.9%
- 1–2 hours late19 flights7.3%
- 2+ hours late13 flights5.0%
Scale runs 0% to 100%.
Share of 262 completed flights by arrival against schedule.
10 of 68 late departures made up the time and arrived on time, 15% of them. 8 flights left on time and still arrived late.
The worst days
Worst days for DL 1275
The latest arrival of the period was on 26 May 2026, 3 hours 49 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 26 May 2026 | 3 hours 49 minutes | Carrier |
| 6 July 2026 | 3 hours 48 minutes | Extreme weather |
| 29 November 2025 | 3 hours 36 minutes | Carrier |
| 1 June 2026 | 3 hours 28 minutes | Carrier |
| 7 April 2026 | 3 hours 23 minutes | Carrier |
Delay causes
Why DL 1275 runs late
Late-arriving aircraft accounts for 48% of the 4,968 delay minutes carriers reported here, and the remaining four split what is left.
- 48%Late-arriving aircraft
- 32%Carrier
- 14%National Airspace System
- 5%Extreme weather
48% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,968 reported delay minutes here, that single category outweighs weather by 9 to one. The split is drawn from 4,968 delay minutes reported on DL 1275.
Cancellations sit at 2.24% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
12.2% 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 587 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.
DL 1275 is not only a RDU to TPA flight. It also flew TPA to RDU (268 flights, 78.5% 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. 268 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 RDUthin sample | 268 | 78.5% | 77 min | 2.61% | B |
What to do with this
Booking DL 1275
For a booking, DL 1275 is a flight to put a long connection behind. 12.2% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- RDU to TPA, every carrier and departure
- TPA to RDU, the return direction
- Delta Air Lines 1279 on the same route92.7%
- Raleigh-Durham International (RDU) 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
- 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.