Walla Walla (ALW) to Seattle (SEA) flights
Horizon Air flies nonstop from Walla Walla Regional Airport to Seattle-Tacoma International Airport, with about 14 flights a week in July 2026. The 213-mile flight takes about 1h 6m gate to gate.
- Distance
- 213 mi · 343 km
- Flight time
- 1h 6m
- Airlines
- 1
- Seats filled
- 69%
Airlines flying ALW to SEA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Horizon Air | 14 | Embraer E175 | 37,191 | 1h 6m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
ALW to SEA flight schedule
2 flight numbers flew this route in August 2026, 2 of them almost daily. The first usually leaves at 5:13am and the last at 3:22pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| AS 2300Alaska Airlines · operated by Horizon Air | 5:13am | 6:20am | 31 | 98% |
| AS 2097Alaska Airlines · operated by Horizon Air | 3:22pm | 4:30pm | 31 | 82% |
Is ALW to SEA on time?
From September 2025 to August 2026, 91% of 729 flights arrived within 15 minutes of schedule and 2.3% were cancelled. Flights leaving around 5am were the most punctual (97%), those around 3pm the least (82%). Most delay time was caused by late-arriving aircraft (58%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 729 | 91% | 7 min | 2.3% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 5am to 6am | 365 | 97% | |
| 1pm to 2pm | 68 | 88% | |
| 2pm to 3pm | 51 | 82% | |
| 3pm to 4pm | 211 | 82% | |
| 4pm to 5pm | 34 | 97% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 60 | 2,960 | |
| September 2025 | 60 | 3,320 | |
| October 2025 | 61 | 3,473 | |
| November 2025 | 56 | 3,057 | |
| December 2025 | 57 | 3,303 | |
| January 2026 | 59 | 2,651 | |
| February 2026 | 56 | 2,623 | |
| March 2026 | 60 | 3,102 | |
| April 2026 | 60 | 2,995 | |
| May 2026 | 60 | 3,292 | |
| June 2026 | 60 | 3,404 | |
| July 2026 | 62 | 3,011 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.