Route · SEA → ALW · 2020–2025 BTS data
Seattle to Walla Walla
The SEA–ALW corridor (Seattle, WA → Walla Walla, WA) runs ahead of the national average, served by 2 carriers across roughly 213 miles.
Data updated 2026-06-13
- 87.3%
- On-time
- +8.3 pts
- vs US avg
- 55 min
- Delay when late
- 2,216
- Flights
Cancelled
3.1%
Best Month
Nov 2023 97%
Worst Month
Sep 2024 64%
Distance
213 mi
Carriers
2
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Sep 2024 | 59 | 21 | 0 | 0 | OO |
| Aug 2024 | 62 | 21 | 1 | 0 | OO |
| Jul 2024 | 60 | 14 | 0 | 0 | OO |
| Jun 2024 | 60 | 10 | 1 | 0 | OO |
| May 2024 | 60 | 6 | 0 | 0 | OO |
| Apr 2024 | 60 | 4 | 0 | 0 | OO |
| Mar 2024 | 62 | 4 | 0 | 0 | OO |
| Feb 2024 | 58 | 3 | 3 | 0 | OO |
| Jan 2024 | 62 | 10 | 12 | 0 | OO |
| Dec 2023 | 62 | 8 | 11 | 2 | OO |
| Nov 2023 | 59 | 2 | 3 | 1 | OO |
| Oct 2023 | 62 | 6 | 1 | 0 | OO |
| Sep 2023 | 55 | 5 | 0 | 0 | OO |
| Aug 2023 | 31 | 4 | 0 | 0 | OO |
| Jul 2023 | 31 | 2 | 0 | 0 | OO |
| Jun 2023 | 30 | 5 | 0 | 0 | OO |
| Dec 2022 | 31 | 5 | 4 | 0 | QX |
| Oct 2022 | 31 | 1 | 0 | 0 | QX |
| Sep 2022 | 36 | 2 | 0 | 0 | QX |
| Aug 2022 | 62 | 10 | 1 | 0 | QX |
| Jul 2022 | 62 | 5 | 1 | 0 | QX |
| Jun 2022 | 60 | 12 | 0 | 0 | QX |
| May 2022 | 62 | 6 | 1 | 0 | QX |
| Apr 2022 | 60 | 8 | 1 | 0 | QX |
Cancellation Rate
3.1%
40 of 1,277 flights
Diversion Rate
0.2%
3 of 1,277 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
Origin airport →ALW - Walla Walla
Full on-time, delay-cause, and seasonal performance for Walla Walla, WA.
Destination airport →Compare the two airports
See SEA and ALW side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to SEA–ALW.
Routes with a similar on-time rate
What the Data Says About SEA to ALW
Seattle to Walla Walla (SEA to ALW) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.3% on-time rate across 2,216 flights, with delays that do happen averaging 54.9 minutes. The corridor runs roughly 213 miles and is served by 2 carriers. Over the most recent 24 months, 40 of 1,277 flights were cancelled (3.1%) and 3 diverted (0.2%).
The monthly split is wide on this route: Nov 2023 posted the strongest performance at 97% on-time, while Sep 2024 came in at just 64% - a 32-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from SEA to ALW? ▼
What is the cancellation rate for SEA to ALW? ▼
How far is the flight from SEA to ALW? ▼
When is the best time to fly from SEA to ALW? ▼
Flight Guides
Tips and data-driven advice for choosing reliable routes.
Explore PlainFlights
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.