Flight number record
DL 930
Delta Air Lines · San Antonio to Salt Lake City
- Route
- SAT → SLC
- Departs
- 12:39
- Flights
- 327
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s DL 930, check with Delta Air Lines.
DL 930 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 327 flights, with a median arrival 7 minutes early.
Key figures
On time
81.1%
Arrivals under 15 minutes late, of 323 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
0.92%
National rate is 1.89%
1 hour+ late
5.6%
National rate is 8.3%
These figures cover 327 flights between September 2025 and August 2026. The median arrival is 7 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 930 flies
DL 930 flies SAT to SLC without a single fixed slot. Its most common scheduled departure was 12:39, used on 74 of 327 flights, with 12:40 (59 flights) next.
- Departs 12:3974 flights22.6%
- Departs 12:4059 flights18.0%
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 12:39 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and DL 930 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 930 next to SAT to SLC
Every carrier on SAT to SLC combined arrived on time 86.9% of the time across 1,014 flights, so DL 930 is 6 points behind it. 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 930thin sample | 327 | 81.1% | 55 min | 0.92% | B+ |
| All Delta Air Lines on SAT–SLC | 1,014 | 86.9% | 78 min | 0.89% | A+ |
| All carriers on SAT–SLC | 1,014 | 86.9% | 78 min | 0.89% | A+ |
| Delta Air Lines, whole network | 1,039,517 | 81.1% | 71 min | 1.74% | B |
Across the year
DL 930 quarter by quarter
DL 930 did not run the same all year. Its best quarter was Apr–Jun 2026 at 86.7% on time and its weakest Oct–Dec 2025 at 75.0%, a swing of 12 points on roughly 82 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 flights—
- Oct–Dec 202580 flights75.0%
- Jan–Mar 202683 flights82.9%
- Apr–Jun 202677 flights86.7%
- Jul–Sep 202657 flights86.0%
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, DL 930 did best on Sunday at 89.1% on time and worst on Friday at 74.0%. Each day rests on about 47 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late DL 930 runs when it is late
DL 930 often beats the schedule: 93 of 323 completed flights, 29%, arrived 15 minutes or more early. The 61 late arrivals split 24 under half an hour, 19 between 30 and 60 minutes, and 18 an hour or more.
- 15+ min early93 flights28.8%
- Within 15 min169 flights52.3%
- 15–29 min late24 flights7.4%
- 30–59 min late19 flights5.9%
- 1–2 hours late12 flights3.7%
- 2+ hours late6 flights1.9%
Scale runs 0% to 100%.
Share of 323 completed flights by arrival against schedule.
10 of 60 late departures made up the time and arrived on time, 17% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for DL 930
The latest arrival of the period was on 22 September 2025, 3 hours 34 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 22 September 2025 | 3 hours 34 minutes | Late-arriving aircraft |
| 21 May 2026 | 3 hours 13 minutes | Carrier |
| 7 September 2025 | 3 hours 10 minutes | Late-arriving aircraft |
| 2 December 2025 | 2 hours 35 minutes | Late-arriving aircraft |
| 10 November 2025 | 2 hours 14 minutes | Late-arriving aircraft |
Delay causes
Why DL 930 runs late
Late-arriving aircraft accounts for 64% of the 3,331 delay minutes carriers reported here, and the remaining four split what is left.
- 64%Late-arriving aircraft
- 26%Carrier
- 10%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 3,331 reported delay minutes here, that single category outweighs weather by 64 to one. The split is drawn from 3,331 delay minutes reported on DL 930.
Cancellations sit at 0.92% against a national 1.89%, which is ordinary. Diversions add another 0.31%.
Connections and routes
What a delay on this flight costs
5.6% 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 1,087 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.
The same number turns up on one other city pair in the data, including SFO to ATL (16), but none flew often enough under DL 930 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SAT to SLC only.
One caution: this is a thin sample. 327 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 930
For a booking, DL 930 is one of the weaker ways to fly SAT to SLC: 6 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- SAT to SLC, every carrier and departure
- SLC to SAT, the return direction
- Delta Air Lines 2592 on the same route94.8%
- San Antonio International (SAT) delay statistics
- Salt Lake City International (SLC) 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.