Route reliability record
PSC→SLC
Pasco to Salt Lake City
- Flights
- 1,180
- Period
- July 2025 to June 2026
- Distance
- 521 mi
- Carriers
- 2
This route earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.6%. When something does go wrong the average delay runs close to two hours. That rests on 1,180 PSC to SLC flights, with a median arrival 13 minutes early.
Best time to fly PSC to SLC: a 8am–11am departure, ideally on a Monday. Flights in that window arrived on time 96.6% of the time and Monday flights 95.9%, against 93.7% for the route overall.
Set against the rest of the country, this route's record is 16 points better than the US average of 77.6%. That gap is worth roughly 161 fewer late arrivals for every thousand flights.
Key figures
On time
93.7%
Arrivals under 15 minutes late, of 1,178 completed flights
Avg delay
112 min
Across delayed arrivals only, not all flights
Cancelled
0.08%
National rate is 1.81%
Best carrier
SkyWest
93.1% on time across 831 flights
These figures cover 1,180 flights between July 2025 and June 2026. The median arrival is 13 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.
Carrier by carrier
Which airline is most reliable on PSC to SLC
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 Linesthin sample | 349 | 95.1% | 238 min | 0.29% | A+ |
| SkyWest Airlines | 831 | 93.1% | 74 min | 0.00% | A+ |
Flight by flight
Flights on PSC to SLC
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
Departure window
The best time of day to leave
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 1,180 flights.
- 5am–8am365 flights95.1%
- 8am–11am116 flights96.6%
- 11am–2pm313 flights93.3%
- 2pm–5pm52 flights96.2%
- 5pm–8pm334 flights91.3%
- 8pm–5am—
Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.
The early departures do better, though not dramatically: 96.6% on time for the 8am–11am window against 91.3% for 5pm–8pm. Worth taking if the schedule allows, not worth an extra connection. The 5am–8am window is the busiest, with 365 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 12 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
Delays peak in March, when the on-time rate falls to 88.0%. June is the strongest month at 100.0%. Moving a flexible trip across that boundary buys 12 points. July was the busiest month here, with 122 flights.
Across the week, Monday is the strongest day at 95.9% on time and Thursday the weakest at 91.8%. 4 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
One category carries most of the weight here. Carrier accounts for 63% of the 8,258 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.
- 63%Carrier
- 34%Extreme weather
- 2%National Airspace System
- 1%Security
Extreme weather accounts for 34% 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 5.5 times the usual weather exposure. The split is drawn from 8,258 reported delay minutes.
The largest share of delay minutes, 63%, 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 5,173 of the 8,258 delay minutes reported here.
Cancellations are rare at 0.08%, below the national 1.81% 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 actually costs
Badly late arrivals are rare here: only 2.8% 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 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. 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.
The return leg is a different operation and performs like one: it runs 89.0% on time across 1,180 flights, 5 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 5 points of difference.
The sample behind these figures is 1,180 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in SLC after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. June runs 100.0% on time and March 88.0%, a swing of 12 points. If the dates move at all, move them out of March before you think about anything else. 1,178 completed flights over 12 months sit behind that.
Common questions
PSC to SLC questions
How often is PSC to SLC delayed?
About one flight in fifteen arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 6.3% of the 1,180 flights in this analysis, against 22.4% nationally. Delayed flights are late by close to two hours on average.
How reliable is PSC to SLC compared with the rest of the country?
93.7% of flights arrive on time here against a national 77.6%, a difference of 16 points in its favour. That is worth a A+ on this site's grading scale.
What time of day has the fewest delays on PSC to SLC?
The 8am–11am departure window is the strongest at 96.6% on time. The 5pm–8pm window is the weakest at 91.3%, 5 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are March delays on PSC to SLC?
March is the weakest month at 88.0% on time, compared with 100.0% in June. Across the year that is 12 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- SLC to PSC — the return legseparate record
- Salt Lake City International (SLC) delay statistics
- Delta Air Lines on PSC to SLC95.1%
- SkyWest Airlines on PSC to SLC93.1%
- PSC to SEA, a related route88.3%
- DEN to SLC, a related route77.5%
- PSC to DEN, a related route89.4%
- Delta Air Lines on-time record95.1%
- SkyWest Airlines on-time record93.1%
- Worst months to fly in the US, ranked by the data
- Late aircraft, weather, or the airline: what actually causes US flight delays
Direction matters. PSC to SLC and SLC to PSC are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.