Flight number record

DL 2235

Delta Air Lines · Denver to Atlanta

Route: DEN → ATL
Departs: 09:39
Flights: 263
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 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 9 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 40 minutes. That rests on 263 flights, with a median arrival 7 minutes early.

Set against the rest of the country, DL 2235's record is 9 points better than the US average of 77.3%. That gap is worth roughly 87 fewer late arrivals for every thousand flights.

On time

86.0%

Arrivals under 15 minutes late, of 258 completed flights

Avg delay

41 min

Across delayed arrivals only, not all flights

Cancelled

0.76%

National rate is 1.89%

1 hour+ late

1.6%

National rate is 8.3%

These figures cover 263 flights between September 2025 and August 2026. The median arrival is 7 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.

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Schedule

When DL 2235 flies

DL 2235 flies DEN to ATL without a single fixed slot. Its most common scheduled departure was 09:39, used on 69 of 263 flights, with 10:26 (34 flights) and 09:49 (31 flights) next.

Departs 09:3969 flights26.2%
Departs 10:2634 flights12.9%
Departs 09:4931 flights11.8%

Scale runs 0% to 100%.

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

A 09:39 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 2235 runs 2 points better at 86.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

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Against the route

DL 2235 next to DEN to ATL

Every carrier on DEN to ATL combined arrived on time 78.6% of the time across 5,603 flights, so DL 2235 is 7 points ahead of it. Delta flew 2,807 flights on the same city pair under all its flight numbers, including this one, and those ran 85.8% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 5 points.

DL 2235 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2235thin sample	263	86.0%	41 min	0.76%	A+
All Delta Air Lines on DEN–ATL	2,807	85.8%	61 min	1.18%	A
All carriers on DEN–ATL	5,603	78.6%	58 min	0.93%	B+
Delta Air Lines, whole network	1,039,517	81.1%	71 min	1.74%	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 2026 at 76.4%, a swing of 15 points on roughly 88 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 202526 flights—
Oct–Dec 202579 flights91.1%
Jan–Mar 202624 flights—
Apr–Jun 202676 flights85.5%
Jul–Sep 202658 flights76.4%

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

By weekday, DL 2235 ranged from 82.5% on Wednesday to 89.2% on Friday. With about 38 flights behind each day, a spread of 7 points is inside normal variation, so the day you fly is not worth changing for this flight.

Arrival by arrival

How late DL 2235 runs when it is late

The 36 late arrivals split 16 under half an hour, 16 between 30 and 60 minutes, and 4 an hour or more.

15+ min early57 flights22.1%
Within 15 min165 flights64.0%
15–29 min late16 flights6.2%
30–59 min late16 flights6.2%
1–2 hours late3 flights1.2%
2+ hours late1 flights0.4%

Scale runs 0% to 100%.

Share of 258 completed flights by arrival against schedule.

7 of 27 late departures made up the time and arrived on time, 26% of them. In the other direction, 16 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at ATL.

The worst days

Worst days for DL 2235

The latest arrival of the period was on 2 May 2026, 2 hours 44 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.

The latest arrivals of DL 2235 in the period
Date	Arrived late by	Largest filed cause
2 May 2026	2 hours 44 minutes	Late-arriving aircraft
2 June 2026	1 hour 29 minutes	Carrier
3 December 2025	1 hour 28 minutes	Late-arriving aircraft
26 January 2026	1 hour 15 minutes	Late-arriving aircraft
25 November 2025	57 minutes	Late-arriving aircraft

Delay causes

Why DL 2235 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 1,459 reported delay minutes.

Late-arriving aircraft
40%
National Airspace System
34%
Carrier
25%
Extreme weather
1%

40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 1,459 reported delay minutes here, that single category outweighs weather by 40 to one. The split is drawn from 1,459 delay minutes reported on DL 2235.

Cancellations are rare at 0.76%, below the national 1.89% 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 1.6% land an hour or more behind schedule, against 8.3% 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.

The same number turns up on three other city pairs in the data, including ATL to DEN (196), 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. 263 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: 86.0% on time and 0.76% 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures