Flight Reliability
AS 645 · Alaska Airlines
Phoenix → Seattle (PHX–SEA)
90
Nerd Approved
WanderNerd Reliability Score
- 83%
- Arrive within 15 minutes
- 1 min
- Average arrival delay
- 0%
- Cancelled
- 6 min early
- Median arrival delay
Based on 339 historical flights. Data through May 2026.
What the data says
The 3–6 AM departure wins.
AS 645 departing between 3–6 AM arrived on time 95% of the time, versus 83% between 6–9 AM.
Tuesday comes out ahead.
A small edge: 86% on time on Tuesdays against 80% on Thursdays.
A bit ahead of the Alaska Airlines network.
AS 645 arrived on time 83% of the time, versus 80% across the Alaska Airlines network.
It basically never cancels.
Out of 339 scheduled flights, only 0.0% were cancelled.
The breakdown
- Mon82%(50 flights)
- Tue86%(50 flights)
- Wed82%(49 flights)
- Thu80%(49 flights)
- Fri83%(48 flights)
- Sat86%(42 flights)
- Sun86%(50 flights)
- 3–6 AM95%(21 flights)
- 6–9 AM83%(317 flights)
100%
May
Jun 73% → May 100% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 73% | 30 |
| July 2025 | 68% | 31 |
| August 2025 | 65% | 31 |
| September 2025 | 93% | 30 |
| October 2025 | 94% | 31 |
| November 2025 | 87% | 30 |
| December 2025 | 83% | 29 |
| January 2026 | 89% | 27 |
| February 2026 | 93% | 27 |
| March 2026 | 80% | 30 |
| April 2026 | 90% | 30 |
| May 2026 | 100% | 12 |
- Departures on time
- 89%
- Diverted
- 0.3%
- Flights flown
- 338
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 339 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.