Flight number record

DL 764

Delta Air Lines · San Diego to Detroit

Route: SAN → DTW
Departs: 22:15
Flights: 346
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 764, check with Delta Air Lines.

DL 764 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 12 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 35 minutes. That rests on 346 flights, with a median arrival 11 minutes early.

Set against the rest of the country, DL 764's record is 12 points better than the US average of 77.6%. That gap is worth roughly 124 fewer late arrivals for every thousand flights.

On time

90.0%

Arrivals under 15 minutes late, of 341 completed flights

Avg delay

33 min

Across delayed arrivals only, not all flights

Cancelled

1.45%

National rate is 1.81%

1 hour+ late

0.6%

National rate is 8.1%

These figures cover 346 flights between July 2025 and June 2026. The median arrival is 11 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 764 flies

DL 764 flies SAN to DTW without a single fixed slot. Its most common scheduled departure was 22:15, used on 107 of 346 flights, with 22:10 (83 flights) and 22:00 (79 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 22:15107 flights30.9%
Departs 22:1083 flights24.0%
Departs 22:0079 flights22.8%

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 22:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 764 runs 20 points better at 90.0%. 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 764 next to SAN to DTW

Every carrier on SAN to DTW combined arrived on time 85.8% of the time across 1,314 flights, so DL 764 is 4 points ahead of it. Delta flew 1,260 flights on the same city pair under all its flight numbers, including this one, and those ran 86.4% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 8 points.

DL 764 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 764thin sample	346	90.0%	33 min	1.45%	A
All Delta Air Lines on SAN–DTW	1,260	86.4%	50 min	1.03%	A
All carriers on SAN–DTW	1,314	85.8%	50 min	1.07%	A
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 764 quarter by quarter

Quarter by quarter DL 764 held fairly steady: 90.6% in Jul–Sep 2025, 94.5% in Oct–Dec 2025, 85.4% in Jan–Mar 2026 and 89.5% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202587 flights90.6%
Oct–Dec 202592 flights94.5%
Jan–Mar 202690 flights85.4%
Apr–Jun 202677 flights89.5%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, DL 764 did best on Sunday at 96.0% on time and worst on Thursday at 82.4%. Each day rests on about 49 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 764 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 1,127 reported delay minutes.

Carrier
39%
National Airspace System
32%
Late-arriving aircraft
29%
Extreme weather
1%

The largest share of delay minutes, 39%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 435 of the 1,127 delay minutes reported here. The split is drawn from 1,127 delay minutes reported on DL 764.

Cancellations sit at 1.45% 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 0.6% 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 1,956 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 346 flights under DL 764 in the data flew SAN to DTW. 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. 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.

What to do with this

Booking DL 764

For a booking, DL 764 has one of the better records a US domestic flight can show: 90.0% on time and 1.45% 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