Flight number record
DL 2715
Delta Air Lines · Detroit to Baltimore
- Route
- DTW → BWI
- Departs
- 21:30
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2715, check with Delta Air Lines.
DL 2715 lands a B, level with the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 363 flights, with a median arrival 8 minutes early.
Key figures
On time
77.9%
Arrivals under 15 minutes late, of 353 completed flights
Avg delay
86 min
Across delayed arrivals only, not all flights
Cancelled
2.75%
National rate is 1.89%
1 hour+ late
8.8%
National rate is 8.3%
These figures cover 363 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 2715 flies
DL 2715 flies DTW to BWI without a single fixed slot. Its most common scheduled departure was 21:30, used on 94 of 363 flights, with 21:45 (68 flights) and 21:40 (46 flights) next.
- Departs 21:3094 flights25.9%
- Departs 21:4568 flights18.7%
- Departs 21:4046 flights12.7%
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 21:30 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and DL 2715 runs 8 points better at 77.9%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
DL 2715 next to DTW to BWI
Every carrier on DTW to BWI combined arrived on time 80.7% of the time across 2,230 flights, so DL 2715 is 3 points behind it. Delta flew 1,224 flights on the same city pair under all its flight numbers, including this one, and those ran 82.0% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2715thin sample | 363 | 77.9% | 86 min | 2.75% | B |
| All Delta Air Lines on DTW–BWI | 1,224 | 82.0% | 69 min | 1.63% | B |
| All carriers on DTW–BWI | 2,230 | 80.7% | 62 min | 1.43% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2715 quarter by quarter
Quarter by quarter DL 2715 held fairly steady: 83.3% in Jul–Sep 2025, 76.1% in Oct–Dec 2025, 77.3% in Jan–Mar 2026, 79.1% in Apr–Jun 2026 and 77.0% in Jul–Sep 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights83.3%
- Oct–Dec 202590 flights76.1%
- Jan–Mar 202690 flights77.3%
- Apr–Jun 202691 flights79.1%
- Jul–Sep 202662 flights77.0%
Scale runs 70% to 90%.
By weekday, DL 2715 did best on Tuesday at 86.3% on time and worst on Sunday at 66.7%. Each day rests on about 52 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2715 runs when it is late
DL 2715 often beats the schedule: 99 of 353 completed flights, 28%, arrived 15 minutes or more early. The 78 late arrivals split 24 under half an hour, 23 between 30 and 60 minutes, and 31 an hour or more.
- 15+ min early99 flights28.0%
- Within 15 min176 flights49.9%
- 15–29 min late24 flights6.8%
- 30–59 min late23 flights6.5%
- 1–2 hours late15 flights4.2%
- 2+ hours late16 flights4.5%
Scale runs 0% to 100%.
Share of 353 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 77 departures that left 15 minutes late or more, only 7 made it up before arrival. 8 flights left on time and still arrived late.
The worst days
Worst days for DL 2715
The latest arrival of the period was on 31 December 2025, 12 hours 25 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 31 December 2025 | 12 hours 25 minutes | Carrier |
| 12 August 2026 | 10 hours 23 minutes | National Airspace System |
| 29 May 2026 | 9 hours 40 minutes | Carrier |
| 26 March 2026 | 3 hours 32 minutes | Late-arriving aircraft |
| 24 January 2026 | 2 hours 53 minutes | Carrier |
Delay causes
Why DL 2715 runs late
Carrier accounts for 53% of the 6,693 delay minutes carriers reported here, and the remaining four split what is left.
- 53%Carrier
- 24%Late-arriving aircraft
- 21%National Airspace System
- 2%Extreme weather
The largest share of delay minutes, 53%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,540 of the 6,693 delay minutes reported here. The split is drawn from 6,693 delay minutes reported on DL 2715.
Cancellations run at 2.75%, against 1.89% nationally. That is roughly one flight in 40 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
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 an hour and a half, which a normal layover absorbs.
Every one of the 363 flights under DL 2715 in the data flew DTW to BWI. 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. 363 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 2715
For a booking, the cancellation rate is the figure to plan around on DL 2715: 2.75% of its 363 scheduled flights did not operate. A late arrival costs an hour and a half, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- DTW to BWI, every carrier and departure
- BWI to DTW, the return direction
- Delta Air Lines 2480 on the same route80.0%
- Delta Air Lines 1546 on the same route85.9%
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Baltimore/Washington International Thurgood Marshall (BWI) 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
- What a cancellation rate actually tells you (and what it hides)
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.