Flight number record
DL 2533
Delta Air Lines · San Diego to Seattle
- Route
- SAN → SEA
- Departs
- 13:40
- Flights
- 347
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 2533, check with Delta Air Lines.
DL 2533 lands a B+, 4 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about 55 minutes on average. That rests on 347 flights, with a median arrival 9 minutes early.
Key figures
On time
81.1%
Arrivals under 15 minutes late, of 344 completed flights
Avg delay
54 min
Across delayed arrivals only, not all flights
Cancelled
0.86%
National rate is 1.89%
1 hour+ late
5.8%
National rate is 8.3%
These figures cover 347 flights between September 2025 and August 2026. The median arrival is 9 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.
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Schedule
When DL 2533 flies
DL 2533 flies SAN to SEA without a single fixed slot. Its most common scheduled departure was 13:40, used on 85 of 347 flights, with 13:45 (61 flights) and 13:36 (56 flights) next.
- Departs 13:4085 flights24.5%
- Departs 13:4561 flights17.6%
- Departs 13:3656 flights16.1%
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 13:40 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 2533 runs 3 points better at 81.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
DL 2533 next to SAN to SEA
Every carrier on SAN to SEA combined arrived on time 81.1% of the time across 4,646 flights, so DL 2533 is about level with it. Delta flew 1,710 flights on the same city pair under all its flight numbers, including this one, and those ran 86.6% on time. Across its whole network Delta Air Lines managed 81.1%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 2533thin sample | 347 | 81.1% | 54 min | 0.86% | B+ |
| All Delta Air Lines on SAN–SEA | 1,710 | 86.6% | 77 min | 1.11% | A |
| All carriers on SAN–SEA | 4,646 | 81.1% | 63 min | 1.42% | B |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 2533 quarter by quarter
DL 2533 did not run the same all year. Its best quarter was Jan–Mar 2026 at 93.6% on time and its weakest Jul–Sep 2026 at 59.7%, a swing of 34 points on roughly 69 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 202530 flights90.0%
- Oct–Dec 202589 flights79.5%
- Jan–Mar 202680 flights93.6%
- Apr–Jun 202686 flights83.7%
- Jul–Sep 202662 flights59.7%
Scale runs 50% to 100%.
By weekday, DL 2533 did best on Saturday at 88.4% on time and worst on Thursday at 68.0%. Each day rests on about 50 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 2533 runs when it is late
DL 2533 often beats the schedule: 125 of 344 completed flights, 36%, arrived 15 minutes or more early. The 65 late arrivals split 27 under half an hour, 18 between 30 and 60 minutes, and 20 an hour or more.
- 15+ min early125 flights36.3%
- Within 15 min154 flights44.8%
- 15–29 min late27 flights7.8%
- 30–59 min late18 flights5.2%
- 1–2 hours late11 flights3.2%
- 2+ hours late9 flights2.6%
Scale runs 0% to 100%.
Share of 344 completed flights by arrival against schedule.
A late pushback is often recovered here: of 70 departures that left 15 minutes late or more, 21 still arrived on time. 16 flights left on time and still arrived late.
The worst days
Worst days for DL 2533
The latest arrival of the period was on 12 August 2026, 3 hours 23 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 12 August 2026 | 3 hours 23 minutes | Carrier |
| 16 May 2026 | 3 hours 12 minutes | Late-arriving aircraft |
| 24 August 2026 | 2 hours 58 minutes | Carrier |
| 18 September 2025 | 2 hours 48 minutes | Late-arriving aircraft |
| 10 December 2025 | 2 hours 39 minutes | Late-arriving aircraft |
Delay causes
Why DL 2533 runs late
Late-arriving aircraft accounts for 64% of the 3,523 delay minutes carriers reported here, and the remaining four split what is left.
- 64%Late-arriving aircraft
- 21%Carrier
- 14%National Airspace System
- 0%Extreme weather
64% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,523 reported delay minutes here, that single category outweighs weather by 64 to one. The split is drawn from 3,523 delay minutes reported on DL 2533.
Cancellations are rare at 0.86%, 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
5.8% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 55 minutes, which a normal layover absorbs.
The 1,050 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.
DL 2533 is not only a SAN to SEA flight. It also flew SEA to SAN (339 flights, 77.4% 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. 347 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SEA to SANthin sample | 339 | 77.4% | 43 min | 0.88% | B+ |
What to do with this
Booking DL 2533
For a booking, read DL 2533 as 81.1% on time with 0.86% cancelled over 347 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SAN to SEA, every carrier and departure
- SEA to SAN, the return direction
- Delta Air Lines 2530 on the same route90.9%
- Delta Air Lines 2508 on the same route90.5%
- Delta Air Lines 2572 on the same route85.3%
- Delta Air Lines 2613 on the same route84.5%
- San Diego International (SAN) delay statistics
- Seattle-Tacoma International (SEA) 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.