Flight number record

DL 1412

Delta Air Lines · San Francisco to Seattle

Route: SFO → SEA
Departs: 13:45
Flights: 346
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1412, check with Delta Air Lines.

DL 1412 lands a B, about a point worse than the national rate of 77.6%. About one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 346 flights, with a median arrival 6 minutes early.

On time

76.4%

Arrivals under 15 minutes late, of 339 completed flights

Avg delay

82 min

Across delayed arrivals only, not all flights

Cancelled

1.73%

National rate is 1.81%

1 hour+ late

11.2%

National rate is 8.1%

These figures cover 346 flights between July 2025 and June 2026. Beyond the headline rate, 11.2% 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 1412 flies

DL 1412 flies SFO to SEA without a single fixed slot. Its most common scheduled departure was 13:45, used on 130 of 346 flights, with 13:58 (39 flights) and 14:55 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:45130 flights37.6%
Departs 13:5839 flights11.3%
Departs 14:5536 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 13:45 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 1412 runs 2 points worse at 76.4%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 1412 next to SFO to SEA

Every carrier on SFO to SEA combined arrived on time 73.7% of the time across 6,770 flights, so DL 1412 is 3 points ahead of it. Delta flew 924 flights on the same city pair under all its flight numbers, including this one, and those ran 83.6% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 5 points.

DL 1412 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1412thin sample	346	76.4%	82 min	1.73%	B
All Delta Air Lines on SFO–SEA	924	83.6%	74 min	1.73%	B
All carriers on SFO–SEA	6,770	73.7%	56 min	1.18%	C
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1412 quarter by quarter

DL 1412 did not run the same all year. Its best quarter was Jan–Mar 2026 at 86.4% on time and its weakest Apr–Jun 2026 at 70.3%, a swing of 16 points on roughly 87 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 202592 flights72.5%
Oct–Dec 202577 flights77.6%
Jan–Mar 202686 flights86.4%
Apr–Jun 202691 flights70.3%

Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1412 did best on Monday at 83.7% on time and worst on Sunday at 65.3%. Each day rests on about 49 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1412 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 65% of the 6,523 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.

Late-arriving aircraft
65%
Carrier
28%
National Airspace System
7%

65% 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 6,523 reported delay minutes here, that single category outweighs weather by 65 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 6,523 delay minutes reported on DL 1412.

Cancellations sit at 1.73% against a national 1.81%, which is ordinary. Diversions add another 0.29%.

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. 11.2% 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.

The 679 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

DL 1412 is not only a SFO to SEA flight. It also flew SEA to SFO (346 flights, 66.3% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 346 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.

Other routes flown as DL 1412
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SEA to SFOthin sample	346	66.3%	61 min	1.45%	C

What to do with this

Booking DL 1412

For a booking, read DL 1412 as 76.4% on time with 1.73% cancelled over 346 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