Carrier route record
DLFLL→RDU
Delta Air Lines · Fort Lauderdale to Raleigh
- Flights
- 364
- Period
- September 2025 to August 2026
- Share of route
- 26%
- Carriers
- 5
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on FLL to RDU sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 364 flights, with a median arrival 3 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate Delta on FLL to RDU from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
75.0%
Arrivals under 15 minutes late, of 360 completed flights
Avg delay
92 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
Whole route
67.9%
Every carrier on FLL to RDU, 1,402 flights
These figures cover 364 flights between September 2025 and August 2026. Beyond the headline rate, 10.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Delta against every carrier on FLL to RDU
Delta flew 364 of the 1,402 flights on FLL to RDU, about 26% of it. Its 75.0% on time is 7 points better than the route as a whole, which runs 67.9%. Ranked by on-time rate it is first of five carriers on the route, where the range runs from Delta at 75.0% to Southwest at 59.4%. Three 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)thin sample | 364 | 75.0% | 92 min | 0.55% | B+ |
| JetBlue Airways | 668 | 67.6% | 67 min | 2.40% | C |
| Frontier Airlinesthin sample | 70 | 67.6% | 97 min | 0.00% | C+ |
| Spirit Airlinesthin sample | 158 | 60.4% | 74 min | 5.70% | D− |
| Southwest Airlinesthin sample | 142 | 59.4% | 52 min | 2.82% | D |
Flight by flight
Delta flight numbers on FLL to RDU
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Departure window
When Delta runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 364 flights.
There are not enough flights in each departure window to split Delta's FLL to RDU record by time of day without the percentages moving on noise. The headline rate of 75.0% is the reliable figure here.
Across the year
Delta on FLL to RDU through the year
December is the weak month at 64.5% on time, against 96.8% in October. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. January was the busiest month here, with 31 flights.
Across the week, Wednesday is the strongest day at 84.6% on time and Sunday the weakest at 52.9%, a spread of 32 points.
Arrival by arrival
How late Delta on FLL to RDU runs when it is late
The 90 late arrivals split 23 under half an hour, 31 between 30 and 60 minutes, and 36 an hour or more.
- 15+ min early85 flights23.6%
- Within 15 min185 flights51.4%
- 15–29 min late23 flights6.4%
- 30–59 min late31 flights8.6%
- 1–2 hours late19 flights5.3%
- 2+ hours late17 flights4.7%
Scale runs 0% to 100%.
Share of 360 completed flights by arrival against schedule.
19 of 93 late departures made up the time and arrived on time, 20% of them. 16 flights left on time and still arrived late.
The worst days
Worst days for Delta on FLL to RDU
The latest arrival of the period was on 2 January 2026, 14 hours 52 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 2 January 2026 | 14 hours 52 minutes | Carrier |
| 16 March 2026 | 9 hours 33 minutes | Late-arriving aircraft |
| 29 November 2025 | 7 hours 44 minutes | Carrier |
| 7 March 2026 | 6 hours 5 minutes | Late-arriving aircraft |
| 29 September 2025 | 5 hours 34 minutes | Carrier |
Delay causes
Why Delta runs late on this route
Late-arriving aircraft accounts for 51% of the 8,248 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Late-arriving aircraft
- 33%Carrier
- 13%National Airspace System
- 4%Extreme weather
51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 8,248 reported delay minutes here, that single category outweighs weather by 13 to one. The split is drawn from 8,248 reported delay minutes.
Cancellations are rare at 0.55%, 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 stage length
What a delay here costs
10.0% 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 680 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.
The return leg is a different operation and performs like one: it runs 80.8% on time across 364 flights, 6 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 6 points of difference.
One caution: this is a thin sample. 364 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 FLL to RDU
Put together: treat all of this as provisional. 364 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 75.0% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 360 completed flights over 12 months sit behind that.
Related
Where to go next
- FLL to RDU, every carrier
- Delta on RDU to FLL, the return leg
- JetBlue Airways on FLL to RDU67.6%
- Spirit Airlines on FLL to RDU60.4%
- Southwest Airlines on FLL to RDU59.4%
- Delta Air Lines network-wide record
- Fort Lauderdale-Hollywood International (FLL) delay statistics
- Raleigh-Durham International (RDU) delay statistics
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
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.