Flight number record

DL 848

Delta Air Lines · Seattle to Austin

Route: SEA → AUS
Departs: 17:45
Flights: 297
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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, 3 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 297 flights, with a median arrival 4 minutes early.

On time

74.9%

Arrivals under 15 minutes late, of 295 completed flights

Avg delay

70 min

Across delayed arrivals only, not all flights

Cancelled

0.67%

National rate is 1.81%

1 hour+ late

10.8%

National rate is 8.1%

These figures cover 297 flights between July 2025 and June 2026. Beyond the headline rate, 10.8% 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 848 flies

DL 848 flies SEA to AUS without a single fixed slot. Its most common scheduled departure was 17:45, used on 178 of 297 flights, with 17:50 (75 flights) and 17:48 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:45178 flights59.9%
Departs 17:5075 flights25.3%
Departs 17:4831 flights10.4%

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 17:45 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and DL 848 runs 7 points better at 74.9%. 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 848 next to SEA to AUS

Every carrier on SEA to AUS combined arrived on time 79.1% of the time across 2,059 flights, so DL 848 is 4 points behind it. Delta flew 936 flights on the same city pair under all its flight numbers, including this one, and those ran 81.0% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 7 points.

DL 848 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 848thin sample	297	74.9%	70 min	0.67%	C+
All Delta Air Lines on SEA–AUS	936	81.0%	72 min	1.28%	B
All carriers on SEA–AUS	2,059	79.1%	57 min	0.97%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	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 74 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 202574 flights75.7%
Oct–Dec 202581 flights81.0%
Jan–Mar 202651 flights80.4%
Apr–Jun 202691 flights65.9%

Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, DL 848 did best on Monday at 80.4% on time and worst on Thursday at 62.8%. Each day rests on about 42 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 848 runs late

One category carries most of the weight here. Carrier accounts for 46% of the 5,179 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.

Carrier
46%
Late-arriving aircraft
40%
National Airspace System
14%
Extreme weather
0%

40% 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 5,179 reported delay minutes here, that single category outweighs weather by 40 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 5,179 delay minutes reported on DL 848.

Cancellations are rare at 0.67%, below the national 1.81% 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.8% 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 1,770 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. 297 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, read DL 848 as 74.9% on time with 0.67% cancelled over 297 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

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.

Key figures