Flight number record

DL 1011

Delta Air Lines · Atlanta to Hartford

Route: ATL → BDL
Departs: 21:35
Flights: 361
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1011, check with Delta Air Lines.

DL 1011 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 361 flights, with a median arrival right on schedule.

The national on-time rate over the same period is 77.6%, so DL 1011 runs 6 points behind the country as a whole. Across a thousand flights that is about 58 extra late arrivals.

On time

71.8%

Arrivals under 15 minutes late, of 351 completed flights

Avg delay

72 min

Across delayed arrivals only, not all flights

Cancelled

2.49%

National rate is 1.81%

1 hour+ late

10.0%

National rate is 8.1%

These figures cover 361 flights between July 2025 and June 2026. Beyond the headline rate, 10.0% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When DL 1011 flies

DL 1011 flies ATL to BDL without a single fixed slot. Its most common scheduled departure was 21:35, used on 64 of 361 flights, with 21:25 (50 flights) and 21:44 (44 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:3564 flights17.7%
Departs 21:2550 flights13.9%
Departs 21:4444 flights12.2%

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 21:35 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 1011 runs level with that at 71.8%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

DL 1011 next to ATL to BDL

Every carrier on ATL to BDL combined arrived on time 79.2% of the time across 2,328 flights, so DL 1011 is 7 points behind it. Delta flew 2,211 flights on the same city pair under all its flight numbers, including this one, and those ran 79.3% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 10 points.

DL 1011 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1011thin sample	361	71.8%	72 min	2.49%	C
All Delta Air Lines on ATL–BDL	2,211	79.3%	62 min	2.04%	B
All carriers on ATL–BDL	2,328	79.2%	63 min	2.02%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1011 quarter by quarter

DL 1011 did not run the same all year. Its best quarter was Jan–Mar 2026 at 77.9% on time and its weakest Jul–Sep 2025 at 65.2%, a swing of 13 points on roughly 90 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 flights65.2%
Oct–Dec 202589 flights69.0%
Jan–Mar 202690 flights77.9%
Apr–Jun 202690 flights75.3%

Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1011 did best on Wednesday at 80.8% on time and worst on Monday at 58.0%. Each day rests on about 52 flights, so a gap of 23 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1011 runs late

One category carries most of the weight here. Carrier accounts for 53% of the 7,172 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
53%
Late-arriving aircraft
26%
National Airspace System
12%
Extreme weather
9%

The largest share of delay minutes, 53%, 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 3,771 of the 7,172 delay minutes reported here. The split is drawn from 7,172 delay minutes reported on DL 1011.

Cancellations sit at 2.49% against a national 1.81%, which is ordinary. Diversions add another 0.28%.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.0% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

The 859 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 361 flights under DL 1011 in the data flew ATL to BDL. 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. 361 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 1011

For a booking, DL 1011 is one of the weaker ways to fly ATL to BDL: 7 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.

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