Carrier route record
DLSLC→PSC
Delta Air Lines · Salt Lake City to Pasco
- Flights
- 348
- Period
- September 2025 to August 2026
- Share of route
- 30%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on SLC to PSC 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 9 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 348 flights, with a median arrival 9 minutes early.
Set against the rest of the country, Delta's SLC to PSC record is 9 points better than the US average of 77.3%. That gap is worth roughly 90 fewer late arrivals for every thousand flights.
Key figures
On time
86.3%
Arrivals under 15 minutes late, of 343 completed flights
Avg delay
82 min
Across delayed arrivals only, not all flights
Cancelled
0.29%
National rate is 1.89%
Whole route
89.3%
Every carrier on SLC to PSC, 1,177 flights
These figures cover 348 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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Carrier by carrier
Delta against every carrier on SLC to PSC
Delta flew 348 of the 1,177 flights on SLC to PSC, about 30% of it. Its 86.3% on time is 3 points worse than the route as a whole, which runs 89.3%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from SkyWest at 90.6% to Delta at 86.3%.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines | 829 | 90.6% | 60 min | 0.12% | A+ |
| Delta Air Lines (this page)thin sample | 348 | 86.3% | 82 min | 0.29% | A+ |
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Departure window
When Delta runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 348 flights.
The overnight block holds up unusually well at 86.3% on time across 347 flights. Red-eyes fly into empty airspace and empty gates, and they are the first rotation of the aircraft's day rather than the last. The 8pm–5am window is the busiest, with 347 flights scheduled in it.
Across the year
Delta on SLC to PSC through the year
April is the best month on the calendar at 93.3% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. March was the busiest month here, with 31 flights.
Across the week, Tuesday is the strongest day at 90.0% on time and Monday the weakest at 82.0%, a spread of 8 points.
Arrival by arrival
How late Delta on SLC to PSC runs when it is late
Delta on SLC to PSC often beats the schedule: 100 of 343 completed flights, 29%, arrived 15 minutes or more early. The 47 late arrivals split 13 under half an hour, 14 between 30 and 60 minutes, and 20 an hour or more.
- 15+ min early100 flights29.2%
- Within 15 min196 flights57.1%
- 15–29 min late13 flights3.8%
- 30–59 min late14 flights4.1%
- 1–2 hours late15 flights4.4%
- 2+ hours late5 flights1.5%
Scale runs 0% to 100%.
Share of 343 completed flights by arrival against schedule.
8 of 47 late departures made up the time and arrived on time, 17% of them. 8 flights left on time and still arrived late.
The worst days
Worst days for Delta on SLC to PSC
The latest arrival of the period was on 14 January 2026, 11 hours 59 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across January, November, July, April and June, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 January 2026 | 11 hours 59 minutes | Extreme weather |
| 21 November 2025 | 10 hours 53 minutes | Extreme weather |
| 24 July 2026 | 4 hours | Late-arriving aircraft |
| 7 April 2026 | 2 hours 29 minutes | Carrier |
| 24 June 2026 | 2 hours 4 minutes | Carrier |
Delay causes
Why Delta runs late on this route
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 3,866 reported delay minutes.
- 36%Extreme weather
- 29%Carrier
- 28%Late-arriving aircraft
- 7%National Airspace System
Extreme weather accounts for 36% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 6.0 times the usual weather exposure. The split is drawn from 3,866 reported delay minutes.
Cancellations are rare at 0.29%, 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 stage length
What a delay here 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 an hour and a half, which a normal layover absorbs.
The 521 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 return leg is a different operation and performs like one: it runs 94.5% on time across 349 flights, 8 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 8 points of difference.
One caution: this is a thin sample. 348 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 Delta on SLC to PSC
Put together: treat all of this as provisional. 348 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 86.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 343 completed flights over 12 months sit behind that.
Related
Where to go next
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.