Flight number record
DL 2126
Delta Air Lines · Detroit to Nashville
- Route
- DTW → BNA
- Departs
- 21:35
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2126, check with Delta Air Lines.
DL 2126 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 77.3%. The late ones land about an hour behind schedule. That rests on 364 flights, with a median arrival 4 minutes early.
Key figures
On time
74.2%
Arrivals under 15 minutes late, of 361 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
0.82%
National rate is 1.89%
1 hour+ late
8.9%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. Beyond the headline rate, 8.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 2126 flies
DL 2126 flies DTW to BNA without a single fixed slot. Its most common scheduled departure was 21:35, used on 43 of 364 flights, with 19:45 (37 flights) next.
- Departs 21:3543 flights11.8%
- Departs 19:4537 flights10.2%
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 21:35 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 2126 runs 4 points better at 74.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 2126 next to DTW to BNA
Every carrier on DTW to BNA combined arrived on time 78.1% of the time across 2,413 flights, so DL 2126 is 4 points behind it. Delta flew 1,405 flights on the same city pair under all its flight numbers, including this one, and those ran 79.9% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2126thin sample | 364 | 74.2% | 58 min | 0.82% | C+ |
| All Delta Air Lines on DTW–BNA | 1,405 | 79.9% | 57 min | 1.78% | B |
| All carriers on DTW–BNA | 2,413 | 78.1% | 52 min | 1.33% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2126 quarter by quarter
DL 2126 did not run the same all year. Its best quarter was Jul–Sep 2026 at 86.9% on time and its weakest Jan–Mar 2026 at 62.5%, a swing of 24 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 flights80.0%
- Oct–Dec 202591 flights69.2%
- Jan–Mar 202690 flights62.5%
- Apr–Jun 202691 flights80.2%
- Jul–Sep 202662 flights86.9%
Scale runs 55% to 90%.
By weekday, DL 2126 did best on Wednesday at 82.7% on time and worst on Sunday at 60.8%. 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 2126 runs when it is late
The 93 late arrivals split 31 under half an hour, 30 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early60 flights16.6%
- Within 15 min208 flights57.6%
- 15–29 min late31 flights8.6%
- 30–59 min late30 flights8.3%
- 1–2 hours late23 flights6.4%
- 2+ hours late9 flights2.5%
Scale runs 0% to 100%.
Share of 361 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 74 departures that left 15 minutes late or more, only 3 made it up before arrival. In the other direction, 22 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 BNA.
The worst days
Worst days for DL 2126
The latest arrival of the period was on 15 March 2026, 4 hours 36 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across March, January, July, May and December, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 March 2026 | 4 hours 36 minutes | National Airspace System |
| 26 January 2026 | 3 hours 51 minutes | Late-arriving aircraft |
| 28 July 2026 | 3 hours 35 minutes | Carrier |
| 22 May 2026 | 2 hours 33 minutes | Carrier |
| 28 December 2025 | 2 hours 28 minutes | Late-arriving aircraft |
Delay causes
Why DL 2126 runs late
Carrier accounts for 46% of the 5,360 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Carrier
- 28%National Airspace System
- 25%Late-arriving aircraft
- 1%Extreme weather
The largest share of delay minutes, 46%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,481 of the 5,360 delay minutes reported here. The split is drawn from 5,360 delay minutes reported on DL 2126.
Cancellations are rare at 0.82%, 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
8.9% 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.
Every one of the 364 flights under DL 2126 in the data flew DTW to BNA. 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. 364 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 2126
For a booking, read DL 2126 as 74.2% on time with 0.82% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- DTW to BNA, every carrier and departure
- BNA to DTW, the return direction
- Delta Air Lines 2682 on the same route88.0%
- Delta Air Lines 2316 on the same route69.4%
- Delta Air Lines 1557 on the same route88.5%
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Nashville International (BNA) 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
- Connecting flights: how much buffer the data says you need
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.