Seattle (SEA) to Walla Walla (ALW) flights
Horizon Air flies nonstop from Seattle-Tacoma International Airport to Walla Walla Regional Airport, with about 14 flights a week in July 2026. The 213-mile flight takes about 58m gate to gate.
- Distance
- 213 mi · 343 km
- Flight time
- 58m
- Airlines
- 1
- Seats filled
- 67%
Airlines flying SEA to ALW
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Horizon Air | 14 | Embraer E175 | 36,379 | 58m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SEA to ALW flight schedule
3 flight numbers flew this route in August 2026, 1 of them almost daily. The first usually leaves at 12:01pm and the last at 10:50pm. 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 2120Alaska Airlines · operated by Horizon Air | 12:01pm | 1:09pm | 13 | 69% |
| AS 2115Alaska Airlines · operated by Horizon Air | 1:39pm | 2:42pm | 18 | 81% |
| AS 2245Alaska Airlines · operated by Horizon Air | 10:50pm | 11:53pm | 31 | 93% |
Is SEA to ALW on time?
From September 2025 to August 2026, 87% of 729 flights arrived within 15 minutes of schedule and 2.1% were cancelled. Flights leaving around 10pm were the most punctual (94%), those around 1pm the least (74%). Most delay time was caused by late-arriving aircraft (49%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 729 | 87% | 6 min | 2.1% |
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 |
|---|---|---|---|
| 11am to 12pm | 55 | 89% | |
| 12pm to 1pm | 44 | 77% | |
| 1pm to 2pm | 183 | 74% | |
| 2pm to 3pm | 82 | 90% | |
| 10pm to 11pm | 173 | 94% | |
| 11pm to 12am | 191 | 93% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 60 | 3,251 | |
| September 2025 | 60 | 3,035 | |
| October 2025 | 61 | 3,282 | |
| November 2025 | 56 | 2,940 | |
| December 2025 | 57 | 2,859 | |
| January 2026 | 59 | 2,796 | |
| February 2026 | 55 | 2,513 | |
| March 2026 | 61 | 3,241 | |
| April 2026 | 60 | 3,054 | |
| May 2026 | 61 | 3,152 | |
| June 2026 | 60 | 3,258 | |
| July 2026 | 62 | 2,998 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.