Flight number record
DL 2648
Delta Air Lines · Detroit to Boston
- Route
- DTW → BOS
- Departs
- 10:05
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2648, check with Delta Air Lines.
DL 2648 lands a B, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 364 flights, with a median arrival 9 minutes early.
Set against the rest of the country, DL 2648's record is 5 points better than the US average of 77.3%. That gap is worth roughly 54 fewer late arrivals for every thousand flights.
Key figures
On time
82.7%
Arrivals under 15 minutes late, of 358 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
1.37%
National rate is 1.89%
1 hour+ late
7.5%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. The median arrival is 9 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 2648 flies
DL 2648 flies DTW to BOS without a single fixed slot. Its most common scheduled departure was 10:05, used on 137 of 364 flights, with 10:00 (84 flights) and 10:10 (70 flights) next.
- Departs 10:05137 flights37.6%
- Departs 10:0084 flights23.1%
- Departs 10:1070 flights19.2%
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 10:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and DL 2648 runs level with that at 82.7%. 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 2648 next to DTW to BOS
Every carrier on DTW to BOS combined arrived on time 73.6% of the time across 2,572 flights, so DL 2648 is 9 points ahead of it. Delta flew 1,716 flights on the same city pair under all its flight numbers, including this one, and those ran 74.6% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2648thin sample | 364 | 82.7% | 58 min | 1.37% | B |
| All Delta Air Lines on DTW–BOS | 1,716 | 74.6% | 65 min | 1.98% | C |
| All carriers on DTW–BOS | 2,572 | 73.6% | 71 min | 2.72% | C |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2648 quarter by quarter
Quarter by quarter DL 2648 held fairly steady: 83.3% in Jul–Sep 2025, 80.2% in Oct–Dec 2025, 82.8% in Jan–Mar 2026, 83.3% in Apr–Jun 2026 and 85.0% in Jul–Sep 2026. A spread of 5 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 202591 flights80.2%
- Jan–Mar 202690 flights82.8%
- Apr–Jun 202691 flights83.3%
- Jul–Sep 202662 flights85.0%
Scale runs 70% to 90%.
By weekday, DL 2648 did best on Wednesday at 90.4% on time and worst on Monday at 68.6%. 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 2648 runs when it is late
DL 2648 often beats the schedule: 121 of 358 completed flights, 34%, arrived 15 minutes or more early. The 62 late arrivals split 16 under half an hour, 19 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early121 flights33.8%
- Within 15 min175 flights48.9%
- 15–29 min late16 flights4.5%
- 30–59 min late19 flights5.3%
- 1–2 hours late22 flights6.1%
- 2+ hours late5 flights1.4%
Scale runs 0% to 100%.
Share of 358 completed flights by arrival against schedule.
7 of 52 late departures made up the time and arrived on time, 13% of them. 17 flights left on time and still arrived late.
The worst days
Worst days for DL 2648
The latest arrival of the period was on 18 September 2025, 2 hours 47 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 |
|---|---|---|
| 18 September 2025 | 2 hours 47 minutes | Carrier |
| 14 October 2025 | 2 hours 17 minutes | National Airspace System |
| 3 May 2026 | 2 hours 17 minutes | Carrier |
| 24 February 2026 | 2 hours 11 minutes | Extreme weather |
| 1 December 2025 | 2 hours 10 minutes | Carrier |
Delay causes
Why DL 2648 runs late
Carrier accounts for 62% of the 3,583 delay minutes carriers reported here, and the remaining four split what is left.
- 62%Carrier
- 28%National Airspace System
- 6%Late-arriving aircraft
- 4%Extreme weather
The largest share of delay minutes, 62%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,218 of the 3,583 delay minutes reported here. The split is drawn from 3,583 delay minutes reported on DL 2648.
Cancellations sit at 1.37% against a national 1.89%, which is ordinary. Diversions add another 0.27%.
Connections and routes
What a delay on this flight costs
7.5% 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 632 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 364 flights under DL 2648 in the data flew DTW to BOS. 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 2648
For a booking, read DL 2648 as 82.7% on time with 1.37% 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 BOS, every carrier and departure
- BOS to DTW, the return direction
- Delta Air Lines 1163 on the same route91.0%
- Delta Air Lines 1187 on the same route70.3%
- Delta Air Lines 1171 on the same route68.2%
- Delta Air Lines 1707 on the same route55.5%
- Detroit Metropolitan Wayne County (DTW) delay statistics
- Boston Logan International (BOS) 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.