Flight number record

DL 780

Delta Air Lines · Austin to Seattle

Route: AUS → SEA
Departs: 06:00
Flights: 325
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 780, check with Delta Air Lines.

DL 780 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 14 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 2.7 hours. That rests on 325 flights, with a median arrival 14 minutes early.

Set against the rest of the country, DL 780's record is 14 points better than the US average of 77.6%. That gap is worth roughly 143 fewer late arrivals for every thousand flights.

On time

91.9%

Arrivals under 15 minutes late, of 322 completed flights

Avg delay

160 min

Across delayed arrivals only, not all flights

Cancelled

0.92%

National rate is 1.81%

1 hour+ late

4.0%

National rate is 8.1%

These figures cover 325 flights between July 2025 and June 2026. The median arrival is 14 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Schedule

When DL 780 flies

DL 780 flies AUS to SEA without a single fixed slot. Its most common scheduled departure was 06:00, used on 79 of 325 flights, with 06:25 (66 flights) and 06:05 (56 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:0079 flights24.3%
Departs 06:2566 flights20.3%
Departs 06:0556 flights17.2%

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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 780 runs 3 points better at 91.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

DL 780 next to AUS to SEA

Every carrier on AUS to SEA combined arrived on time 82.8% of the time across 2,058 flights, so DL 780 is 9 points ahead of it. Delta flew 935 flights on the same city pair under all its flight numbers, including this one, and those ran 84.9% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 10 points.

DL 780 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 780thin sample	325	91.9%	160 min	0.92%	A+
All Delta Air Lines on AUS–SEA	935	84.9%	94 min	1.07%	B
All carriers on AUS–SEA	2,058	82.8%	69 min	1.07%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 780 quarter by quarter

Quarter by quarter DL 780 held fairly steady: 92.4% in Jul–Sep 2025, 90.9% in Oct–Dec 2025, 94.1% in Jan–Mar 2026 and 91.2% in Apr–Jun 2026. A spread of 3 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights92.4%
Oct–Dec 202591 flights90.9%
Jan–Mar 202651 flights94.1%
Apr–Jun 202691 flights91.2%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 780 ranged from 87.0% on Sunday to 95.7% on Wednesday. With about 46 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 780 runs late

One category carries most of the weight here. Carrier accounts for 76% of the 4,156 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
76%
Extreme weather
15%
Late-arriving aircraft
5%
National Airspace System
4%

Extreme weather accounts for 15% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.4 times the usual weather exposure. The split is drawn from 4,156 delay minutes reported on DL 780.

Cancellations sit at 0.92% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.0% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

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 RSW to DTW (38), but none flew often enough under DL 780 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to AUS to SEA only.

One caution: this is a thin sample. 325 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 780

For a booking, DL 780 has one of the better records a US domestic flight can show: 91.9% on time and 0.92% cancelled. That is a base rate, not a promise about any single 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