PHX → SLC Flight Reliability

Right now

Origin · PHXNo disruption reported

Aviation weather is not currently a factor.

Updated 08:51 UTC

Phoenix airport profile →

Destination · SLCNo disruption reported

Aviation weather is not currently a factor.

Updated 08:54 UTC

Salt Lake City airport profile →

Route reliability

July 2023 – July 2026

Route Reliability Score

82/ 100Strong

Better than 91% of comparable major US routes (4,598 compared)

Calculated from 17,759 flights. How this is calculated

On-time arrivals

84.5%

14,944 of 17,682

Cancellation rate

0.36%

64 cancelled

Median arrival delay

-8 min

Average 1.4 min

Severe delays

4.6%

60+ minutes late

Delay when late

60 min

Average, when 15+ min late

Flights analyzed

17,759

6 carriers

PHX → SLC arrives on time 84.5% of the time; the return trip, SLC → PHX, arrives on time 83.7% of the time.

PHX → SLC spends 21.7 minutes on the ground on a 507-mile trip: 14.9 minutes from pushback to wheels-up at PHX and 6.7 minutes from touchdown to gate at SLC.

Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026

What stands out

This route holds up about the same all year, a steadier seasonal pattern than 98% of 3,357 comparable routes.

87.9% on time in its best month (November) against 79.7% in its worst (July).

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 3,357 in the comparison.

Why PHX → SLC flights are cancelled

July 2023 – July 2026

PHX → SLC cancelled 64 of 17,759 scheduled flights — about 1 in every 277. The reason filed most often was the airline, 75.0% of the cancellations coded on this route — about 1 in every 370 scheduled flights.

Share of cancellations

Airline75.0%

Weather17.2%

Air traffic7.8%

Security0.0%

Of 64 cancelled departures carrying a reason code.

What each reason means

The airline1 in 370

Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.

48 cancellations, 75.0% of the total.

Extreme weather1 in 1,614

Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.

11 cancellations, 17.2% of the total.

The air traffic system1 in 3,552

Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.

5 cancellations, 7.8% of the total.

Security—

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.

64 coded cancellations were recorded on PHX → SLC; the section appears from 50.

When it goes wrong

July 2023 – July 2026

One arrival in ten is worse than

27 min late

against a median of 8 min early

Arrived an hour or more late4.6%

Typical delay when late60 min

Cancelled0.36%

Landed somewhere else0.07%

Percentiles over 17,759 operations; cancelled and diverted flights are counted separately.

Will your connection be tight enough?

Layovers at SLC after arriving from PHX.

Connection buffer and chance of missing by layover length, PHX → SLC arrivals
Connection time	Chance of missing	Reads as
30 min	29%	High risk
45 min	15%	Some risk
60 min	9.1%	Some risk
90 min	4.5%	Low risk
120 min	2.6%	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 0.36% of the time and diverts 0.07% of the time, which a late arrival never shows up in.

Chance of missing is the share of 17,682 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 27 minutes late (90th-percentile gate arrival delay), over 17,759 operations.

Any other layover length: connection checker.

Best time to fly

PHX → SLC flights departing 5–9 AM arrived on time 93.5% of the time, against 67.8% for 9 PM–5 AM departures, a gap of 25.7 percentage points.

By day and hour

On-time arrival rate for each weekday and scheduled departure hour, in local time at the departure airport (PHX).

Hour of departure matters more than day of the week: hourly averages sit a typical 7.2 points from the route-wide rate, weekday averages 2.2 points.

On-time arrival rate for PHX to SLC by weekday and scheduled departure hour, local time. Each button reads out one slot.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
6 AM–7 AM
7 AM–8 AM
8 AM–9 AM
9 AM–10 AM
10 AM–11 AM
11 AM–12 PM
12 PM–1 PM
1 PM–2 PM
2 PM–3 PM
3 PM–4 PM
4 PM–5 PM
5 PM–6 PM
6 PM–7 PM
7 PM–8 PM
8 PM–9 PM
9 PM–10 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 10 PM (577 flights) are not drawn: no slot in those hours has enough flights to score.

View as tableHide table

On-time arrival rate (%) with flights beneath, by scheduled departure hour and weekday for PHX to SLC. A dash means fewer than 120 flights, which are not scored.
Hour	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
6 AM–7 AM	96.0% on time198 flights	97.8% on time185 flights	96.7% on time180 flights	94.8% on time211 flights	95.7% on time215 flights	96.7% on time210 flights	94.9% on time237 flights
7 AM–8 AM	93.8% on time144 flights	94.3% on time122 flights	95.3% on time130 flights	95.9% on time148 flights	95.6% on time137 flights	64 flights, too few to score	108 flights, too few to score
8 AM–9 AM	90.4% on time220 flights	90.1% on time223 flights	92.3% on time221 flights	90.3% on time216 flights	89.2% on time212 flights	91.0% on time223 flights	86.6% on time216 flights
9 AM–10 AM	87.7% on time180 flights	94.0% on time168 flights	92.9% on time158 flights	87.3% on time182 flights	91.8% on time183 flights	89.5% on time144 flights	90.4% on time166 flights
10 AM–11 AM	89.1% on time140 flights	90.5% on time138 flights	88.7% on time134 flights	87.4% on time135 flights	87.0% on time147 flights	93.5% on time126 flights	90.5% on time137 flights
11 AM–12 PM	106 flights, too few to score	104 flights, too few to score	103 flights, too few to score	112 flights, too few to score	105 flights, too few to score	115 flights, too few to score	114 flights, too few to score
12 PM–1 PM	107 flights, too few to score	96 flights, too few to score	102 flights, too few to score	108 flights, too few to score	81.8% on time121 flights	92 flights, too few to score	109 flights, too few to score
1 PM–2 PM	83.3% on time241 flights	87.3% on time237 flights	90.8% on time241 flights	86.0% on time223 flights	85.4% on time241 flights	83.6% on time233 flights	82.8% on time211 flights
2 PM–3 PM	85.3% on time137 flights	85.3% on time150 flights	79.6% on time152 flights	83.1% on time148 flights	84.3% on time136 flights	87.1% on time124 flights	76.9% on time144 flights
3 PM–4 PM	75.0% on time160 flights	85.3% on time144 flights	81.7% on time153 flights	80.2% on time167 flights	75.2% on time153 flights	111 flights, too few to score	76.9% on time148 flights
4 PM–5 PM	104 flights, too few to score	102 flights, too few to score	85 flights, too few to score	81 flights, too few to score	109 flights, too few to score	77.8% on time126 flights	106 flights, too few to score
5 PM–6 PM	73.8% on time272 flights	88.8% on time224 flights	86.0% on time217 flights	79.6% on time257 flights	76.1% on time266 flights	83.5% on time244 flights	74.0% on time243 flights
6 PM–7 PM	79.9% on time170 flights	83.7% on time135 flights	85.4% on time158 flights	79.9% on time164 flights	76.5% on time170 flights	82.1% on time156 flights	79.4% on time167 flights
7 PM–8 PM	83.8% on time142 flights	84.3% on time179 flights	81.1% on time186 flights	75.9% on time145 flights	80.0% on time145 flights	59 flights, too few to score	73.4% on time158 flights
8 PM–9 PM	71.1% on time142 flights	78.7% on time127 flights	78.3% on time143 flights	71.1% on time128 flights	70.6% on time126 flights	77 flights, too few to score	119 flights, too few to score
9 PM–10 PM	115 flights, too few to score	67 flights, too few to score	63 flights, too few to score	65.6% on time122 flights	116 flights, too few to score	43 flights, too few to score	118 flights, too few to score

By departure window

5–9 AM93.5%

9 AM–12 PM88.6%

12–3 PM85.0%

3–6 PM79.3%

6–9 PM78.7%

9 PM–5 AM67.8%

By departure hour

12 AM

3 AM

6 AM

9 AM

12 PM

3 PM

6 PM

9 PM

Why PHX → SLC runs late

July 2023 – July 2026

Late-arriving aircraft51.4%

the inbound aircraft was late, so this flight started late

The airline40.2%

crew, maintenance, boarding and fueling, all within the carrier’s control

Air traffic control6.1%

airspace and airport capacity, including weather-driven flow control

Weather2.2%

weather severe enough to stop this flight specifically

Security0.1%

screening or terminal security incidents

Share of the delay minutes US DOT attributed to each cause for PHX → SLC. Only delays of 15 minutes or more are attributed.

Late-arriving aircraft is the largest cause on PHX → SLC, at 51.4%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 93.5% of the time and 9 PM–5 AM departures 67.8%.

How this route holds up in bad weather

July 2023 – July 2026

The harder-hit end is the one the flight leaves from, where a cancellation keeps it from departing at all. Bad weather cancels 3.9 times the normal rate at PHX against barely any change at SLC. Cancelled in bad weather against normal hours: PHX 2.5% against 0.6%, SLC 0.6% 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 PHX and SLC in hours of bad weather and in normal hours
Departures from	PHX	SLC
Cancelled in bad weather	2.5%	0.6%
Cancelled in normal hours	0.6%	0.6%
Arrived on time, bad weather	53.7%	71.0%
Arrived on time, normal hours	80.6%	84.8%
Departures in bad weather	6,215	20,014

These are airport figures, not route figures: every scheduled departure from PHX and SLC, to any destination, in hours the weather report called bad.

Weather source and limits. In full: PHX, SLC, 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.

Airlines on this route
Carrier	Flights	On time	Cancelled	Median delay	Severe
Southwest Airlines	5,639	78.9%	0.30%	-4 min	4.7%
Delta Air Lines	5,332	89.4%	0.43%	-11 min	3.9%
SkyWest Airlines	3,268	85.4%	0.09%	-8 min	4.9%
Frontier Airlines	2,017	84.5%	0.99%	-11 min	5.6%
American Airlines	1,163	85.9%	0.09%	-8 min	5.3%
Envoy Air	340	87.6%	0.00%	-4 min	2.9%

Southwest Airlines flew 31.8% of the 17,759 flights listed.

Delta Air Lines arrived on time 10.5 percentage points more often than Southwest Airlines on this route.

Flights on this route

Flight numbers with at least 600 operations here and still on the schedule.

Flights on this route
Flight	Scheduled	Operations	On time
DL1535 Delta Air Lines	6:00 AM	785	96.8%
F91440 Frontier Airlines	6:40 AM	760	90.5%

Weekly and seasonal patterns

By day of week

Mon83.3%

Tue87.7%

Wed87.4%

Thu83.4%

Fri82.9%

Sat86.1%

Sun81.4%

Tuesday is historically the most reliable day and Sunday the least, a gap of 6.3 percentage points.

By month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

July is historically the weakest month and November the strongest, a spread of 8.2 percentage points.

Reliability over time

July 2023 – July 2026

24

25

26

Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 83.0% against 85.1% in the 12 months before — declining by 2.1 percentage points.

Data and methodology

Calculated by FlyerIntel from 17,759 PHX → SLC 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

Analysis last recomputed September 26, 2026

PHX airport SLC airport Return direction SLC → PHX

PHX→SLC

Right now

Route reliability

What stands out

Why PHX → SLC flights are cancelled

Share of cancellations

What each reason means

When it goes wrong

Will your connection be tight enough?

Best time to fly

By day and hour

By departure window

By departure hour

Why PHX → SLC runs late

How this route holds up in bad weather

Bad weather and normal hours at the airports

Airlines on this route

Flights on this route

Weekly and seasonal patterns

By day of week

By month

Reliability over time

Data and methodology