Carrier performance at one airport
OO→PHX
SkyWest Airlines at Phoenix Sky Harbor International
- Departures
- 27,507
- Period
- September 2025 to August 2026
- Routes
- 25
- Rank here
- #4 of 9
SkyWest Airlines at Phoenix lands a B+, 3 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 27,507 flights, of which Delta Air Lines flew 10,637 at 86.1% on time.
Measured against the airport rather than the country, SkyWest Airlines runs 2 points ahead of the 77.9% 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
80.3%
27,192 completed departures
Avg delay
78 min
Across delayed flights only
Cancelled
0.84%
At PHX, this carrier only
Rank here
#4
Of 9 carriers clearing the floor at PHX
These figures cover 28,000 flights between September 2025 and August 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 86.1% of the time; JetBlue Airways manages 70.2%. Sample sizes sit next to every figure, because a two-point gap across 1,102 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 10,637 | 86.1% | 86 min | 1.14% | A |
| Alaska Airlines | 5,685 | 84.9% | 54 min | 0.62% | B+ |
| Envoy Air | 11,150 | 84.0% | 50 min | 0.61% | B+ |
| SkyWest Airlines (this page) | 27,507 | 80.3% | 78 min | 0.84% | B+ |
| United Airlines | 10,074 | 80.3% | 77 min | 0.78% | B+ |
| Frontier Airlines | 7,636 | 78.9% | 82 min | 1.18% | B |
| American Airlines | 56,697 | 78.5% | 71 min | 1.13% | B |
| Southwest Airlines | 66,973 | 73.2% | 49 min | 0.61% | C+ |
| JetBlue Airways | 1,102 | 70.2% | 77 min | 3.27% | C− |
JetBlue Airways cancels 3.3% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
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 | 2,677 | 90.0% | 68 min | 0.71% | A+ |
| PHX to TUS · Tucson | 2,227 | 81.0% | 87 min | 0.49% | B+ |
| PHX to SLC · Salt Lake City | 1,222 | 81.6% | 69 min | 0.25% | B+ |
| PHX to FLG · Flagstaff | 1,215 | 78.2% | 103 min | 2.72% | B |
| PHX to BOI · Boise | 1,029 | 85.0% | 71 min | 0.49% | A+ |
| PHX to YUM · Yuma | 1,015 | 82.4% | 82 min | 0.39% | B+ |
| PHX to DRO · Durango | 987 | 78.8% | 89 min | 0.41% | B+ |
| PHX to GJT · Grand Junction | 948 | 80.9% | 75 min | 0.53% | B+ |
| PHX to BFL · Bakersfield | 930 | 80.6% | 85 min | 2.04% | B |
| PHX to MRY · Monterey | 889 | 78.7% | 71 min | 0.56% | B+ |
| PHX to SGU · St. George | 889 | 83.1% | 78 min | 0.11% | B+ |
| PHX to OKC · Oklahoma City | 833 | 76.3% | 78 min | 0.60% | B+ |
| PHX to ELP · El Paso | 773 | 81.2% | 80 min | 0.91% | B+ |
| PHX to PSC · Pasco | 694 | 85.1% | 85 min | 0.14% | A+ |
| PHX to PSP · Palm Springs | 684 | 75.8% | 82 min | 1.17% | B |
| PHX to ABQ · Albuquerque | 622 | 85.8% | 67 min | 0.64% | A+ |
| PHX to SAN · San Diego | 593 | 63.9% | 51 min | 5.06% | D− |
| PHX to SFO · San Francisco | 572 | 63.7% | 67 min | 0.17% | D+ |
| PHX to BUR · Burbank | 554 | 79.8% | 84 min | 0.72% | B+ |
| PHX to FAT · Fresno | 535 | 76.3% | 77 min | 0.19% | B+ |
| PHX to MFR · Medford | 516 | 78.2% | 81 min | 0.19% | B+ |
| PHX to SAF · Santa Fe | 514 | 79.5% | 97 min | 0.58% | B+ |
| PHX to CID · Cedar Rapids | 414 | 73.2% | 69 min | 1.45% | C |
| PHX to SEA · Seattle | 409 | 83.0% | 63 min | 0.49% | B+ |
| PHX to SBA · Santa Barbara | 408 | 82.7% | 68 min | 0.98% | B+ |
Flight by flight
SkyWest Airlines flight numbers from PHX
10 SkyWest Airlines flight numbers leaving PHX flew their main route often enough to have a record of their own. Grouped by destination.
Departure window
Best time of day for this operation
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 28,000 flights.
- 5am–8am1,482 flights86.0%
- 8am–11am7,218 flights82.7%
- 11am–2pm4,097 flights82.0%
- 2pm–5pm5,419 flights79.8%
- 5pm–8pm4,710 flights77.0%
- 8pm–5am4,581 flights77.1%
Scale runs 70% to 90%.
Book the early departure. Flights leaving between 5am–8am arrive on time 86.0% of the time, against 77.0% for the evening window. That is 9 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 7,218 flights scheduled in it.
Across the year
Seasonal pattern
June is the worst month at 75.9% on time, 8 points below September, the best at 84.1%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. March was the busiest month here, with 3,058 flights.
Delay causes
What holds this operation up
- 52%Carrier
- 31%Late-arriving aircraft
- 10%National Airspace System
- 7%Extreme weather
- 0%Security
The largest share of delay minutes, 52%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 219,000 of the 420,000 delay minutes reported here. The split is drawn from 419,726 reported delay minutes.
Cancellations are rare at 0.84%, below the national 1.89% 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.
7.6% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
27,507 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: take the 5am–8am departure, avoid June if the dates are flexible, and if two carriers are within a few dollars of each other, Delta is the one with the record behind it. None of that guarantees an on-time arrival; it moves the odds by 16 points, which is the most any booking decision can do. 27,192 completed flights over 12 months sit behind that.
Common questions
SkyWest Airlines at PHX
How often is SkyWest Airlines at PHX delayed?
About one flight in five arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 19.7% of the 27,507 flights in this analysis, against 22.7% 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 86.1% on time across 10,637 flights. JetBlue Airways is at the other end on 70.2%, 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 86.0% on time. The 5pm–8pm window is the weakest at 77.0%, 9 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 June delays on SkyWest Airlines at PHX?
June is the weakest month at 75.9% on time, compared with 84.1% in September. Across the year that is 8 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- SkyWest Airlines network-wide record
- Phoenix Sky Harbor International (PHX) all carriers
- PHX to LAX route record90.0%
- PHX to TUS route record81.0%
- PHX to SLC route record81.6%
- PHX to FLG route record78.2%
- Do airlines run better at their own hubs?
- Denver, Salt Lake City, Phoenix and Las Vegas: the Mountain West hubs
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.