Flight number record

DL 2235

Delta Air Lines · Denver to Atlanta

Route: DEN → ATL
Departs: 10:26
Flights: 256
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2235, check with Delta Air Lines.

DL 2235 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 8 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 45 minutes. That rests on 256 flights, with a median arrival 8 minutes early.

Set against the rest of the country, DL 2235's record is 8 points better than the US average of 77.6%. That gap is worth roughly 82 fewer late arrivals for every thousand flights.

On time

85.8%

Arrivals under 15 minutes late, of 254 completed flights

Avg delay

45 min

Across delayed arrivals only, not all flights

Cancelled

0.78%

National rate is 1.81%

1 hour+ late

2.8%

National rate is 8.1%

These figures cover 256 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 2235 flies

DL 2235 flies DEN to ATL without a single fixed slot. Its most common scheduled departure was 10:26, used on 34 of 256 flights, with 09:49 (31 flights) and 09:35 (30 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:2634 flights13.3%
Departs 09:4931 flights12.1%
Departs 09:3530 flights11.7%

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 10:26 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and DL 2235 runs level with that at 85.8%. 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 2235 next to DEN to ATL

Every carrier on DEN to ATL combined arrived on time 80.0% of the time across 5,596 flights, so DL 2235 is 6 points ahead of it. Delta flew 2,805 flights on the same city pair under all its flight numbers, including this one, and those ran 86.3% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 4 points.

DL 2235 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2235thin sample	256	85.8%	45 min	0.78%	A+
All Delta Air Lines on DEN–ATL	2,805	86.3%	71 min	1.07%	A
All carriers on DEN–ATL	5,596	80.0%	62 min	0.86%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2235 quarter by quarter

DL 2235 did not run the same all year. Its best quarter was Oct–Dec 2025 at 91.1% on time and its weakest Jul–Sep 2025 at 77.9%, a swing of 13 points on roughly 85 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 202577 flights77.9%
Oct–Dec 202579 flights91.1%
Jan–Mar 202624 flights—
Apr–Jun 202676 flights85.5%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2235 ranged from 82.5% on Monday to 87.5% on Wednesday. With about 37 flights behind each day, a spread of 5 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 2235 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 53% of the 1,634 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.

Late-arriving aircraft
53%
Carrier
24%
National Airspace System
23%
Extreme weather
0%

53% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 1,634 reported delay minutes here, that single category outweighs weather by 53 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 1,634 delay minutes reported on DL 2235.

Cancellations are rare at 0.78%, 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 2.8% 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 1,199 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 three other city pairs in the data, including ATL to DEN (194), AVL to ATL (23) and CLE to ATL (16), but none flew often enough under DL 2235 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to ATL only.

One caution: this is a thin sample. 256 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 2235

For a booking, DL 2235 has one of the better records a US domestic flight can show: 85.8% on time and 0.78% 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