OO5559
OO5559 (SkyWest Airlines) is a multi-stop service on 20 routes, busiest Hayden to Denver. Of 609 departures recorded from October 2024 to July 2026, 78.6% left on time, according to the US BTS.
- On-time departures78.6%of 609 flights
- Average delay22.7 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.6%
- Legs flown under this number20
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 30 | 25 | ▼ 16.7% |
| February | 15 | 21 | ▲ 40.0% |
| March | 26 | 26 | 0.0% |
| April | 30 | 5 | ▼ 83.3% |
| May | 30 | 41 | ▲ 36.7% |
| June | 30 | 54 | ▲ 80.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 29 | – | in progress |
| November | 30 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 192 | 203 | ▲ 5.7% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 78.6% | 56.0% | ▼ 28.7% |
| February | 85.7% | 61.9% | ▼ 27.8% |
| March | 80.0% | 60.0% | ▼ 25.0% |
| April | 73.3% | 80.0% | ▲ 9.1% |
| May | 44.8% | 85.0% | ▲ 89.6% |
| June | 43.3% | 92.6% | ▲ 113.7% |
| July | 73.3% | 96.8% | ▲ 32.0% |
| August | 80.7% | – | – |
| September | 96.7% | – | – |
| October | 93.1% | – | in progress |
| November | 93.3% | – | – |
| December | 82.8% | – | – |
| Year-to-date average (Jan–Jul) | 68.4% | 76.0% | ▲ 11.1% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 0 | ▼ 100.0% |
| February | 1 | 0 | ▼ 100.0% |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 1 | 1 | 0.0% |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 6 | 2 | ▼ 66.7% |
according to the US BTS · October 2024 → July 2026
This is a historical record of departures already flown, not a forecast for your flight.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 98.4% 599
- Cancelled 1.6% 10
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| HDN DEN Yampa Valley Airport – Denver International Airport | 227 | 13.5 min | 77.7% | 276 |
| DEN GJT Denver International Airport – Grand Junction Regional Airport | 341 | -0.0 min | 93.1% | 72 |
| MKE ORD General Mitchell International Airport – Chicago O'Hare International Airport | 108 | 43.1 min | 69.8% | 45 |
| MRY LAX Monterey Regional Airport – Los Angeles International Airport | 429 | 2.0 min | 86.1% | 37 |
| COS DEN City of Colorado Springs Municipal Airport – Denver International Airport | 117 | -5.2 min | 94.1% | 34 |
| BIS DEN Bismarck Municipal Airport – Denver International Airport | 831 | 14.9 min | 61.3% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 30 | 29 | 93.1% | 1 |
| December 2024 | 15 | 14 | 57.1% | 1 |
| January 2025 | 30 | 28 | 78.6% | 2 |
| February 2025 | 15 | 14 | 85.7% | 1 |
| March 2025 | 26 | 25 | 80.0% | 1 |
| April 2025 | 30 | 30 | 73.3% | 0 |
| May 2025 | 30 | 29 | 44.8% | 1 |
| June 2025 | 30 | 30 | 43.3% | 0 |
| July 2025 | 31 | 30 | 73.3% | 1 |
| August 2025 | 31 | 31 | 80.7% | 0 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 29 | 29 | 93.1% | 0 |
| November 2025 | 30 | 30 | 93.3% | 0 |
| December 2025 | 29 | 29 | 82.8% | 0 |
| January 2026 | 25 | 25 | 56.0% | 0 |
| February 2026 | 21 | 21 | 61.9% | 0 |
| March 2026 | 26 | 25 | 60.0% | 1 |
| April 2026 | 5 | 5 | 80.0% | 0 |
| May 2026 | 41 | 40 | 85.0% | 1 |
| June 2026 | 54 | 54 | 92.6% | 0 |
| July 2026 | 31 | 31 | 96.8% | 0 |