Flight number record

DL 2735

Delta Air Lines · Atlanta to Hartford

Route: ATL → BDL
Departs: 15:39
Flights: 307
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2735, check with Delta Air Lines.

DL 2735 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 307 flights, with a median arrival right on schedule.

On time

74.9%

Arrivals under 15 minutes late, of 299 completed flights

Avg delay

56 min

Across delayed arrivals only, not all flights

Cancelled

2.28%

National rate is 1.81%

1 hour+ late

8.4%

National rate is 8.1%

These figures cover 307 flights between July 2025 and June 2026. Beyond the headline rate, 8.4% 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 2735 flies

DL 2735 flies ATL to BDL without a single fixed slot. Its most common scheduled departure was 15:39, used on 33 of 307 flights, with 15:49 (31 flights) and 15:37 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:3933 flights10.7%
Departs 15:4931 flights10.1%
Departs 15:3731 flights10.1%

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 15:39 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and DL 2735 runs 3 points better at 74.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 2735 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 2735 is 4 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 7 points.

DL 2735 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2735thin sample	307	74.9%	56 min	2.28%	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 2735 quarter by quarter

DL 2735 did not run the same all year. Its best quarter was Apr–Jun 2026 at 85.4% on time and its weakest Jul–Sep 2025 at 66.7%, a swing of 19 points on roughly 77 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 flights66.7%
Oct–Dec 202588 flights74.4%
Jan–Mar 202644 flights73.2%
Apr–Jun 202683 flights85.4%

Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2735 did best on Monday at 84.4% on time and worst on Tuesday at 62.5%. Each day rests on about 44 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2735 runs late

One category carries most of the weight here. Carrier accounts for 43% of the 4,228 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
43%
Late-arriving aircraft
29%
National Airspace System
25%
Extreme weather
1%
Security
1%

The largest share of delay minutes, 43%, 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 1,830 of the 4,228 delay minutes reported here. The split is drawn from 4,228 delay minutes reported on DL 2735.

Cancellations sit at 2.28% against a national 1.81%, which is ordinary. Diversions add another 0.33%.

Connections and routes

What a delay on this flight costs

8.4% 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 about an hour, which a normal layover absorbs.

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.

The same number turns up on one other city pair in the data, including BDL to ATL (183), but none flew often enough under DL 2735 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATL to BDL only.

One caution: this is a thin sample. 307 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 2735

For a booking, read DL 2735 as 74.9% on time with 2.28% cancelled over 307 flights. Those are rates from the past twelve months, not a forecast for any particular 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