Flight number record
DL 2431
Delta Air Lines · Detroit to Denver
- Route
- DTW → DEN
- Departs
- 16:18
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2431, check with Delta Air Lines.
DL 2431 sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 365 flights, with a median arrival 2 minutes early.
The national on-time rate over the same period is 77.3%, so DL 2431 runs 7 points behind the country as a whole. Across a thousand flights that is about 69 extra late arrivals.
Key figures
On time
70.4%
Arrivals under 15 minutes late, of 362 completed flights
Avg delay
57 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
8.8%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. Beyond the headline rate, 8.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 2431 flies
DL 2431 flies DTW to DEN without a single fixed slot. Its most common scheduled departure was 16:18, used on 64 of 365 flights, with 16:11 (47 flights) and 16:15 (42 flights) next.
- Departs 16:1864 flights17.5%
- Departs 16:1147 flights12.9%
- Departs 16:1542 flights11.5%
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 16:18 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and DL 2431 runs level with that at 70.4%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 2431 next to DTW to DEN
Every carrier on DTW to DEN combined arrived on time 79.5% of the time across 3,110 flights, so DL 2431 is 9 points behind it. Delta flew 1,248 flights on the same city pair under all its flight numbers, including this one, and those ran 79.2% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2431 | 365 | 70.4% | 57 min | 0.00% | C+ |
| All Delta Air Lines on DTW–DEN | 1,248 | 79.2% | 57 min | 0.16% | B+ |
| All carriers on DTW–DEN | 3,110 | 79.5% | 62 min | 0.51% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2431 quarter by quarter
DL 2431 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.0% on time and its weakest Jul–Sep 2026 at 63.9%, a swing of 26 points on roughly 73 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 202530 flights90.0%
- Oct–Dec 202592 flights73.6%
- Jan–Mar 202690 flights65.6%
- Apr–Jun 202691 flights70.0%
- Jul–Sep 202662 flights63.9%
Scale runs 55% to 95%.
By weekday, DL 2431 did best on Saturday at 80.8% on time and worst on Friday at 58.8%. Each day rests on about 52 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2431 runs when it is late
The 107 late arrivals split 33 under half an hour, 42 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early66 flights18.2%
- Within 15 min189 flights52.2%
- 15–29 min late33 flights9.1%
- 30–59 min late42 flights11.6%
- 1–2 hours late24 flights6.6%
- 2+ hours late8 flights2.2%
Scale runs 0% to 100%.
Share of 362 completed flights by arrival against schedule.
14 of 82 late departures made up the time and arrived on time, 17% of them. In the other direction, 39 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 DEN.
The worst days
Worst days for DL 2431
The latest arrival of the period was on 14 June 2026, 3 hours 53 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 June 2026 | 3 hours 53 minutes | Carrier |
| 30 November 2025 | 3 hours 40 minutes | Carrier |
| 6 March 2026 | 3 hours 31 minutes | National Airspace System |
| 6 October 2025 | 3 hours 13 minutes | Carrier |
| 8 June 2026 | 3 hours 9 minutes | Carrier |
Delay causes
Why DL 2431 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 6,080 reported delay minutes.
- 40%Carrier
- 39%National Airspace System
- 19%Late-arriving aircraft
- 2%Extreme weather
The largest share of delay minutes, 40%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,417 of the 6,080 delay minutes reported here. The split is drawn from 6,080 delay minutes reported on DL 2431.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
8.8% of arrivals land an hour or more late, close to the national 8.3%, so 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 1,123 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.
Every one of the 365 flights under DL 2431 in the data flew DTW to DEN. 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 2431
For a booking, DL 2431 is one of the weaker ways to fly DTW to DEN: 9 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.
Related
Where to go next
- DTW to DEN, every carrier and departure
- DEN to DTW, the return direction
- United Airlines 302 on the same route81.1%
- Delta Air Lines 1113 on the same route85.7%
- Delta Air Lines 1648 on the same route83.7%
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Denver International (DEN) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
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 ; recomputed monthly. How this data is collected.