SLC to PHX flight delays
Salt Lake City, UT (SLC) Phoenix, AZ (PHX) · 507 miles
5,759 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
83.92%
Arrived on time
Within 15 minutes of schedule
0.56%
Cancelled
Share of scheduled flights
71 min
When late, late by
Average across delayed arrivals
12 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 8.3 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.
The shape of the lateness matters here. Flights on this route are not late often, but when they are late they are late by about 71 minutes — long enough to lose a connection or an evening. The on-time percentage looks reassuring and understates the consequence of being on the wrong flight.
This is one of the heavily flown routes in the record — 5,759 flights in the period. Frequency is itself a form of insurance: when a flight goes wrong there is another one within hours, which is not true of the thin routes elsewhere on this site.
Flights from Salt Lake City to Phoenix keep to schedule more reliably than most. On a route this punctual the day you fly matters more than the airline you pick.
Which airline should you fly on this route?
Over January 2025 – August 2026, Delta Air Lines arrived on time most often on SLC to PHX. Southwest Airlines was late most often. Flights ran closest to schedule in September and worst in November.
Every airline on SLC to PHX
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 | 1,860 | 79.58% | 0.43% | 54 min | C |
| Delta Air Lines | 1,708 | 87.86% | 0.53% | 56 min | A |
| SkyWest Airlines | 1,159 | 86.49% | 0.26% | 111 min | A |
| Frontier Airlines | 677 | 81.5% | 1.48% | 89 min | C |
| American Airlines | 266 | 84.53% | 0.38% | 108 min | B |
| Envoy Air | 89 | 81.61% | 1.12% | 45 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
PHX to SLC Phoenix back to Salt Lake City 83.04% on time BOther routes from Salt Lake City
Common questions
Are flights from Salt Lake City to Phoenix usually delayed?
83.92% of flights on the SLC to PHX route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airline is most on time from Salt Lake City to Phoenix?
Delta Air Lines, at 87.86% on time across 1,708 flights. The least punctual on the route was Southwest Airlines at 79.58%.
How often are SLC to PHX flights cancelled?
0.56% of scheduled flights did not operate — about 6 in every thousand. That is in the normal range.
What is the best month to fly Salt Lake City to Phoenix?
September, when 87.8% of flights arrived on time. The worst was November at 78.5%.
When SLC to PHX flights are late, how late are they?
About 71 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on SLC to PHX during January 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 →