Flight Reliability
AS 1 · Alaska Airlines
Washington → Seattle (DCA–SEA)
84
Pretty Reliable
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 1 min early
- Average arrival delay
- 1.1%
- Cancelled
- 8 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
AS 1 arrived on time 88% of the time on Mondays. On Fridays: 75%.
Better than the DCA–SEA route average.
AS 1 arrived on time 81% of the time, versus 74% across the DCA–SEA route.
Trending in the right direction.
AS 1 arrived on time 92% of the time over the last three months in the data, compared with 63% in the three months before that.
The breakdown
- Mon88%(51 flights)
- Tue77%(51 flights)
- Wed79%(52 flights)
- Thu81%(52 flights)
- Fri75%(51 flights)
- Sat86%(51 flights)
- Sun85%(52 flights)
97%
May
Jun 90% → May 97% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 90% | 30 |
| July 2025 | 68% | 31 |
| August 2025 | 90% | 31 |
| September 2025 | 90% | 30 |
| October 2025 | 84% | 31 |
| November 2025 | 90% | 30 |
| December 2025 | 42% | 31 |
| January 2026 | 71% | 28 |
| February 2026 | 75% | 28 |
| March 2026 | 79% | 29 |
| April 2026 | 100% | 30 |
| May 2026 | 97% | 31 |
- Departures on time
- 90%
- Diverted
- 0.3%
- Flights flown
- 360
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 365 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.