OO4031
OO4031 (SkyWest Airlines) is a multi-stop service on 3 routes, busiest Ontario to Seattle. Of 1,193 departures recorded from October 2024 to July 2026, 90.4% left on time, according to the US BTS.
- On-time departures90.4%of 1,193 flights
- Average delay0.2 min
- July 202660▲ 3.4%vs July 2025
- Cancelled0.3%
- Legs flown under this number3
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 | 54 | 54 | 0.0% |
| February | 56 | 39 | ▼ 30.4% |
| March | 62 | 55 | ▼ 11.3% |
| April | 60 | 60 | 0.0% |
| May | 62 | 62 | 0.0% |
| June | 60 | 60 | 0.0% |
| July | 58 | 60 | ▲ 3.4% |
| August | 62 | – | – |
| September | 60 | – | – |
| October | 62 | – | in progress |
| November | 58 | – | – |
| December | 38 | – | – |
| Year to date (Jan–Jul) | 412 | 390 | ▼ 5.3% |
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 | 88.7% | 92.6% | ▲ 4.4% |
| February | 80.4% | 92.3% | ▲ 14.9% |
| March | 96.8% | 90.6% | ▼ 6.4% |
| April | 100.0% | 90.0% | ▼ 10.0% |
| May | 91.9% | 87.1% | ▼ 5.3% |
| June | 91.7% | 86.7% | ▼ 5.5% |
| July | 79.3% | 76.7% | ▼ 3.3% |
| August | 93.6% | – | – |
| September | 95.0% | – | – |
| October | 95.2% | – | in progress |
| November | 86.2% | – | – |
| December | 94.7% | – | – |
| Year-to-date average (Jan–Jul) | 89.8% | 88.0% | ▼ 2.0% |
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 | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 2 | ▲ 100.0% |
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 99.7% 1,190
- Cancelled 0.3% 3
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
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ONT SEA Ontario International Airport – Seattle–Tacoma International Airport | 1,540 | 0.0 min | 90.8% | 597 |
| SEA ONT Seattle–Tacoma International Airport – Ontario International Airport | 1,540 | 0.2 min | 90.2% | 595 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 48 | 48 | 97.9% | 0 |
| December 2024 | 43 | 43 | 90.7% | 0 |
| January 2025 | 54 | 53 | 88.7% | 1 |
| February 2025 | 56 | 56 | 80.4% | 0 |
| March 2025 | 62 | 62 | 96.8% | 0 |
| April 2025 | 60 | 60 | 100.0% | 0 |
| May 2025 | 62 | 62 | 91.9% | 0 |
| June 2025 | 60 | 60 | 91.7% | 0 |
| July 2025 | 58 | 58 | 79.3% | 0 |
| August 2025 | 62 | 62 | 93.6% | 0 |
| September 2025 | 60 | 60 | 95.0% | 0 |
| October 2025 | 62 | 62 | 95.2% | 0 |
| November 2025 | 58 | 58 | 86.2% | 0 |
| December 2025 | 38 | 38 | 94.7% | 0 |
| January 2026 | 54 | 54 | 92.6% | 0 |
| February 2026 | 39 | 39 | 92.3% | 0 |
| March 2026 | 55 | 53 | 90.6% | 2 |
| April 2026 | 60 | 60 | 90.0% | 0 |
| May 2026 | 62 | 62 | 87.1% | 0 |
| June 2026 | 60 | 60 | 86.7% | 0 |
| July 2026 | 60 | 60 | 76.7% | 0 |