Flight number record
DL 700
Delta Air Lines · Detroit to San Diego
- Route
- DTW → SAN
- Departs
- 20:55
- Flights
- 261
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 261 flights, with a median arrival 7 minutes late.
The national on-time rate over the same period is 77.3%, so DL 700 runs 16 points behind the country as a whole. Across a thousand flights that is about 162 extra late arrivals.
Key figures
On time
61.1%
Arrivals under 15 minutes late, of 257 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
0.38%
National rate is 1.89%
1 hour+ late
13.2%
National rate is 8.3%
These figures cover 261 flights between September 2025 and August 2026. Beyond the headline rate, 13.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
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 261 flights, with 20:05 (55 flights) and 20:25 (46 flights) next.
- Departs 20:5560 flights23.0%
- Departs 20:0555 flights21.1%
- Departs 20:2546 flights17.6%
Scale runs 0% to 100%.
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 70.1%, and DL 700 runs 9 points worse at 61.1%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
DL 700 next to DTW to SAN
Every carrier on DTW to SAN combined arrived on time 73.5% of the time across 1,269 flights, so DL 700 is 12 points behind it. Delta flew 1,250 flights on the same city pair under all its flight numbers, including this one, and those ran 73.3% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight trails by 20 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 700thin sample | 261 | 61.1% | 75 min | 0.38% | D+ |
| All Delta Air Lines on DTW–SAN | 1,250 | 73.3% | 60 min | 0.80% | C+ |
| All carriers on DTW–SAN | 1,269 | 73.5% | 60 min | 0.87% | C+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | 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 Jul–Sep 2026 at 43.8%, a swing of 29 points on roughly 65 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 202517 flights—
- Oct–Dec 202560 flights52.5%
- Jan–Mar 202689 flights72.7%
- Apr–Jun 202662 flights64.5%
- Jul–Sep 202633 flights43.8%
Scale runs 35% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, DL 700 did best on Friday at 60.9% on time and worst on Thursday at 48.9%. Each day rests on about 37 flights, so a gap of 12 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 700 runs when it is late
The 100 late arrivals split 40 under half an hour, 26 between 30 and 60 minutes, and 34 an hour or more.
- 15+ min early41 flights16.0%
- Within 15 min116 flights45.1%
- 15–29 min late40 flights15.6%
- 30–59 min late26 flights10.1%
- 1–2 hours late17 flights6.6%
- 2+ hours late17 flights6.6%
Scale runs 0% to 100%.
Share of 257 completed flights by arrival against schedule.
21 of 92 late departures made up the time and arrived on time, 23% of them. In the other direction, 29 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SAN.
The worst days
Worst days for DL 700
The latest arrival of the period was on 14 June 2026, 14 hours 2 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across June, March, August, December and July, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 June 2026 | 14 hours 2 minutes | National Airspace System |
| 21 March 2026 | 13 hours 26 minutes | Carrier |
| 6 August 2026 | 3 hours 19 minutes | National Airspace System |
| 7 December 2025 | 3 hours 12 minutes | Late-arriving aircraft |
| 24 July 2026 | 3 hours 12 minutes | Late-arriving aircraft |
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 7,481 reported delay minutes.
- 35%Late-arriving aircraft
- 31%National Airspace System
- 26%Carrier
- 6%Extreme weather
- 1%Security
35% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,481 reported delay minutes here, that single category outweighs weather by 6 to one. The split is drawn from 7,481 delay minutes reported on DL 700.
Cancellations are rare at 0.38%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
13.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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 (1), 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. 261 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. 13.2% 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.
Related
Where to go next
- DTW to SAN, every carrier and departure
- SAN to DTW, the return direction
- Delta Air Lines 492 on the same route82.8%
- Delta Air Lines 369 on the same route71.8%
- Detroit Metropolitan Wayne County (DTW) delay statistics
- San Diego International (SAN) delay statistics
- Delta Air Lines on-time record
- Every Delta Air Lines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.