Flight number record
DL 2305
Delta Air Lines · Boston to Dallas-Fort Worth
- Route
- BOS → DFW
- Departs
- 18:20
- Flights
- 310
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s DL 2305, check with Delta Air Lines.
DL 2305 draws a D. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 310 flights, with a median arrival 1 minute early.
The national on-time rate over the same period is 77.6%, so DL 2305 runs 14 points behind the country as a whole. Across a thousand flights that is about 139 extra late arrivals.
Key figures
On time
63.7%
Arrivals under 15 minutes late, of 300 completed flights
Avg delay
82 min
Across delayed arrivals only, not all flights
Cancelled
2.26%
National rate is 1.81%
1 hour+ late
19.3%
National rate is 8.1%
These figures cover 310 flights between July 2025 and June 2026. Beyond the headline rate, 19.3% 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 2305 flies
DL 2305 flies BOS to DFW without a single fixed slot. Its most common scheduled departure was 18:20, used on 91 of 310 flights, with 19:30 (42 flights) and 19:05 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 18:2091 flights29.4%
- Departs 19:3042 flights13.5%
- Departs 19:0531 flights10.0%
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 18:20 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and DL 2305 runs 5 points worse at 63.7%. 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 2305 next to BOS to DFW
Every carrier on BOS to DFW combined arrived on time 76.1% of the time across 3,740 flights, so DL 2305 is 12 points behind it. Delta flew 861 flights on the same city pair under all its flight numbers, including this one, and those ran 70.0% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 18 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2305thin sample | 310 | 63.7% | 82 min | 2.26% | D |
| All Delta Air Lines on BOS–DFW | 861 | 70.0% | 79 min | 2.21% | C |
| All carriers on BOS–DFW | 3,740 | 76.1% | 84 min | 3.16% | B− |
| Delta Air Lines, whole network | 1,038,570 | 81.6% | 71 min | 1.62% | B |
Across the year
DL 2305 quarter by quarter
DL 2305 did not run the same all year. Its best quarter was Jan–Mar 2026 at 83.6% on time and its weakest Jul–Sep 2025 at 50.7%, a swing of 33 points on roughly 78 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 202577 flights50.7%
- Oct–Dec 202563 flights55.6%
- Jan–Mar 202679 flights83.6%
- Apr–Jun 202691 flights64.0%
Scale runs 40% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, DL 2305 did best on Tuesday at 71.7% on time and worst on Sunday at 47.7%. Each day rests on about 44 flights, so a gap of 24 points is worth noticing but could still narrow in another year.
Delay causes
Why DL 2305 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 53% of the 8,922 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.
- 53%Late-arriving aircraft
- 29%Carrier
- 18%National Airspace System
53% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 8,922 reported delay minutes here, that single category outweighs weather by 53 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 8,922 delay minutes reported on DL 2305.
Cancellations sit at 2.26% against a national 1.81%, which is ordinary. Diversions add another 0.97%.
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. 19.3% 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.
At 1,562 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 310 flights under DL 2305 in the data flew BOS to DFW. 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. 310 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 2305
For a booking, DL 2305 is a flight to put a long connection behind. 19.3% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- BOS to DFW, every carrier and departure
- DFW to BOS, the return direction
- American Airlines 2527 on the same route91.0%
- Delta Air Lines 760 on the same route78.7%
- Boston Logan International (BOS) delay statistics
- Dallas/Fort Worth International (DFW) 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
- Why the first flight of the morning is statistically safest
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.