Flight number record

DL 804

Delta Air Lines · Dallas-Fort Worth to Seattle

Route: DFW → SEA
Departs: 07:10
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 804, check with Delta Air Lines.

DL 804 earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 365 flights, with a median arrival 7 minutes early.

Set against the rest of the country, DL 804's record is 7 points better than the US average of 77.6%. That gap is worth roughly 74 fewer late arrivals for every thousand flights.

On time

85.0%

Arrivals under 15 minutes late, of 354 completed flights

Avg delay

74 min

Across delayed arrivals only, not all flights

Cancelled

2.47%

National rate is 1.81%

1 hour+ late

4.2%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 7 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 804 flies

DL 804 flies DFW to SEA without a single fixed slot. Its most common scheduled departure was 07:10, used on 110 of 365 flights, with 06:20 (84 flights) and 06:30 (55 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:10110 flights30.1%
Departs 06:2084 flights23.0%
Departs 06:3055 flights15.1%

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 07:10 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and DL 804 runs 4 points worse at 85.0%. 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 804 next to DFW to SEA

Every carrier on DFW to SEA combined arrived on time 69.5% of the time across 5,232 flights, so DL 804 is 16 points ahead of it. Delta flew 712 flights on the same city pair under all its flight numbers, including this one, and those ran 78.9% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 3 points.

DL 804 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 804	365	85.0%	74 min	2.47%	A
All Delta Air Lines on DFW–SEA	712	78.9%	88 min	1.69%	B
All carriers on DFW–SEA	5,232	69.5%	64 min	2.12%	C
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 804 quarter by quarter

Quarter by quarter DL 804 held fairly steady: 90.0% in Jul–Sep 2025, 84.4% in Oct–Dec 2025, 81.9% in Jan–Mar 2026 and 83.5% in Apr–Jun 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights90.0%
Oct–Dec 202592 flights84.4%
Jan–Mar 202690 flights81.9%
Apr–Jun 202691 flights83.5%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 804 ranged from 82.0% on Saturday to 87.8% on Monday. With about 52 flights behind each day, a spread of 6 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why DL 804 runs late

One category carries most of the weight here. Carrier accounts for 44% of the 3,901 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
44%
National Airspace System
25%
Late-arriving aircraft
16%
Extreme weather
15%

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 3,901 delay minutes reported on DL 804.

Cancellations sit at 2.47% against a national 1.81%, which is ordinary. Diversions add another 0.55%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.2% 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 1,660 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 365 flights under DL 804 in the data flew DFW to SEA. 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. 365 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 804

For a booking, read DL 804 as 85.0% on time with 2.47% cancelled over 365 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