Flight number record

DL 700

Delta Air Lines · Detroit to San Diego

Route: DTW → SAN
Departs: 20:55
Flights: 271
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 700, check with Delta Air Lines.

DL 700 draws a D. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 271 flights, with a median arrival 7 minutes late.

The national on-time rate over the same period is 77.6%, so DL 700 runs 15 points behind the country as a whole. Across a thousand flights that is about 152 extra late arrivals.

On time

62.4%

Arrivals under 15 minutes late, of 266 completed flights

Avg delay

69 min

Across delayed arrivals only, not all flights

Cancelled

1.11%

National rate is 1.81%

1 hour+ late

12.4%

National rate is 8.1%

These figures cover 271 flights between July 2025 and June 2026. Beyond the headline rate, 12.4% 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 700 flies

DL 700 flies DTW to SAN without a single fixed slot. Its most common scheduled departure was 20:55, used on 60 of 271 flights, with 20:05 (55 flights) and 20:25 (46 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 20:5560 flights22.1%
Departs 20:0555 flights20.3%
Departs 20:2546 flights17.0%

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 20:55 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 700 runs 8 points worse at 62.4%. 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 700 next to DTW to SAN

Every carrier on DTW to SAN combined arrived on time 75.4% of the time across 1,314 flights, so DL 700 is 13 points behind it. Delta flew 1,260 flights on the same city pair under all its flight numbers, including this one, and those ran 74.9% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight trails by 19 points.

DL 700 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 700thin sample	271	62.4%	69 min	1.11%	D
All Delta Air Lines on DTW–SAN	1,260	74.9%	58 min	1.03%	C
All carriers on DTW–SAN	1,314	75.4%	58 min	1.07%	B
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 700 quarter by quarter

DL 700 did not run the same all year. Its best quarter was Jan–Mar 2026 at 72.7% on time and its weakest Oct–Dec 2025 at 52.5%, a swing of 20 points on roughly 68 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 202560 flights54.4%
Oct–Dec 202560 flights52.5%
Jan–Mar 202689 flights72.7%
Apr–Jun 202662 flights64.5%

Scale runs 45% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, DL 700 did best on Wednesday at 80.6% on time and worst on Sunday at 51.1%. Each day rests on about 39 flights, so a gap of 29 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 700 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 6,865 reported delay minutes.

Carrier
34%
Late-arriving aircraft
32%
National Airspace System
30%
Extreme weather
4%

The largest share of delay minutes, 34%, 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 2,342 of the 6,865 delay minutes reported here. The split is drawn from 6,865 delay minutes reported on DL 700.

Cancellations sit at 1.11% against a national 1.81%, which is ordinary. Diversions add another 0.74%.

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. 12.4% 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 1,956 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.

The same number turns up on one other city pair in the data, including MIA to BOS (4), but none flew often enough under DL 700 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DTW to SAN only.

One caution: this is a thin sample. 271 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 700

For a booking, DL 700 is a flight to put a long connection behind. 12.4% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.

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