Carrier route record
DLPSC→SLC
Delta Air Lines · Pasco to Salt Lake City
- Flights
- 349
- 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 PSC to SLC earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 17 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 3.2 hours. That rests on 349 flights, with a median arrival 11 minutes early.
Set against the rest of the country, Delta's PSC to SLC record is 17 points better than the US average of 77.3%. That gap is worth roughly 172 fewer late arrivals for every thousand flights.
Key figures
On time
94.5%
Arrivals under 15 minutes late, of 347 completed flights
Avg delay
193 min
Across delayed arrivals only, not all flights
Cancelled
0.57%
National rate is 1.89%
Whole route
93.5%
Every carrier on PSC to SLC, 1,177 flights
These figures cover 349 flights between September 2025 and August 2026. The median arrival is 11 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 PSC to SLC
Delta flew 349 of the 1,177 flights on PSC to SLC, about 30% of it. Its 94.5% on time is about level with the route as a whole at 93.5%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Delta at 94.5% to SkyWest at 93.1%.
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 |
|---|---|---|---|---|---|
| Delta Air Lines (this page)thin sample | 349 | 94.5% | 193 min | 0.57% | A+ |
| SkyWest Airlines | 828 | 93.1% | 76 min | 0.00% | 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 349 flights.
There are not enough flights in each departure window to split Delta's PSC to SLC record by time of day without the percentages moving on noise. The headline rate of 94.5% is the reliable figure here.
Across the year
Delta on PSC to SLC through the year
April is the best month on the calendar at 100.0% 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 100.0% on time and Saturday the weakest at 85.7%, a spread of 14 points.
Arrival by arrival
How late Delta on PSC to SLC runs when it is late
Delta on PSC to SLC often beats the schedule: 129 of 347 completed flights, 37%, arrived 15 minutes or more early. When Delta on PSC to SLC is late it tends to be very late: 12 of its 19 late arrivals were an hour or more behind, and 10 were two hours or more.
- 15+ min early129 flights37.2%
- Within 15 min199 flights57.3%
- 15–29 min late7 flights2.0%
- 30–59 min late0 flights0.0%
- 1–2 hours late2 flights0.6%
- 2+ hours late10 flights2.9%
Scale runs 0% to 100%.
Share of 347 completed flights by arrival against schedule.
Only 18 of 347 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for Delta on PSC to SLC
The latest arrival of the period was on 6 November 2025, 9 hours 51 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 extreme weather.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 6 November 2025 | 9 hours 51 minutes | Carrier |
| 22 November 2025 | 7 hours 47 minutes | Extreme weather |
| 13 February 2026 | 7 hours 47 minutes | Extreme weather |
| 21 March 2026 | 7 hours 2 minutes | Carrier |
| 15 January 2026 | 5 hours 5 minutes | Extreme weather |
Delay causes
Why Delta runs late on this route
Carrier accounts for 61% of the 3,666 delay minutes carriers reported here, and the remaining four split what is left.
- 61%Carrier
- 37%Extreme weather
- 3%National Airspace System
Extreme weather accounts for 37% 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 6.1 times the usual weather exposure. The split is drawn from 3,666 reported delay minutes.
The largest share of delay minutes, 61%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,224 of the 3,666 delay minutes reported here.
Cancellations are rare at 0.57%, 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
Badly late arrivals are rare here: only 3.5% 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 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 86.3% on time across 348 flights, 8 points below 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. 349 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 PSC to SLC
Put together: treat all of this as provisional. 349 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 94.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 347 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.