Carrier route record
DLATL→RDU
Delta Air Lines · Atlanta to Raleigh
- Flights
- 3,799
- Period
- July 2025 to June 2026
- Share of route
- 82%
- Carriers
- 3
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on ATL to RDU lands a B, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 3,799 flights, with a median arrival 5 minutes early.
Set against the rest of the country, Delta's ATL to RDU record is 6 points better than the US average of 77.6%. That gap is worth roughly 56 fewer late arrivals for every thousand flights.
Key figures
On time
83.2%
Arrivals under 15 minutes late, of 3,749 completed flights
Avg delay
56 min
Across delayed arrivals only, not all flights
Cancelled
1.24%
National rate is 1.81%
Whole route
80.4%
Every carrier on ATL to RDU, 4,617 flights
These figures cover 3,799 flights between July 2025 and June 2026. The median arrival is 5 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 ATL to RDU
Delta flew 3,799 of the 4,617 flights on ATL to RDU, most of the route. Its 83.2% on time is 3 points better than the route as a whole, which runs 80.4%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Southwest at 83.6% to Frontier at 60.2%. 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 |
|---|---|---|---|---|---|
| Southwest Airlinesthin sample | 247 | 83.6% | 63 min | 1.21% | B |
| Delta Air Lines (this page) | 3,799 | 83.2% | 56 min | 1.24% | B |
| Frontier Airlines | 571 | 60.2% | 75 min | 2.80% | D |
Flight by flight
Delta flight numbers on ATL 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 17 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–8am279 flights94.2%
- 8am–11am718 flights92.1%
- 11am–2pm579 flights85.9%
- 2pm–5pm645 flights81.3%
- 5pm–8pm642 flights76.9%
- 8pm–5am936 flights77.0%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 94.2% of the time, against 76.9% for the evening window. That is 17 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 936 flights scheduled in it.
Across the year
Delta on ATL to RDU through the year
July is the worst month at 71.8% on time, 20 points below September, the best at 91.4%. 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. July was the busiest month here, with 346 flights.
Across the week, Wednesday is the strongest day at 88.8% on time and Sunday the weakest at 79.8%. 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. Carrier accounts for 46% of the 36,000 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.
- 46%Carrier
- 26%Late-arriving aircraft
- 17%National Airspace System
- 10%Extreme weather
- 0%Security
The largest share of delay minutes, 46%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 17,000 of the 36,000 delay minutes reported here. The split is drawn from 35,557 reported delay minutes.
Cancellations sit at 1.24% against a national 1.81%, which is ordinary. Diversions add another 0.08%.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 4.6% land an hour or more behind schedule, against 8.1% 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.
At 356 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 89.5% on time across 3,800 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.
The sample behind these figures is 3,799 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking Delta on ATL to RDU
Put together: the calendar is the biggest lever here, not the carrier or the hour. September runs 91.4% on time and July 71.8%, a swing of 20 points. If the dates move at all, move them out of July before you think about anything else. 3,749 completed flights over 12 months sit behind that.
Related
Where to go next
- ATL to RDU, every carrier
- Delta on RDU to ATL, the return leg
- Southwest Airlines on ATL to RDU83.6%
- Frontier Airlines on ATL to RDU60.2%
- Delta Air Lines network-wide record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Raleigh-Durham International (RDU) delay statistics
- The best time of day to fly, according to 7.04 million flight records
- Worst months to fly in the US, ranked by the data
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.