PHX to SLC flight delays
Phoenix, AZ (PHX) Salt Lake City, UT (SLC) · 507 miles
435 flights · March 2025 – August 2026 · US Bureau of Transportation Statistics
79.31%
Arrived on time
Within 15 minutes of schedule
0%
Cancelled
Share of scheduled flights
60 min
When late, late by
Average across delayed arrivals
13 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. Delta Air Lines arrived on time 33.6 points more often than Southwest Airlines over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
This route does better than its own airport. Departures from PHX overall run 9.7 points less punctual than this particular one — so whatever congestion PHX has, this route is largely escaping it.
This is a thin route — 435 flights across the whole period. On a route this infrequent a cancellation is far more costly than the rate suggests, because the next departure may not be the same day.
The Phoenix to Salt Lake City route sits close to the middle of the record — neither notably punctual nor notably late.
Which airline should you fly on this route?
Over March 2025 – August 2026, Delta Air Lines arrived on time most often on PHX to SLC. Southwest Airlines was late most often.
Every airline on PHX to SLC
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 143 | 59.44% | 0% | 45 min | D |
| Delta Air Lines | 143 | 93.01% | 0% | 43 min | A |
| SkyWest Airlines | 81 | 80.25% | 0% | 116 min | — |
| Frontier Airlines | 59 | 91.53% | 0% | 102 min | — |
| Envoy Air | 9 | 88.89% | 0% | 34 min | — |
The return leg
SLC to PHX Salt Lake City back to Phoenix 78.75% on time COther routes from Phoenix
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on PHX to SLC during March 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →