Carrier performance at one airport
OO→PHX
SkyWest Airlines at Phoenix Sky Harbor International
- Departures
- 27,166
- Period
- June 2025 to May 2026
- Routes
- 25
- Rank here
- #5 of 9
SkyWest Airlines at Phoenix lands a B+, 4 points better than the national rate of 77.4%. About one flight in five arrive 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 27,166 flights, of which Delta Air Lines flew 10,708 at 86.6% on time.
Measured against the airport rather than the country, SkyWest Airlines runs 2 points ahead of the 79.1% weighted average across all carriers at PHX. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.
Key figures
On time
81.3%
26,866 completed departures
Avg delay
78 min
Across delayed flights only
Cancelled
0.80%
At PHX, this carrier only
Rank here
#5
Of 9 carriers clearing the floor at PHX
These figures cover 27,000 flights between June 2025 and May 2026. The median arrival is 7 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.
Against the competition
Every carrier at PHX, ranked
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 86.6% of the time; JetBlue Airways manages 70.6%. Sample sizes sit next to every figure, because a two-point gap across 1,139 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 10,708 | 86.6% | 84 min | 1.06% | A |
| Envoy Air | 9,964 | 85.3% | 49 min | 0.70% | A+ |
| Alaska Airlines | 5,615 | 85.1% | 56 min | 0.68% | A+ |
| United Airlines | 10,185 | 81.5% | 77 min | 0.79% | B+ |
| SkyWest Airlines (this page) | 27,166 | 81.3% | 78 min | 0.80% | B+ |
| American Airlines | 56,179 | 79.4% | 70 min | 1.13% | B |
| Frontier Airlines | 7,555 | 79.0% | 84 min | 1.28% | B |
| Southwest Airlines | 67,877 | 75.1% | 49 min | 0.65% | B+ |
| JetBlue Airways | 1,139 | 70.6% | 68 min | 2.37% | C |
The spread between Delta and JetBlue is 16 points, wide enough that it should decide the booking. On a hundred trips that is 16 more arrivals inside the on-time window.
Route by route
Where SkyWest Airlines flies from PHX
SkyWest Airlines operates 25 routes out of PHX with enough volume to report. Route records inside one carrier at one airport still spread widely, because a short shuttle and a transcontinental have very different exposure to a late inbound.
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| PHX to LAX · Los Angeles | 2,580 | 90.5% | 67 min | 0.74% | A+ |
| PHX to TUS · Tucson | 2,257 | 81.8% | 84 min | 0.53% | B+ |
| PHX to FLG · Flagstaff | 1,204 | 76.5% | 118 min | 1.58% | B |
| PHX to SLC · Salt Lake City | 1,115 | 83.4% | 63 min | 0.27% | B+ |
| PHX to YUM · Yuma | 1,028 | 83.3% | 79 min | 0.49% | B+ |
| PHX to BOI · Boise | 1,006 | 84.5% | 65 min | 0.60% | B+ |
| PHX to DRO · Durango | 989 | 80.6% | 83 min | 0.40% | B+ |
| PHX to GJT · Grand Junction | 944 | 82.6% | 72 min | 0.32% | B+ |
| PHX to MRY · Monterey | 911 | 78.0% | 77 min | 0.88% | B+ |
| PHX to SGU · St. George | 887 | 84.6% | 81 min | 0.11% | B+ |
| PHX to ELP · El Paso | 858 | 81.3% | 80 min | 0.82% | B+ |
| PHX to OKC · Oklahoma City | 839 | 75.3% | 74 min | 0.60% | B+ |
| PHX to BFL · Bakersfield | 787 | 79.9% | 86 min | 2.41% | B |
| PHX to PSP · Palm Springs | 730 | 76.9% | 67 min | 1.23% | B |
| PHX to ABQ · Albuquerque | 723 | 85.1% | 72 min | 0.55% | A+ |
| PHX to PSC · Pasco | 693 | 85.9% | 80 min | 0.00% | A+ |
| PHX to SEA · Seattle | 547 | 82.8% | 60 min | 0.55% | B+ |
| PHX to FAT · Fresno | 545 | 75.5% | 81 min | 0.18% | B+ |
| PHX to BUR · Burbank | 542 | 80.6% | 88 min | 0.92% | B+ |
| PHX to SFO · San Francisco | 518 | 72.9% | 67 min | 0.19% | C+ |
| PHX to MFR · Medford | 515 | 81.5% | 72 min | 0.19% | B+ |
| PHX to SAF · Santa Fe | 514 | 82.4% | 96 min | 0.58% | B+ |
| PHX to CID · Cedar Rapids | 462 | 75.4% | 80 min | 1.30% | B |
| PHX to SBP · San Luis Obispo | 411 | 76.6% | 64 min | 0.97% | B+ |
| PHX to TUL · Tulsa | 408 | 79.3% | 93 min | 0.25% | B+ |
Departure window
Best time of day for this operation
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 12 points, against 16 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am1,608 flights89.7%
- 8am–11am7,133 flights83.3%
- 11am–2pm3,683 flights82.7%
- 2pm–5pm5,435 flights80.6%
- 5pm–8pm4,431 flights78.7%
- 8pm–5am4,876 flights77.5%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 89.7% of the time, against 77.5% for the overnight window. That is 12 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on.
Across the year
Seasonal pattern
February is the weak month at 78.4% on time, against 85.9% in August. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days.
Delay causes
What holds this operation up
- 58%Carrier
- 27%Late-arriving aircraft
- 8%National Airspace System
- 7%Extreme weather
- 0%Security
The largest share of delay minutes, 58%, 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 230,000 of the 394,000 delay minutes reported here.
Cancellations are rare at 0.80%, below the national 1.80% 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.
7.2% of arrivals land an hour or more late, close to the national 8.2%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route are the a little over an hour kind, which a normal layover absorbs.
27,166 flights sit behind these numbers, which is a large enough sample that the headline rate is not moving on noise. Where a sub-group falls below 30 flights the site shows a dash instead of a percentage.
Put together: avoid the 8pm–5am departure. It runs 77.5% on time against 89.7% for the 5am–8am slot, and that 12 points is the largest single thing you control here. Delta Air Lines is the strongest operator if the fares are close.
Common questions
SkyWest Airlines at PHX
How often is SkyWest Airlines at PHX delayed?
About one flight in five arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 18.7% of the 27,166 flights in this analysis, against 22.6% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on SkyWest Airlines at PHX?
Delta Air Lines leads at 86.6% on time across 10,708 flights. JetBlue Airways is at the other end on 70.6%, a gap of 16 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on SkyWest Airlines at PHX?
The 5am–8am departure window is the strongest at 89.7% on time. The 8pm–5am window is the weakest at 77.5%, 12 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 February delays on SkyWest Airlines at PHX?
February is the weakest month at 78.4% on time, compared with 85.9% in August. Across the year that is 8 points between the best and worst months. The seasonal swing is modest enough that it should not decide when you travel.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, June 2025 to May 2026. Updated monthly. How this data is collected.