Airlines › SkyWest Airlines
Reporting carrier · 12 months to July 2026
SkyWest Airlines: on-time performance
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report. Data through July 2026.
In the 12 months to July 2026, SkyWest Airlines (BTS code OO) reported 854,130 scheduled domestic flights across 1,811 routes and 275 airports. It is a regional carrier that operates flights sold by Alaska, American, Delta and United.
77.4% of its flights arrived on time, 1.4 points above the 76.0% recorded for all reporting carriers together. 1.8% were cancelled (all carriers: 1.8%) and 0.3% diverted; flights that arrived were 9.6 min late on average.
Its busiest airports by departures are Chicago (ORD, 9% of departures), Denver (DEN, 9% of departures) and Los Angeles (LAX, 5% of departures).
The on-time share is down 1.4 points on the previous 12 months (78.8%); the cancellation share moved from 1.1% to 1.8%.
Of the delay minutes that carriers assigned to a BTS cause category on its flights, air carrier 47%, late-arriving aircraft 22% and national aviation system 17%.
- On time 77.4%
- Arrived 15+ minutes late 20.5%
- Cancelled 1.8%
- Diverted 0.3%
Against all reporting carriers
| Measure | SkyWest Airlines | All reporting carriers | OO, previous 12 months |
|---|---|---|---|
| Arrived on time | 77.4% | 76.0% | 78.8% |
| Departed on time | 79.5% | 76.1% | 81.1% |
| Arrived 15+ minutes late | 20.5% | 21.9% | 19.8% |
| Cancelled | 1.8% | 1.8% | 1.1% |
| Diverted | 0.3% | 0.3% | 0.3% |
| Average arrival delay | 9.6 min | 8.1 min | 8.1 min |
| Arrival delay minutes per 100 flights | 1,890 | 1,684 | 1,688 |
| Scheduled flights | 854,130 | 7,043,858 | 817,912 |
By on-time share, SkyWest Airlines is 5 of 13 reporting carriers in the 12 months to July 2026; the full table is on the airline on-time ranking. Year on year: −1.4 pts on time.
Month by month
Busiest airports
| Airport | Departures | Share of carrier | On time | Avg arrival delay | Cancelled | Airport, all carriers |
|---|---|---|---|---|---|---|
| ORD Chicago | 78,162 | 9.2% | 63.6% | 23.1 min | 4.1% | 69.4% |
| DEN Denver | 75,286 | 8.8% | 79.3% | 6.5 min | 1.0% | 76.1% |
| LAX Los Angeles | 40,763 | 4.8% | 84.3% | 0.7 min | 0.6% | 79.0% |
| SLC Salt Lake City | 36,266 | 4.2% | 89.8% | -3.8 min | 0.4% | 83.8% |
| SFO San Francisco | 31,692 | 3.7% | 74.0% | 11.4 min | 1.3% | 75.6% |
| SEA Seattle | 28,770 | 3.4% | 84.9% | 0.3 min | 0.7% | 78.6% |
| DTW Detroit | 28,582 | 3.3% | 72.5% | 17.9 min | 2.1% | 75.4% |
| MSP Minneapolis | 27,841 | 3.3% | 78.6% | 8.5 min | 1.5% | 78.1% |
| PHX Phoenix | 27,294 | 3.2% | 79.8% | 7.2 min | 0.8% | 77.4% |
| DFW Dallas/Fort Worth | 22,633 | 2.6% | 74.4% | 9.6 min | 3.1% | 69.9% |
| SAN San Diego | 14,881 | 1.7% | 77.4% | 3.5 min | 1.9% | 76.1% |
| IAH Houston | 14,030 | 1.6% | 76.0% | 13.5 min | 1.0% | 77.6% |
| PDX Portland | 10,528 | 1.2% | 85.1% | 1.4 min | 0.6% | 82.0% |
| BOI Boise | 10,509 | 1.2% | 84.8% | 0.2 min | 0.4% | 82.9% |
| SMF Sacramento | 8,910 | 1% | 82.3% | 2.3 min | 0.8% | 81.4% |
| AUS Austin | 8,262 | 1% | 79.8% | 6.8 min | 0.8% | 75.5% |
| TUS Tucson | 8,214 | 1% | 83.7% | 2.4 min | 0.5% | 82.6% |
| ASE Aspen | 8,072 | 0.9% | 66.5% | 20.4 min | 5.9% | 66.5% |
| OKC Oklahoma City | 7,865 | 0.9% | 80.3% | 6.4 min | 1.5% | 79.7% |
| MKE Milwaukee | 7,436 | 0.9% | 69.7% | 18.6 min | 3.2% | 76.2% |
| FAT Fresno | 7,047 | 0.8% | 81.5% | 4.7 min | 0.9% | 80.6% |
| ATL Atlanta | 6,955 | 0.8% | 72.6% | 21.1 min | 2.4% | 76.6% |
| SJC San Jose | 6,777 | 0.8% | 87.2% | -3.8 min | 0.5% | 81.9% |
| GEG Spokane | 6,535 | 0.8% | 84.6% | 0.4 min | 0.8% | 83.8% |
| PSP Palm Springs | 5,880 | 0.7% | 77.7% | 6.2 min | 0.9% | 78.5% |
The 25 airports with the most OO departures of 275 served. On time means the flight reached its destination less than 15 minutes late; the pill is green when the carrier is at or above the figure for all carriers' departures from that airport (last column).
Busiest routes
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| ORD–MKE | Chicago to Milwaukee | 5,000 | 61.4% | 26.7 min | 4.8% |
| MKE–ORD | Milwaukee to Chicago | 4,999 | 65.4% | 22.2 min | 4.3% |
| SNA–SFO | Santa Ana to San Francisco | 3,575 | 66.8% | 12.1 min | 1.8% |
| SFO–SNA | San Francisco to Santa Ana | 3,515 | 77.1% | 5.8 min | 1.6% |
| LAX–SMF | Los Angeles to Sacramento | 3,509 | 87.1% | 0.2 min | 0.4% |
| SMF–LAX | Sacramento to Los Angeles | 3,509 | 89.3% | -1.6 min | 0.4% |
| PDX–SEA | Portland to Seattle | 3,504 | 85.6% | -0.9 min | 0.6% |
| SEA–PDX | Seattle to Portland | 3,377 | 85.5% | 0.1 min | 0.5% |
| COS–DEN | Colorado Springs to Denver | 3,300 | 81.8% | 1.9 min | 1.5% |
| DEN–COS | Denver to Colorado Springs | 3,300 | 75.6% | 8.5 min | 1.5% |
| SEA–BOI | Seattle to Boise | 2,958 | 87.0% | -2.4 min | 0.2% |
| SEA–GEG | Seattle to Spokane | 2,956 | 86.7% | -2.6 min | 1.1% |
| GEG–SEA | Spokane to Seattle | 2,918 | 87.0% | -1.7 min | 1.1% |
| BOI–SEA | Boise to Seattle | 2,838 | 85.8% | -3.4 min | 0.3% |
| ASE–DEN | Aspen to Denver | 2,725 | 72.4% | 13.9 min | 5.0% |
| ORD–SBN | Chicago to South Bend | 2,725 | 60.8% | 25.9 min | 4.5% |
| SBN–ORD | South Bend to Chicago | 2,725 | 63.4% | 26.6 min | 3.9% |
| DEN–ASE | Denver to Aspen | 2,724 | 69.7% | 16.5 min | 5.1% |
| LAX–PHX | Los Angeles to Phoenix | 2,638 | 86.5% | -0.7 min | 0.7% |
| PHX–LAX | Phoenix to Los Angeles | 2,638 | 89.1% | -2.1 min | 0.7% |
| CPR–DEN | Casper to Denver | 2,600 | 82.1% | 2.8 min | 0.8% |
| DEN–CPR | Denver to Casper | 2,600 | 76.8% | 10.5 min | 0.8% |
| LAX–SFO | Los Angeles to San Francisco | 2,573 | 68.3% | 12.1 min | 1.2% |
| SFO–LAX | San Francisco to Los Angeles | 2,568 | 74.5% | 9.0 min | 1.1% |
| ORD–DTW | Chicago to Detroit | 2,531 | 62.3% | 26.4 min | 3.6% |
The 25 routes with the most OO flights of 1,811 flown. Figures are for this carrier's flights only; the route pages compare every carrier on the route.
By scheduled departure hour
Delay causes and cancellations
Cancellations by reported reason (15,226 in the period): air carrier 4%, weather 78%, national aviation system 18%, security 0%.
Questions and answers
What is SkyWest Airlines's on-time performance?
77.4% of 854,130 scheduled domestic flights in the 12 months to July 2026 arrived less than 15 minutes late. All reporting carriers together recorded 76.0%.
How often does SkyWest Airlines cancel flights?
1.8% of its scheduled domestic flights were cancelled in the period, against 1.8% for all reporting carriers.
What causes SkyWest Airlines delays?
For flights that arrived 15 or more minutes late, the carrier attributed the delay minutes as follows: air carrier 47%, late-arriving aircraft 22%, national aviation system 17%, extreme weather 14%, security 0%. Carriers assign these categories themselves under BTS rules.
At which airports does SkyWest Airlines have its highest on-time share?
Among its 25 busiest airports with at least 600 departures, flights leaving Salt Lake City (SLC) had the highest on-time arrival share at 89.8%, and those leaving Chicago (ORD) the lowest at 63.6%.
What time of day has the highest on-time share?
Its flights scheduled to depart from 5 am to 6 am local time arrived on time 87.7% of the time; those scheduled from 6 pm to 7 pm did so 70.3% of the time.
Is it getting better?
The on-time share for the 12 months to July 2026 was 77.4%, down 1.4 points on the previous 12 months (78.8%).
Why are some airlines missing?
Only carriers with at least 0.5 percent of domestic scheduled passenger revenue must report on-time data to BTS. Smaller carriers, charter operators and foreign airlines are not in the files, and flights to or from other countries are not covered.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987 to present), monthly files August 2023 to July 2026; carrier name from the BTS unique carrier lookup. US government works in the public domain. The carrier code is the BTS reporting-carrier code, which identifies the company that operated the flight, not the brand it was sold under. Totals and averages only. See the methodology and which airlines report.