Flight number record
DL 2164
Delta Air Lines · Detroit to Raleigh
- Route
- DTW → RDU
- Departs
- 10:15
- Flights
- 348
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2164, check with Delta Air Lines.
DL 2164 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 348 flights, with a median arrival 12 minutes early.
Set against the rest of the country, DL 2164's record is 12 points better than the US average of 77.3%. That gap is worth roughly 119 fewer late arrivals for every thousand flights.
Key figures
On time
89.2%
Arrivals under 15 minutes late, of 343 completed flights
Avg delay
68 min
Across delayed arrivals only, not all flights
Cancelled
1.44%
National rate is 1.89%
1 hour+ late
5.0%
National rate is 8.3%
These figures cover 348 flights between September 2025 and August 2026. The median arrival is 12 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 2164 flies
DL 2164 flies DTW to RDU without a single fixed slot. Its most common scheduled departure was 10:15, used on 69 of 348 flights, with 10:20 (61 flights) and 10:25 (57 flights) next.
- Departs 10:1569 flights19.8%
- Departs 10:2061 flights17.5%
- Departs 10:2557 flights16.4%
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 10:15 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 2164 runs 5 points better at 89.2%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
DL 2164 next to DTW to RDU
Every carrier on DTW to RDU combined arrived on time 84.3% of the time across 1,480 flights, so DL 2164 is 5 points ahead of it. Delta flew 1,333 flights on the same city pair under all its flight numbers, including this one, and those ran 84.6% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2164thin sample | 348 | 89.2% | 68 min | 1.44% | A |
| All Delta Air Lines on DTW–RDU | 1,333 | 84.6% | 60 min | 1.58% | B |
| All carriers on DTW–RDU | 1,480 | 84.3% | 60 min | 1.69% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2164 quarter by quarter
DL 2164 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Oct–Dec 2025 at 86.7%, a swing of 10 points on roughly 70 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 202530 flights96.7%
- Oct–Dec 202591 flights86.7%
- Jan–Mar 202679 flights87.2%
- Apr–Jun 202686 flights87.1%
- Jul–Sep 202662 flights95.0%
Scale runs 80% to 100%.
By weekday, DL 2164 ranged from 84.0% on Sunday to 92.3% on Tuesday. With about 50 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late DL 2164 runs when it is late
DL 2164 often beats the schedule: 132 of 343 completed flights, 38%, arrived 15 minutes or more early. The 37 late arrivals split 11 under half an hour, 9 between 30 and 60 minutes, and 17 an hour or more.
- 15+ min early132 flights38.5%
- Within 15 min174 flights50.7%
- 15–29 min late11 flights3.2%
- 30–59 min late9 flights2.6%
- 1–2 hours late10 flights2.9%
- 2+ hours late7 flights2.0%
Scale runs 0% to 100%.
Share of 343 completed flights by arrival against schedule.
7 of 34 late departures made up the time and arrived on time, 21% of them. 10 flights left on time and still arrived late.
The worst days
Worst days for DL 2164
The latest arrival of the period was on 17 May 2026, 3 hours 46 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 |
|---|---|---|
| 17 May 2026 | 3 hours 46 minutes | Carrier |
| 10 October 2025 | 3 hours 5 minutes | Carrier |
| 13 December 2025 | 2 hours 27 minutes | Carrier |
| 9 November 2025 | 2 hours 26 minutes | National Airspace System |
| 17 March 2026 | 2 hours 21 minutes | Carrier |
Delay causes
Why DL 2164 runs late
Carrier accounts for 71% of the 2,532 delay minutes carriers reported here, and the remaining four split what is left.
- 71%Carrier
- 17%National Airspace System
- 9%Late-arriving aircraft
- 1%Security
- 1%Extreme weather
The largest share of delay minutes, 71%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,801 of the 2,532 delay minutes reported here. The split is drawn from 2,532 delay minutes reported on DL 2164.
Cancellations sit at 1.44% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
5.0% 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 501 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 same number turns up on one other city pair in the data, including RDU to DTW (239), but none flew often enough under DL 2164 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DTW to RDU only.
One caution: this is a thin sample. 348 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 2164
For a booking, DL 2164 has one of the better records a US domestic flight can show: 89.2% on time and 1.44% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- DTW to RDU, every carrier and departure
- RDU to DTW, the return direction
- Delta Air Lines 1407 on the same route82.8%
- Delta Air Lines 2839 on the same route75.8%
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Raleigh-Durham International (RDU) 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
- Worst months to fly in the US, ranked by the data
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.