Flight number record

DL 1611

Delta Air Lines · Detroit to Atlanta

Route: DTW → ATL
Departs: 07:00
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1611, check with Delta Air Lines.

DL 1611 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 about an hour. That rests on 365 flights, with a median arrival 8 minutes early.

Set against the rest of the country, DL 1611's record is 9 points better than the US average of 77.6%. That gap is worth roughly 93 fewer late arrivals for every thousand flights.

On time

86.9%

Arrivals under 15 minutes late, of 359 completed flights

Avg delay

68 min

Across delayed arrivals only, not all flights

Cancelled

0.82%

National rate is 1.81%

1 hour+ late

3.1%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 8 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 1611 flies

DL 1611 flies DTW to ATL without a single fixed slot. Its most common scheduled departure was 07:00, used on 66 of 365 flights, with 07:15 (50 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:0066 flights18.1%
Departs 07:1550 flights13.7%

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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 1611 runs 2 points worse at 86.9%. 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 1611 next to DTW to ATL

Every carrier on DTW to ATL combined arrived on time 79.0% of the time across 4,881 flights, so DL 1611 is 8 points ahead of it. Delta flew 3,703 flights on the same city pair under all its flight numbers, including this one, and those ran 81.6% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 5 points.

DL 1611 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1611	365	86.9%	68 min	0.82%	A+
All Delta Air Lines on DTW–ATL	3,703	81.6%	68 min	0.49%	B+
All carriers on DTW–ATL	4,881	79.0%	75 min	0.80%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1611 quarter by quarter

DL 1611 did not run the same all year. Its best quarter was Jul–Sep 2025 at 94.6% on time and its weakest Jan–Mar 2026 at 78.2%, a swing of 16 points on roughly 91 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 202592 flights94.6%
Oct–Dec 202592 flights82.4%
Jan–Mar 202690 flights78.2%
Apr–Jun 202691 flights92.1%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1611 did best on Wednesday at 94.2% on time and worst on Sunday at 80.4%. Each day rests on about 52 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1611 runs late

One category carries most of the weight here. Carrier accounts for 60% of the 3,175 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
60%
National Airspace System
31%
Late-arriving aircraft
7%
Extreme weather
2%

The largest share of delay minutes, 60%, 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 1,911 of the 3,175 delay minutes reported here. The split is drawn from 3,175 delay minutes reported on DL 1611.

Cancellations are rare at 0.82%, 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

Badly late arrivals are rare here: only 3.1% 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.

The 594 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.

Every one of the 365 flights under DL 1611 in the data flew DTW to ATL. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 365 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 1611

For a booking, DL 1611 has one of the better records a US domestic flight can show: 86.9% on time and 0.82% 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