Flight number record

DL 1304

Delta Air Lines · Salt Lake City to Santa Ana

Route: SLC → SNA
Departs: 21:30
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 1304, check with Delta Air Lines.

DL 1304 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 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 8 points better than the US average of 77.6%. That gap is worth roughly 80 fewer late arrivals for every thousand flights.

On time

85.6%

Arrivals under 15 minutes late, of 362 completed flights

Avg delay

67 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

1.1%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 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.

Schedule

When DL 1304 flies

DL 1304 flies SLC to SNA without a single fixed slot. Its most common scheduled departure was 21:30, used on 105 of 364 flights, with 20:55 (92 flights) and 20:50 (47 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:30105 flights28.8%
Departs 20:5592 flights25.3%
Departs 20:5047 flights12.9%

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 21:30 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and DL 1304 runs 15 points better at 85.6%. 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 1304 next to SLC to SNA

Every carrier on SLC to SNA combined arrived on time 84.2% of the time across 1,854 flights, so DL 1304 is about level with it. Delta flew 1,655 flights on the same city pair under all its flight numbers, including this one, and those ran 84.0% on time. Across its whole network Delta Air Lines managed 81.6%, which this flight beats by 4 points.

DL 1304 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 1304thin sample	364	85.6%	67 min	0.00%	A+
All Delta Air Lines on SLC–SNA	1,655	84.0%	58 min	0.48%	B+
All carriers on SLC–SNA	1,854	84.2%	59 min	0.70%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 1304 quarter by quarter

Quarter by quarter DL 1304 held fairly steady: 86.8% in Jul–Sep 2025, 81.1% in Oct–Dec 2025, 88.9% in Jan–Mar 2026 and 85.7% in Apr–Jun 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 202592 flights86.8%
Oct–Dec 202591 flights81.1%
Jan–Mar 202690 flights88.9%
Apr–Jun 202691 flights85.7%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, DL 1304 did best on Monday at 92.3% on time and worst on Friday at 78.8%. Each day rests on about 52 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 1304 runs late

One category carries most of the weight here. Carrier accounts for 83% of the 3,460 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
83%
Late-arriving aircraft
10%
National Airspace System
6%
Extreme weather
0%

The largest share of delay minutes, 83%, 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 2,882 of the 3,460 delay minutes reported here. The split is drawn from 3,460 delay minutes reported on DL 1304.

Cancellations are rare at 0.00%, below the national 1.81% 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 1.1% 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.

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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

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, DL 1304 has one of the better records a US domestic flight can show: 85.6% on time and 0.00% 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