AS434
AS434 (Alaska Airlines) is a multi-stop service on 7 routes, busiest San Francisco to Dulles. Of 381 departures recorded from October 2024 to July 2026, 73.0% left on time, according to the US BTS.
- On-time departures73.0%of 381 flights
- Average delay15.2 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.0%
- Legs flown under this number7
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 5 | 6 | ▲ 20.0% |
| February | – | – | – |
| March | 13 | 14 | ▲ 7.7% |
| April | 29 | 21 | ▼ 27.6% |
| May | 29 | 19 | ▼ 34.5% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 19 | – | – |
| September | – | – | – |
| October | 1 | – | in progress |
| November | – | – | – |
| December | 30 | – | – |
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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 60.0% | 33.3% | ▼ 44.5% |
| February | – | – | – |
| March | 92.3% | 85.7% | ▼ 7.1% |
| April | 93.1% | 95.2% | ▲ 2.3% |
| May | 86.2% | 63.2% | ▼ 26.7% |
| June | 76.7% | 80.0% | ▲ 4.3% |
| July | 32.3% | 61.3% | ▲ 90.0% |
| August | 52.6% | – | – |
| September | – | – | – |
| October | 100.0% | – | in progress |
| November | – | – | – |
| December | 73.3% | – | – |
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 periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | – | – | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | – | – | – |
| 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 100.0% 381
- Cancelled 0.0% 0
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SFO IAD San Francisco International Airport – Washington Dulles International Airport | 3,883 | 14.1 min | 72.4% | 228 |
| SAN RDU San Diego International Airport – Raleigh-Durham International Airport | 3,522 | 15.9 min | 69.2% | 52 |
| SAN ATL San Diego International Airport – Hartsfield Jackson Atlanta International Airport | 3,038 | 27.3 min | 66.7% | 36 |
| SJC HNL Mineta San Jose International Airport – Daniel K. Inouye International Airport | 3,886 | 10.9 min | 91.4% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 16 | 16 | 87.5% | 0 |
| November 2024 | 26 | 26 | 76.9% | 0 |
| December 2024 | 31 | 31 | 71.0% | 0 |
| January 2025 | 5 | 5 | 60.0% | 0 |
| March 2025 | 13 | 13 | 92.3% | 0 |
| April 2025 | 29 | 29 | 93.1% | 0 |
| May 2025 | 29 | 29 | 86.2% | 0 |
| June 2025 | 30 | 30 | 76.7% | 0 |
| July 2025 | 31 | 31 | 32.3% | 0 |
| August 2025 | 19 | 19 | 52.6% | 0 |
| October 2025 | 1 | 1 | 100.0% | 0 |
| December 2025 | 30 | 30 | 73.3% | 0 |
| January 2026 | 6 | 6 | 33.3% | 0 |
| March 2026 | 14 | 14 | 85.7% | 0 |
| April 2026 | 21 | 21 | 95.2% | 0 |
| May 2026 | 19 | 19 | 63.2% | 0 |
| June 2026 | 30 | 30 | 80.0% | 0 |
| July 2026 | 31 | 31 | 61.3% | 0 |