Flight number record
DL 1297
Delta Air Lines · Boston to Austin
- Route
- BOS → AUS
- Departs
- 13:25
- Flights
- 273
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1297, check with Delta Air Lines.
DL 1297 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 273 flights, with a median arrival 8 minutes early.
Key figures
On time
74.3%
Arrivals under 15 minutes late, of 268 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
1.47%
National rate is 1.89%
1 hour+ late
10.1%
National rate is 8.3%
These figures cover 273 flights between September 2025 and August 2026. Beyond the headline rate, 10.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 1297 flies
DL 1297 flies BOS to AUS without a single fixed slot. Its most common scheduled departure was 13:25, used on 91 of 273 flights, with 13:30 (57 flights) and 13:10 (31 flights) next.
- Departs 13:2591 flights33.3%
- Departs 13:3057 flights20.9%
- Departs 13:1031 flights11.4%
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 13:25 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 1297 runs 4 points worse at 74.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 1297 next to BOS to AUS
Every carrier on BOS to AUS combined arrived on time 72.6% of the time across 1,713 flights, so DL 1297 is 2 points ahead of it. Delta flew 1,001 flights on the same city pair under all its flight numbers, including this one, and those ran 73.7% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1297thin sample | 273 | 74.3% | 73 min | 1.47% | C |
| All Delta Air Lines on BOS–AUS | 1,001 | 73.7% | 87 min | 2.60% | C |
| All carriers on BOS–AUS | 1,713 | 72.6% | 74 min | 2.39% | C |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1297 quarter by quarter
Quarter by quarter DL 1297 held fairly steady: 76.7% in Oct–Dec 2025, 76.3% in Jan–Mar 2026, 74.0% in Apr–Jun 2026 and 67.8% in Jul–Sep 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202525 flights—
- Oct–Dec 202573 flights76.7%
- Jan–Mar 202641 flights76.3%
- Apr–Jun 202673 flights74.0%
- Jul–Sep 202661 flights67.8%
Scale runs 60% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, DL 1297 did best on Wednesday at 86.7% on time and worst on Sunday at 65.7%. Each day rests on about 39 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1297 runs when it is late
DL 1297 often beats the schedule: 95 of 268 completed flights, 35%, arrived 15 minutes or more early. The 69 late arrivals split 24 under half an hour, 18 between 30 and 60 minutes, and 27 an hour or more.
- 15+ min early95 flights35.4%
- Within 15 min104 flights38.8%
- 15–29 min late24 flights9.0%
- 30–59 min late18 flights6.7%
- 1–2 hours late15 flights5.6%
- 2+ hours late12 flights4.5%
Scale runs 0% to 100%.
Share of 268 completed flights by arrival against schedule.
7 of 47 late departures made up the time and arrived on time, 15% of them. In the other direction, 29 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at AUS.
The worst days
Worst days for DL 1297
The latest arrival of the period was on 19 January 2026, 8 hours 19 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 January 2026 | 8 hours 19 minutes | Late-arriving aircraft |
| 21 July 2026 | 4 hours 59 minutes | Carrier |
| 28 September 2025 | 4 hours 22 minutes | Late-arriving aircraft |
| 14 October 2025 | 3 hours 38 minutes | Late-arriving aircraft |
| 11 November 2025 | 3 hours 31 minutes | Late-arriving aircraft |
Delay causes
Why DL 1297 runs late
Late-arriving aircraft accounts for 45% of the 5,068 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Late-arriving aircraft
- 28%National Airspace System
- 26%Carrier
- 1%Extreme weather
45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,068 reported delay minutes here, that single category outweighs weather by 34 to one. The split is drawn from 5,068 delay minutes reported on DL 1297.
Cancellations sit at 1.47% against a national 1.89%, which is ordinary. Diversions add another 0.37%.
Connections and routes
What a delay on this flight costs
10.1% 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 1,698 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.
The same number turns up on four other city pairs in the data, including AUS to BOS (125), ATL to MYR (15) and MSY to SLC (6), but none flew often enough under DL 1297 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BOS to AUS only.
One caution: this is a thin sample. 273 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 1297
For a booking, read DL 1297 as 74.3% on time with 1.47% cancelled over 273 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- BOS to AUS, every carrier and departure
- AUS to BOS, the return direction
- Delta Air Lines 1410 on the same route83.6%
- Delta Air Lines 1677 on the same route61.7%
- Boston Logan International (BOS) delay statistics
- Austin-Bergstrom International (AUS) 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.