Flight number record

DL 2164

Delta Air Lines · Detroit to Raleigh

Route: DTW → RDU
Departs: 10:25
Flights: 348
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 11 points better than the national rate of 77.6%. 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 11 points better than the US average of 77.6%. That gap is worth roughly 105 fewer late arrivals for every thousand flights.

On time

88.1%

Arrivals under 15 minutes late, of 345 completed flights

Avg delay

70 min

Across delayed arrivals only, not all flights

Cancelled

0.86%

National rate is 1.81%

1 hour+ late

6.1%

National rate is 8.1%

These figures cover 348 flights between July 2025 and June 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.

Schedule

When DL 2164 flies

DL 2164 flies DTW to RDU without a single fixed slot. Its most common scheduled departure was 10:25, used on 111 of 348 flights, with 10:20 (61 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:25111 flights31.9%
Departs 10:2061 flights17.5%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 10:25 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 2164 runs 4 points better at 88.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 2164 next to DTW to RDU

Every carrier on DTW to RDU combined arrived on time 83.8% of the time across 1,525 flights, so DL 2164 is 4 points ahead of it. Delta flew 1,337 flights on the same city pair under all its flight numbers, including this one, and those ran 84.2% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 7 points.

DL 2164 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2164thin sample	348	88.1%	70 min	0.86%	A+
All Delta Air Lines on DTW–RDU	1,337	84.2%	63 min	1.20%	B
All carriers on DTW–RDU	1,525	83.8%	63 min	1.31%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2164 quarter by quarter

Quarter by quarter DL 2164 held fairly steady: 91.3% in Jul–Sep 2025, 86.7% in Oct–Dec 2025, 87.2% in Jan–Mar 2026 and 87.1% in Apr–Jun 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights91.3%
Oct–Dec 202591 flights86.7%
Jan–Mar 202679 flights87.2%
Apr–Jun 202686 flights87.1%

Scale runs 80% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2164 ranged from 84.6% on Saturday to 92.2% on Monday. 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.

Delay causes

Why DL 2164 runs late

One category carries most of the weight here. Carrier accounts for 77% of the 2,862 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.

Carrier
77%
National Airspace System
15%
Late-arriving aircraft
7%
Security
1%

The largest share of delay minutes, 77%, 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 2,206 of the 2,862 delay minutes reported here. The split is drawn from 2,862 delay minutes reported on DL 2164.

Cancellations are rare at 0.86%, below the national 1.81% 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 routes

What a delay on this flight costs

6.1% 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 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. 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.

DL 2164 is not only a DTW to RDU flight. It also flew RDU to DTW (296 flights, 84.6% 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. 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.

Other routes flown as DL 2164
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
RDU to DTWthin sample	296	84.6%	81 min	1.01%	B

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: 88.1% on time and 0.86% cancelled. That is a base rate, not a promise about any single day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures