AS620
AS620 (Alaska Airlines) is a multi-stop service on 6 routes, busiest Seattle to Denver. Of 632 departures recorded from October 2024 to July 2026, 76.6% left on time, according to the US BTS.
- On-time departures76.6%of 632 flights
- Average delay11.8 min
- July 202631▼ 42.6%vs July 2025
- Cancelled1.1%
- Legs flown under this number6
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 10 | 25 | ▲ 150.0% |
| February | – | 11 | – |
| March | 22 | 13 | ▼ 40.9% |
| April | 45 | 27 | ▼ 40.0% |
| May | 14 | 31 | ▲ 121.4% |
| June | 32 | 29 | ▼ 9.4% |
| July | 54 | 31 | ▼ 42.6% |
| August | 44 | – | – |
| September | 30 | – | – |
| October | 47 | – | in progress |
| November | 9 | – | – |
| December | 11 | – | – |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 70.0% | 88.0% | ▲ 25.7% |
| February | – | 72.7% | – |
| March | 86.4% | 92.3% | ▲ 6.9% |
| April | 56.8% | 88.9% | ▲ 56.4% |
| May | 71.4% | 90.3% | ▲ 26.4% |
| June | 64.5% | 89.7% | ▲ 39.0% |
| July | 58.8% | 96.8% | ▲ 64.5% |
| August | 56.8% | – | – |
| September | 73.3% | – | – |
| October | 66.7% | – | in progress |
| November | 66.7% | – | – |
| December | 72.7% | – | – |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | – | 0 | – |
| March | 0 | 0 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 3 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 2 | – | in progress |
| November | 0 | – | – |
| December | 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 98.9% 625
- Cancelled 1.1% 7
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SEA DEN Seattle–Tacoma International Airport – Denver International Airport | 1,645 | 11.4 min | 74.9% | 262 |
| DEN SEA Denver International Airport – Seattle–Tacoma International Airport | 1,645 | 18.4 min | 67.6% | 183 |
| SMF SEA Sacramento International Airport – Seattle–Tacoma International Airport | 975 | 9.2 min | 87.3% | 79 |
| SFO SEA San Francisco International Airport – Seattle–Tacoma International Airport | 1,093 | -2.3 min | 98.0% | 51 |
| SAN MCO San Diego International Airport – Orlando International Airport | 3,452 | 8.1 min | 80.9% | 47 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 40 | 40 | 80.0% | 0 |
| November 2024 | 57 | 57 | 87.7% | 0 |
| December 2024 | 50 | 50 | 90.0% | 0 |
| January 2025 | 10 | 10 | 70.0% | 0 |
| March 2025 | 22 | 22 | 86.4% | 0 |
| April 2025 | 45 | 44 | 56.8% | 1 |
| May 2025 | 14 | 14 | 71.4% | 0 |
| June 2025 | 32 | 31 | 64.5% | 1 |
| July 2025 | 54 | 51 | 58.8% | 3 |
| August 2025 | 44 | 44 | 56.8% | 0 |
| September 2025 | 30 | 30 | 73.3% | 0 |
| October 2025 | 47 | 45 | 66.7% | 2 |
| November 2025 | 9 | 9 | 66.7% | 0 |
| December 2025 | 11 | 11 | 72.7% | 0 |
| January 2026 | 25 | 25 | 88.0% | 0 |
| February 2026 | 11 | 11 | 72.7% | 0 |
| March 2026 | 13 | 13 | 92.3% | 0 |
| April 2026 | 27 | 27 | 88.9% | 0 |
| May 2026 | 31 | 31 | 90.3% | 0 |
| June 2026 | 29 | 29 | 89.7% | 0 |
| July 2026 | 31 | 31 | 96.8% | 0 |