Flight number record

DL 2715

Delta Air Lines · Detroit to Baltimore

Route: DTW → BWI
Departs: 21:45
Flights: 363
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 363 flights, with a median arrival 8 minutes early.

On time

78.2%

Arrivals under 15 minutes late, of 353 completed flights

Avg delay

80 min

Across delayed arrivals only, not all flights

Cancelled

2.75%

National rate is 1.81%

1 hour+ late

9.1%

National rate is 8.1%

These figures cover 363 flights between July 2025 and June 2026. Beyond the headline rate, 9.1% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When DL 2715 flies

DL 2715 flies DTW to BWI without a single fixed slot. Its most common scheduled departure was 21:45, used on 101 of 363 flights, with 21:30 (95 flights) and 21:29 (39 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:45101 flights27.8%
Departs 21:3095 flights26.2%
Departs 21:2939 flights10.7%

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 21:45 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 2715 runs 8 points better at 78.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

DL 2715 next to DTW to BWI

Every carrier on DTW to BWI combined arrived on time 80.9% of the time across 2,261 flights, so DL 2715 is 3 points behind it. Delta flew 1,204 flights on the same city pair under all its flight numbers, including this one, and those ran 81.9% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 3 points.

DL 2715 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 2715thin sample	363	78.2%	80 min	2.75%	B
All Delta Air Lines on DTW–BWI	1,204	81.9%	73 min	1.50%	B
All carriers on DTW–BWI	2,261	80.9%	65 min	1.33%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 2715 quarter by quarter

Quarter by quarter DL 2715 held fairly steady: 80.2% in Jul–Sep 2025, 76.1% in Oct–Dec 2025, 77.3% in Jan–Mar 2026 and 79.1% in Apr–Jun 2026. A spread of 4 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights80.2%
Oct–Dec 202590 flights76.1%
Jan–Mar 202690 flights77.3%
Apr–Jun 202691 flights79.1%

Scale runs 70% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, DL 2715 did best on Tuesday at 90.4% on time and worst on Friday at 72.0%. Each day rests on about 52 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 2715 runs late

One category carries most of the weight here. Carrier accounts for 58% of the 6,155 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.

Carrier
58%
Late-arriving aircraft
28%
National Airspace System
11%
Extreme weather
3%

The largest share of delay minutes, 58%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 3,583 of the 6,155 delay minutes reported here. The split is drawn from 6,155 delay minutes reported on DL 2715.

Cancellations run at 2.75%, against 1.81% 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.1% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

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 a little over an hour, but a cancellation costs the day, so leave a later option open.

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