Carrier route record
DLTPA→RDU
Delta Air Lines · Tampa to Raleigh
- Flights
- 649
- Period
- July 2025 to June 2026
- Share of route
- 51%
- Carriers
- 3
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on TPA to RDU earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 649 flights, with a median arrival 14 minutes early.
Set against the rest of the country, Delta's TPA to RDU record is 9 points better than the US average of 77.6%. That gap is worth roughly 86 fewer late arrivals for every thousand flights.
Key figures
On time
86.2%
Arrivals under 15 minutes late, of 636 completed flights
Avg delay
85 min
Across delayed arrivals only, not all flights
Cancelled
2.00%
National rate is 1.81%
Whole route
81.8%
Every carrier on TPA to RDU, 1,280 flights
These figures cover 649 flights between July 2025 and June 2026. The median arrival is 14 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.
Carrier by carrier
Delta against every carrier on TPA to RDU
Delta flew 649 of the 1,280 flights on TPA to RDU, most of the route. Its 86.2% on time is 4 points better than the route as a whole, which runs 81.8%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Delta at 86.2% to Frontier at 76.5%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines (this page) | 649 | 86.2% | 85 min | 2.00% | A |
| Southwest Airlines | 382 | 77.8% | 54 min | 0.79% | B+ |
| Frontier Airlinesthin sample | 249 | 76.5% | 76 min | 2.01% | B |
Flight by flight
Delta flight numbers on TPA to RDU
Departure window
When Delta runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 11 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am—
- 8am–11am364 flights90.8%
- 11am–2pm—
- 2pm–5pm—
- 5pm–8pm—
- 8pm–5am285 flights80.3%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 90.8% of the time, against 80.3% for the overnight window. That is 11 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 364 flights scheduled in it.
Across the year
Delta on TPA to RDU through the year
July is the worst month at 73.7% on time, 23 points below October, the best at 96.2%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. May was the busiest month here, with 62 flights.
Across the week, Wednesday is the strongest day at 90.3% on time and Sunday the weakest at 81.1%. 9 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Delta runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 67% of the 7,462 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 67%Late-arriving aircraft
- 25%Carrier
- 8%National Airspace System
- 1%Extreme weather
67% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 7,462 reported delay minutes here, that single category outweighs weather by 67 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 7,462 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 90.8% on time here.
Cancellations sit at 2.00% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
6.9% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.
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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg runs 84.3% on time across 649 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 649 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 Delta on TPA to RDU
Put together: treat all of this as provisional. 649 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 86.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 636 completed flights over 12 months sit behind that.
Related
Where to go next
- TPA to RDU, every carrier
- Delta on RDU to TPA, the return leg
- Southwest Airlines on TPA to RDU77.8%
- Frontier Airlines on TPA to RDU76.5%
- Delta Air Lines network-wide record
- Tampa International (TPA) delay statistics
- Raleigh-Durham International (RDU) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.