Flight number record
DL 2305
Delta Air Lines · Boston to Dallas-Fort Worth
- Route
- BOS → DFW
- Departs
- 18:20
- Flights
- 321
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2305, check with Delta Air Lines.
DL 2305 draws a C. About one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 321 flights, with a median arrival 1 minute early.
The national on-time rate over the same period is 77.3%, so DL 2305 runs 11 points behind the country as a whole. Across a thousand flights that is about 108 extra late arrivals.
Key figures
On time
66.5%
Arrivals under 15 minutes late, of 310 completed flights
Avg delay
84 min
Across delayed arrivals only, not all flights
Cancelled
2.49%
National rate is 1.89%
1 hour+ late
19.7%
National rate is 8.3%
These figures cover 321 flights between September 2025 and August 2026. Beyond the headline rate, 19.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 321 flights.
- Departs 18:2091 flights28.3%
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 18:20 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 2305 runs level with that at 66.5%. 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 2305 next to BOS to DFW
Every carrier on BOS to DFW combined arrived on time 77.4% of the time across 3,692 flights, so DL 2305 is 11 points behind it. Delta flew 868 flights on the same city pair under all its flight numbers, including this one, and those ran 72.7% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 15 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2305thin sample | 321 | 66.5% | 84 min | 2.49% | C |
| All Delta Air Lines on BOS–DFW | 868 | 72.7% | 77 min | 2.19% | C |
| All carriers on BOS–DFW | 3,692 | 77.4% | 88 min | 3.09% | B− |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | 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 Oct–Dec 2025 at 55.6%, a swing of 28 points on roughly 80 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 202526 flights—
- Oct–Dec 202563 flights55.6%
- Jan–Mar 202679 flights83.6%
- Apr–Jun 202691 flights64.0%
- Jul–Sep 202662 flights73.3%
Scale runs 45% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, DL 2305 did best on Tuesday at 79.5% on time and worst on Sunday at 51.1%. Each day rests on about 46 flights, so a gap of 28 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2305 runs when it is late
DL 2305 often beats the schedule: 98 of 310 completed flights, 32%, arrived 15 minutes or more early. When DL 2305 is late it tends to be very late: 61 of its 104 late arrivals were an hour or more behind, and 18 were two hours or more.
- 15+ min early98 flights31.6%
- Within 15 min108 flights34.8%
- 15–29 min late28 flights9.0%
- 30–59 min late15 flights4.8%
- 1–2 hours late43 flights13.9%
- 2+ hours late18 flights5.8%
Scale runs 0% to 100%.
Share of 310 completed flights by arrival against schedule.
35 of 124 late departures made up the time and arrived on time, 28% of them. 15 flights left on time and still arrived late.
The worst days
Worst days for DL 2305
The latest arrival of the period was on 19 September 2025, 12 hours 23 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 September 2025 | 12 hours 23 minutes | Carrier |
| 11 March 2026 | 4 hours 37 minutes | Late-arriving aircraft |
| 22 July 2026 | 4 hours 37 minutes | Carrier |
| 13 October 2025 | 4 hours 2 minutes | Late-arriving aircraft |
| 16 April 2026 | 3 hours 40 minutes | Late-arriving aircraft |
Delay causes
Why DL 2305 runs late
Late-arriving aircraft accounts for 55% of the 8,753 delay minutes carriers reported here, and the remaining four split what is left.
- 55%Late-arriving aircraft
- 28%Carrier
- 16%National Airspace System
55% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 8,753 reported delay minutes here, that single category outweighs weather by 55 to one. The split is drawn from 8,753 delay minutes reported on DL 2305.
Cancellations sit at 2.49% against a national 1.89%, which is ordinary. Diversions add another 0.93%.
Connections and routes
What a delay on this flight costs
19.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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 321 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. 321 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. 19.7% 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 route90.8%
- Delta Air Lines 760 on the same route78.6%
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.