Route profile
SLC→PHX
Flight reliability, delays and best times to fly from Salt Lake City to Phoenix, 507 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 86% of comparable major US routes (4,598 compared)
Calculated from 17,778 flights. How this is calculated
SLC → PHX arrives on time 83.7% of the time; the return trip, PHX → SLC, arrives on time 84.5% of the time.
SLC → PHX spends 25.2 minutes on the ground on a 507-mile trip: 17.5 minutes from pushback to wheels-up at SLC and 7.8 minutes from touchdown to gate at PHX.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Why SLC → PHX flights are cancelled
July 2023 – July 2026
SLC → PHX cancelled 79 of 17,778 scheduled flights — about 1 in every 225. The reason filed most often was the airline, 74.7% of the cancellations coded on this route — about 1 in every 301 scheduled flights.
Share of cancellations
Of 79 cancelled departures carrying a reason code.
What each reason means
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
59 cancellations, 74.7% of the total.
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
13 cancellations, 16.5% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
7 cancellations, 8.9% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
0 cancellations, 0.0% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
79 coded cancellations were recorded on SLC → PHX; the section appears from 50.
When it goes wrong
July 2023 – July 2026
30 min late
against a median of 8 min early
Percentiles over 17,778 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at PHX after arriving from SLC.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 30% | Likely to miss |
| 45 min | 16% | High risk |
| 60 min | 9.8% | Some risk |
| 90 min | 5.0% | Some risk |
| 120 min | 3.0% | Low risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 0.44% of the time and diverts 0.13% of the time, which a late arrival never shows up in.
Chance of missing is the share of 17,676 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 30 minutes late (90th-percentile gate arrival delay), over 17,778 operations.
Any other layover length: connection checker.
Best time to fly
SLC → PHX flights departing 5–9 AM arrived on time 91.9% of the time, against 72.3% for 6–9 PM departures, a gap of 19.6 percentage points.
By day and hour
On-time arrival rate for each weekday and scheduled departure hour, in local time at the departure airport (SLC).
Hour of departure matters more than day of the week: hourly averages sit a typical 7.5 points from the route-wide rate, weekday averages 1.7 points.
| Hour | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday | Sunday |
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| 10 PM–11 PM |
On-time rate, % · stronger color, fewer on time
- 65–69
- 70–74
- 75–79
- 80–84
- 85–89
- 90–94
- 95–99
- Fewer than 120 flights, not scored
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · On time is arrival within 15 minutes of schedule. Cells round to whole percentages; the table shows one decimal.
No slot is named best or worst: too few reach 500 flights. Departures before 6 AM and after 11 PM (718 flights) are not drawn: no slot in those hours has enough flights to score.
View as tableHide table
| Hour | Monday | Tuesday | Wednesday | Thursday | Friday | Saturday | Sunday |
|---|---|---|---|---|---|---|---|
| 6 AM–7 AM | 97.7% on time132 flights | 87 flights, too few to score | 85 flights, too few to score | 94.6% on time130 flights | 94.0% on time133 flights | 119 flights, too few to score | 101 flights, too few to score |
| 7 AM–8 AM | 92.9% on time128 flights | 89.2% on time162 flights | 95.0% on time162 flights | 90.4% on time126 flights | 89.6% on time125 flights | 88.5% on time124 flights | 89.6% on time135 flights |
| 8 AM–9 AM | 88.8% on time305 flights | 89.8% on time294 flights | 91.2% on time284 flights | 90.0% on time310 flights | 93.1% on time305 flights | 92.3% on time275 flights | 86.9% on time289 flights |
| 9 AM–10 AM | 70 flights, too few to score | 71 flights, too few to score | 75 flights, too few to score | 85 flights, too few to score | 80 flights, too few to score | 52 flights, too few to score | 60 flights, too few to score |
| 10 AM–11 AM | 90.4% on time135 flights | 106 flights, too few to score | 107 flights, too few to score | 89.5% on time124 flights | 87.9% on time125 flights | 89.3% on time122 flights | 87.4% on time127 flights |
| 11 AM–12 PM | 88.0% on time242 flights | 89.2% on time250 flights | 87.7% on time252 flights | 87.3% on time252 flights | 87.7% on time245 flights | 86.1% on time238 flights | 82.0% on time258 flights |
| 12 PM–1 PM | 86.8% on time244 flights | 94.1% on time221 flights | 89.3% on time207 flights | 87.7% on time237 flights | 89.4% on time240 flights | 87.6% on time194 flights | 83.9% on time243 flights |
| 1 PM–2 PM | 35 flights, too few to score | 39 flights, too few to score | 56 flights, too few to score | 47 flights, too few to score | 51 flights, too few to score | 41 flights, too few to score | 52 flights, too few to score |
| 2 PM–3 PM | 81 flights, too few to score | 53 flights, too few to score | 57 flights, too few to score | 78 flights, too few to score | 87 flights, too few to score | 71 flights, too few to score | 84 flights, too few to score |
| 3 PM–4 PM | 83.6% on time281 flights | 87.1% on time278 flights | 85.5% on time282 flights | 79.2% on time284 flights | 75.4% on time280 flights | 85.1% on time264 flights | 82.7% on time274 flights |
| 4 PM–5 PM | 78 flights, too few to score | 101 flights, too few to score | 88 flights, too few to score | 63 flights, too few to score | 73 flights, too few to score | 53 flights, too few to score | 52 flights, too few to score |
| 5 PM–6 PM | 80.8% on time220 flights | 82.6% on time208 flights | 80.5% on time205 flights | 79.3% on time203 flights | 80.6% on time223 flights | 76.4% on time123 flights | 77.4% on time201 flights |
| 6 PM–7 PM | 73.4% on time157 flights | 80.0% on time125 flights | 72.7% on time139 flights | 66.7% on time168 flights | 65.4% on time154 flights | 107 flights, too few to score | 78.1% on time151 flights |
| 7 PM–8 PM | 102 flights, too few to score | 114 flights, too few to score | 117 flights, too few to score | 76.6% on time125 flights | 93 flights, too few to score | 54 flights, too few to score | 118 flights, too few to score |
| 8 PM–9 PM | 100 flights, too few to score | 61 flights, too few to score | 63 flights, too few to score | 79 flights, too few to score | 103 flights, too few to score | 77 flights, too few to score | 80 flights, too few to score |
| 9 PM–10 PM | 105 flights, too few to score | 54 flights, too few to score | 50 flights, too few to score | 103 flights, too few to score | 110 flights, too few to score | 73.0% on time160 flights | 73.4% on time147 flights |
| 10 PM–11 PM | 73.9% on time158 flights | 84.0% on time125 flights | 80.8% on time135 flights | 78.4% on time136 flights | 82.0% on time161 flights | 49 flights, too few to score | 69.3% on time141 flights |
By departure window
By departure hour
- 12 AM to 4 AM: too few flights to score
- 5 AM: 94.7% on time from 478 flights
- 6 AM: 95.5% on time from 787 flights
- 7 AM: 90.9% on time from 962 flights
- 8 AM: 90.3% on time from 2,062 flights
- 9 AM: 93.4% on time from 493 flights
- 10 AM: 89.7% on time from 846 flights
- 11 AM: 86.8% on time from 1,737 flights
- 12 PM: 88.3% on time from 1,586 flights
- 1 PM: 81.9% on time from 321 flights
- 2 PM: 77.2% on time from 511 flights
- 3 PM: 82.6% on time from 1,943 flights
- 4 PM: 71.3% on time from 508 flights
- 5 PM: 79.9% on time from 1,383 flights
- 6 PM: 71.7% on time from 1,001 flights
- 7 PM: 75.6% on time from 723 flights
- 8 PM: 69.0% on time from 563 flights
- 9 PM: 72.7% on time from 729 flights
- 10 PM: 77.4% on time from 905 flights
- 11 PM: 81.6% on time from 240 flights
Why SLC → PHX runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for SLC → PHX. Only delays of 15 minutes or more are attributed.
Late-arriving aircraft is the largest cause on SLC → PHX, at 47.4%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 91.9% of the time and 6–9 PM departures 72.3%.
How this route holds up in bad weather
July 2023 – July 2026
The harder-hit end is PHX, where the flight lands. Its figure counts departures from PHX, so it says more about how that airport copes than about this route. Bad weather cancels 3.9 times the normal rate at PHX against barely any change at SLC. Cancelled in bad weather against normal hours: SLC 0.6% against 0.6%, PHX 2.5% against 0.6%. Flights that did leave PHX in bad weather arrived on time 53.7% of the time, against 80.6% in normal hours.
Bad weather and normal hours at the airports
Scheduled departures, July 2023 – July 2026| Departures from | SLC | PHX |
|---|---|---|
| Cancelled in bad weather | 0.6% | 2.5% |
| Cancelled in normal hours | 0.6% | 0.6% |
| Arrived on time, bad weather | 71.0% | 53.7% |
| Arrived on time, normal hours | 84.8% | 80.6% |
| Departures in bad weather | 20,014 | 6,215 |
Of the carriers on this route, SkyWest Airlines (0.4% cancelled against 0.7% for the other carriers at SLC) cancelled the fewest departures from SLC in bad weather and Frontier Airlines (1.9% cancelled against 0.6% for the other carriers at SLC) the most. One more carrier flies this route but has too few bad-weather departures from SLC to compare.
This route’s airlines in bad weather at SLC
All departures from SLC| Airline | Bad-weather departures | Cancelled | Other carriers |
|---|---|---|---|
| SkyWest Airlines | 5,888 | 0.4%below the others | 0.7% |
| Delta Air Lines | 9,247 | 0.5%about level | 0.7% |
| Southwest Airlines | 2,115 | 0.6%about level | 0.6% |
| American Airlines | 748 | 1.2%above the others | 0.6% |
| Frontier Airlines | 525 | 1.9%above the others | 0.6% |
These are airport figures, not route figures: every scheduled departure from SLC and PHX, to any destination, in hours the weather report called bad. The airline rows count each carrier’s departures from SLC on every route.
Weather source and limits. In full: SLC (airlines), PHX, What Weather Costs Each Airport, Who Cancels More When the Weather Turns, Airports That Change Places When Weather Turns.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| Southwest Airlines | 5,658 | 80.7% | 0.44% | -6 min | 5.2% |
| Delta Air Lines | 5,332 | 85.3% | 0.34% | -7 min | 4.4% |
| SkyWest Airlines | 3,269 | 87.7% | 0.09% | -9 min | 4.2% |
| Frontier Airlines | 2,016 | 79.8% | 1.44% | -11 min | 8.6% |
| American Airlines | 1,163 | 85.1% | 0.26% | -13 min | 5.3% |
| Envoy Air | 340 | 88.7% | 0.29% | -13 min | 3.0% |
Southwest Airlines flew 31.8% of the 17,778 flights listed. Frontier Airlines cancelled 1.44% of its flights here against 0.09% for SkyWest Airlines.
Envoy Air arrived on time 8.9 percentage points more often than Frontier Airlines on this route.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
DL1447 (8:20 AM) arrived on time 92.7% of the time, 10.7 points more often than DL1496 (10:50 PM) at 82.0%.
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Sunday the least, a gap of 5.1 percentage points.
By month
- Jan: 84.3%
- Feb: 83.1%
- Mar: 82.7%
- Apr: 84.3%
- May: 86.6%
- Jun: 80.6%
- Jul: 76.6%
- Aug: 82.7%
- Sep: 88.6%
- Oct: 83.9%
- Nov: 86.0%
- Dec: 85.8%
July is historically the weakest month and September the strongest, a spread of 12.0 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 71.7% from 397 flights
- August 2023: 80.3% from 405 flights
- September 2023: 87.6% from 411 flights
- October 2023: 83.2% from 448 flights
- November 2023: 89.9% from 508 flights
- December 2023: 85.5% from 528 flights
- January 2024: 78.4% from 502 flights
- February 2024: 81.5% from 461 flights
- March 2024: 79.4% from 522 flights
- April 2024: 87.4% from 510 flights
- May 2024: 84.6% from 529 flights
- June 2024: 82.0% from 443 flights
- July 2024: 75.6% from 443 flights
- August 2024: 82.0% from 480 flights
- September 2024: 90.1% from 465 flights
- October 2024: 88.9% from 488 flights
- November 2024: 89.2% from 499 flights
- December 2024: 84.3% from 541 flights
- January 2025: 87.9% from 491 flights
- February 2025: 82.8% from 471 flights
- March 2025: 81.0% from 595 flights
- April 2025: 82.1% from 511 flights
- May 2025: 90.1% from 496 flights
- June 2025: 81.1% from 428 flights
- July 2025: 79.3% from 431 flights
- August 2025: 85.9% from 429 flights
- September 2025: 87.8% from 413 flights
- October 2025: 79.4% from 476 flights
- November 2025: 78.5% from 478 flights
- December 2025: 87.7% from 514 flights
- January 2026: 86.7% from 490 flights
- February 2026: 85.0% from 488 flights
- March 2026: 87.5% from 582 flights
- April 2026: 83.6% from 522 flights
- May 2026: 85.4% from 501 flights
- June 2026: 78.8% from 435 flights
- July 2026: 79.4% from 447 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 83.9% against 84.9% in the 12 months before — broadly unchanged.
Data and methodology
Calculated by FlyerIntel from 17,778 SLC → PHX flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed