Flight number record
DL 1304
Delta Air Lines · Salt Lake City to Santa Ana
- Route
- SLC → SNA
- Departs
- 20:55
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 1304, check with Delta Air Lines.
DL 1304 earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 364 flights, with a median arrival 9 minutes early.
Set against the rest of the country, DL 1304's record is 7 points better than the US average of 77.3%. That gap is worth roughly 72 fewer late arrivals for every thousand flights.
Key figures
On time
84.5%
Arrivals under 15 minutes late, of 362 completed flights
Avg delay
80 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
1.7%
National rate is 8.3%
These figures cover 364 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 1304 flies
DL 1304 flies SLC to SNA without a single fixed slot. Its most common scheduled departure was 20:55, used on 92 of 364 flights, with 21:30 (84 flights) and 21:05 (82 flights) next.
- Departs 20:5592 flights25.3%
- Departs 21:3084 flights23.1%
- Departs 21:0582 flights22.5%
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 1304 runs 14 points better at 84.5%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
DL 1304 next to SLC to SNA
Every carrier on SLC to SNA combined arrived on time 83.1% of the time across 1,858 flights, so DL 1304 is about level with it. Delta flew 1,606 flights on the same city pair under all its flight numbers, including this one, and those ran 83.0% on time. Across its whole network Delta Air Lines managed 81.1%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| DL 1304thin sample | 364 | 84.5% | 80 min | 0.00% | B+ |
| All Delta Air Lines on SLC–SNA | 1,606 | 83.0% | 62 min | 0.50% | B+ |
| All carriers on SLC–SNA | 1,858 | 83.1% | 63 min | 0.70% | B+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 1304 quarter by quarter
Quarter by quarter DL 1304 held fairly steady: 83.3% in Jul–Sep 2025, 81.1% in Oct–Dec 2025, 88.9% in Jan–Mar 2026, 85.7% in Apr–Jun 2026 and 82.0% in Jul–Sep 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights83.3%
- Oct–Dec 202591 flights81.1%
- Jan–Mar 202690 flights88.9%
- Apr–Jun 202691 flights85.7%
- Jul–Sep 202662 flights82.0%
Scale runs 75% to 95%.
By weekday, DL 1304 did best on Monday at 92.5% on time and worst on Friday at 73.1%. Each day rests on about 52 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 1304 runs when it is late
DL 1304 often beats the schedule: 117 of 362 completed flights, 32%, arrived 15 minutes or more early. Most of the lateness is short. 32 of the 56 late arrivals were under half an hour behind, and 6 reached an hour or more.
- 15+ min early117 flights32.3%
- Within 15 min189 flights52.2%
- 15–29 min late32 flights8.8%
- 30–59 min late18 flights5.0%
- 1–2 hours late1 flights0.3%
- 2+ hours late5 flights1.4%
Scale runs 0% to 100%.
Share of 362 completed flights by arrival against schedule.
15 of 60 late departures made up the time and arrived on time, 25% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for DL 1304
The latest arrival of the period was on 24 July 2026, 13 hours 18 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 July 2026 | 13 hours 18 minutes | Carrier |
| 17 February 2026 | 9 hours 39 minutes | Carrier |
| 26 July 2026 | 9 hours 23 minutes | Carrier |
| 12 September 2025 | 9 hours 12 minutes | Carrier |
| 2 September 2025 | 8 hours 48 minutes | Carrier |
Delay causes
Why DL 1304 runs late
Carrier accounts for 84% of the 4,477 delay minutes carriers reported here, and the remaining four split what is left.
- 84%Carrier
- 10%Late-arriving aircraft
- 5%National Airspace System
- 1%Extreme weather
The largest share of delay minutes, 84%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,754 of the 4,477 delay minutes reported here. The split is drawn from 4,477 delay minutes reported on DL 1304.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 1.7% land an hour or more behind schedule, against 8.3% 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.
The 588 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.
Every one of the 364 flights under DL 1304 in the data flew SLC to SNA. 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. 364 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 1304
For a booking, read DL 1304 as 84.5% on time with 0.00% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SLC to SNA, every carrier and departure
- SNA to SLC, the return direction
- Delta Air Lines 1198 on the same route88.8%
- Delta Air Lines 1277 on the same route81.1%
- Delta Air Lines 1189 on the same route77.5%
- Salt Lake City International (SLC) delay statistics
- John Wayne Airport (SNA) 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
- Worst months to fly in the US, ranked by the data
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.