Airport · ALW · Walla Walla, Washington
Walla Walla, WA
Walla Walla, WA posts top-10% on-time performance among the 382 tracked U.S. airports, as a smaller regional airport. According to the U.S. DOT Bureau of Transportation Statistics, drawn from 4,519 flights (2020–2025); its biggest delay driver is late aircraft.
Data updated 2026-06-13
- 88.8%
- On-time
- Top 7%
- on-time, US airports
- 62 min
- Delay when late
- 1.68%
- Cancelled
Key Performance Metrics
Total Flights
4,519
Best Month
Apr 97.8%
Worst Month
Dec 92.6%
Delayed
504
Cancelled
76
ALW on-time rate vs. the national average
Ahead of the U.S. average across all 382 tracked airports.
Where ALW sits among all 382 tracked airports
ALW's 88.8% on-time rate falls in the 85-90% band, the 116-airport band it shares.
National on-time-rate distribution
- 60-65% 1
1 airport between 60% and 65% on-time
1 airports
- 65-70% 4
4 airports between 65% and 70% on-time
4 airports
- 70-75% 9
9 airports between 70% and 75% on-time
9 airports
- 75-80% 48
48 airports between 75% and 80% on-time
48 airports
- 80-85%
192 airports between 80% and 85% on-time
192 airports
- 85-90%
116 airports between 85% and 90% on-time
116 airports
- 90-95% 12
12 airports between 90% and 95% on-time
12 airports
What this shows ALW is marked in the 85-90% band.
Delay Cause Breakdown
Top delay cause: Late Aircraft. Total delay minutes: 15,266.
ALW - seasonal on-time pattern
Best: April (97.8%) · worst: December (92.6%)
Seasonal Performance Patterns
Monthly averages across all years of data. Best month: April (97.8% on-time). Most delays: December (92.6% on-time).
| Month | Avg Flights | Avg Delayed | Avg Cancelled | On-Time % |
|---|---|---|---|---|
| December | 103 | 15 | 6 | 92.6% |
| November | 95 | 8 | 2 | 95.8% |
| October | 99 | 8 | 1 | 95.6% |
| September | 112 | 14 | 0 | 94.9% |
| August | 109 | 18 | 1 | 94.5% |
| July | 108 | 14 | 0 | 94.2% |
| June | 113 | 16 | 0 | 94.2% |
| May | 105 | 8 | 0 | 96.7% |
| April | 120 | 8 | 1 | 97.8% |
| March | 124 | 7 | 1 | 97% |
| February | 113 | 13 | 4 | 95% |
| January | 124 | 16 | 9 | 93.5% |
Year-Over-Year Performance
Annual flight volume and on-time trends at ALW.
ALW - on-time rate by year
2021–2024, year-over-year trend.
| Year | Flights | Delayed | Cancelled | On-Time % |
|---|---|---|---|---|
| 2024 | 1,087 | 49 | 18 | 95.5% |
| 2023 | 687 | 34 | 13 | 95.1% |
| 2022 | 1,227 | 57 | 24 | 95.4% |
| 2021 | 1,518 | 80 | 21 | 94.7% |
Cancellation & Diversion Analysis
Flight disruption statistics for Walla Walla, WA.
Cancellation Rate
1.68%
76 of 4,519 flights
Diversion Rate
0.04%
2 of 4,519 flights
Delay Rate
11.2%
504 of 4,519 flights
Monthly Performance
Recent 24 months of flight data.
| Period | Flights | Dep Delayed | Arr Delayed | Cancelled | Diverted |
|---|---|---|---|---|---|
| Sep 2024 | 119 | 8 | 21 | 0 | 0 |
| Aug 2024 | 124 | 8 | 21 | 1 | 0 |
| Jul 2024 | 120 | 10 | 14 | 0 | 0 |
| Jun 2024 | 120 | 7 | 10 | 1 | 0 |
| May 2024 | 120 | 3 | 6 | 0 | 0 |
| Apr 2024 | 120 | 1 | 4 | 0 | 0 |
| Mar 2024 | 124 | 2 | 4 | 0 | 0 |
| Feb 2024 | 116 | 3 | 3 | 3 | 0 |
| Jan 2024 | 124 | 7 | 10 | 13 | 0 |
| Dec 2023 | 124 | 8 | 8 | 9 | 0 |
| Nov 2023 | 118 | 3 | 2 | 3 | 1 |
| Oct 2023 | 124 | 7 | 6 | 1 | 0 |
| Sep 2023 | 109 | 4 | 5 | 0 | 0 |
| Aug 2023 | 62 | 5 | 4 | 0 | 0 |
| Jul 2023 | 62 | 3 | 2 | 0 | 0 |
| Jun 2023 | 60 | 4 | 5 | 0 | 0 |
| May 2023 | 28 | 0 | 0 | 0 | 0 |
| Dec 2022 | 62 | 7 | 5 | 4 | 0 |
| Nov 2022 | 58 | 3 | 3 | 1 | 0 |
| Oct 2022 | 62 | 2 | 1 | 0 | 0 |
| Sep 2022 | 73 | 2 | 2 | 0 | 0 |
| Aug 2022 | 124 | 3 | 10 | 2 | 0 |
| Jul 2022 | 124 | 3 | 5 | 0 | 0 |
| Jun 2022 | 120 | 7 | 12 | 0 | 0 |
Top Routes from ALW
Busiest routes to and from Walla Walla, WA.
| Route | Flights | On-Time | Distance |
|---|---|---|---|
| ALW (Walla Walla) → SEA (Seattle) | 2,217 | 88.5% | 213 mi |
| SEA (Seattle) → ALW (Walla Walla) | 2,216 | 87.3% | 213 mi |
Airports With a Similar On-Time Rate
Other U.S. airports nationwide whose on-time rate is closest to Walla Walla, WA's 88.8%.
Other Airports in Washington
Compare performance with other Washington airports.
Seattle, WA
Seattle · 1,871,155 flights
Spokane, WA
Spokane · 205,595 flights
Pasco/Kennewick/Richland, WA
Pasco/Kennewick/Richland · 63,750 flights
Bellingham, WA
Bellingham · 29,229 flights
Everett, WA
Everett · 19,411 flights
Pullman, WA
Pullman · 4,696 flights
Wenatchee, WA
Wenatchee · 2,841 flights
Yakima, WA
Yakima · 2,733 flights
Keep exploring
More flight data around Walla Walla, WA.
Washington flight data
Statewide on-time and delay aggregates, plus every reporting airport in Washington.
View WA data →Airport rankings
See where ALW sits among U.S. airports on on-time rate and average delay.
Best on-time airports →Compare airports
Put ALW head-to-head with another airport on delays and reliability.
Open comparison tool →What the Data Says About ALW
Walla Walla, WA in Walla Walla, Washington handled 4,519 flights in the Bureau of Transportation Statistics dataset between 2021 and 2024, posting a 88.8% on-time departure rate. Of those flights, 504 experienced delays, 76 were cancelled, and 2 were diverted. The cancellation rate works out to 1.68%, the diversion rate to 0.04%, and the average delay when departures run late is 62.1 minutes. These figures are the baseline for comparing ALW against other airports in the same state and nationally.
Breaking down what drives delays at ALW, Late Aircraft leads the pack. Late Aircraft accounts for 50.8% of total delay minutes, followed by Carrier at 24.5% and NAS (National Aviation System) at 14.1%. Weather contributes 10.6% of delay minutes at this airport, while security holds the smallest share at 0.0%. Travelers often overestimate the weather share; the BTS categorization shows late-arriving aircraft and carrier operations as the larger contributors.
Seasonally, April runs the cleanest at ALW with a 97.8% on-time rate, while December is the roughest at 92.6% - a 5-point swing between best and worst month. Volume peaks in March, when average flights hit 124. The busiest route connecting ALW is to SEA (Seattle), with 2,217 flights at a 88.5% on-time rate. Combine these numbers - 88.8% on-time, 62.1-minute average delay, 1.68% cancellation rate, and you have a concrete picture of departure reliability at Walla Walla, WA.
Frequently Asked Questions
What is the on-time performance rate at Walla Walla, WA (ALW)? ▼
What is the most common cause of delays at ALW? ▼
What is the average delay time at ALW? ▼
What is the best month to fly from ALW? ▼
What is the worst month for delays at ALW? ▼
How many routes operate from ALW? ▼
What is the cancellation rate at ALW? ▼
Flight Guides
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Using ALW's data
An airport-level on-time rate is a starting point, not a guarantee for your specific flight.
- Check the busiest route from ALW before you book a connection. See top routes
- Travel in April rather than December if your dates are flexible. Seasonal patterns
- Scores vary by airline and route within the same airport; check the specific carrier you're flying. Browse airlines
On-time rate reflects the BTS historical average across all reporting carriers at this airport, not any single flight or airline.
Related
Source: U.S. Bureau of Transportation Statistics (BTS) Airline on-time performance and operational reliability · 2025
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. Airport figures are computed directly from BTS On-Time Performance data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.