Flight number record
DL 848
Delta Air Lines · Seattle to Austin
- Route
- SEA → AUS
- Departs
- 17:45
- Flights
- 311
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 848, check with Delta Air Lines.
DL 848 sits in the middle of the pack with a C+. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 311 flights, with a median arrival 2 minutes early.
Key figures
On time
73.5%
Arrivals under 15 minutes late, of 309 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
0.64%
National rate is 1.89%
1 hour+ late
10.4%
National rate is 8.3%
These figures cover 311 flights between September 2025 and August 2026. Beyond the headline rate, 10.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When DL 848 flies
DL 848 flies SEA to AUS without a single fixed slot. Its most common scheduled departure was 17:45, used on 130 of 311 flights, with 17:50 (108 flights) next.
- Departs 17:45130 flights41.8%
- Departs 17:50108 flights34.7%
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 17:45 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and DL 848 runs 6 points better at 73.5%. 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 848 next to SEA to AUS
Every carrier on SEA to AUS combined arrived on time 78.5% of the time across 2,090 flights, so DL 848 is 5 points behind it. Delta flew 950 flights on the same city pair under all its flight numbers, including this one, and those ran 80.1% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 848thin sample | 311 | 73.5% | 63 min | 0.64% | C+ |
| All Delta Air Lines on SEA–AUS | 950 | 80.1% | 67 min | 1.05% | B |
| All carriers on SEA–AUS | 2,090 | 78.5% | 55 min | 0.81% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 848 quarter by quarter
DL 848 did not run the same all year. Its best quarter was Oct–Dec 2025 at 81.0% on time and its weakest Apr–Jun 2026 at 65.9%, a swing of 15 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 202526 flights—
- Oct–Dec 202581 flights81.0%
- Jan–Mar 202651 flights80.4%
- Apr–Jun 202691 flights65.9%
- Jul–Sep 202662 flights67.7%
Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, DL 848 did best on Saturday at 86.8% on time and worst on Thursday at 65.9%. Each day rests on about 44 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 848 runs when it is late
DL 848 often beats the schedule: 80 of 309 completed flights, 26%, arrived 15 minutes or more early. The 82 late arrivals split 31 under half an hour, 19 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early80 flights25.9%
- Within 15 min147 flights47.6%
- 15–29 min late31 flights10.0%
- 30–59 min late19 flights6.1%
- 1–2 hours late20 flights6.5%
- 2+ hours late12 flights3.9%
Scale runs 0% to 100%.
Share of 309 completed flights by arrival against schedule.
12 of 70 late departures made up the time and arrived on time, 17% of them. In the other direction, 24 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 848
The latest arrival of the period was on 13 March 2026, 5 hours 18 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 March 2026 | 5 hours 18 minutes | Late-arriving aircraft |
| 2 April 2026 | 3 hours 32 minutes | Carrier |
| 23 September 2025 | 3 hours 3 minutes | Carrier |
| 28 October 2025 | 2 hours 43 minutes | Carrier |
| 22 April 2026 | 2 hours 42 minutes | Carrier |
Delay causes
Why DL 848 runs late
Carrier accounts for 46% of the 5,164 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Carrier
- 38%Late-arriving aircraft
- 16%National Airspace System
- 0%Extreme weather
38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,164 reported delay minutes here, that single category outweighs weather by 38 to one. The split is drawn from 5,164 delay minutes reported on DL 848.
Cancellations are rare at 0.64%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
10.4% 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 1,770 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 one other city pair in the data, including DTW to BUF (38), but none flew often enough under DL 848 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SEA to AUS only.
One caution: this is a thin sample. 311 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 848
For a booking, DL 848 is one of the weaker ways to fly SEA to AUS: 5 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- SEA to AUS, every carrier and departure
- AUS to SEA, the return direction
- Delta Air Lines 831 on the same route78.7%
- Alaska Airlines 502 on the same route83.1%
- Alaska Airlines 352 on the same route84.3%
- Delta Air Lines 739 on the same route89.2%
- Alaska Airlines 372 on the same route77.6%
- Seattle-Tacoma International (SEA) 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.