Flight Reliability
AS 648 · Alaska Airlines
Seattle → Tucson (SEA–TUS)
88
Pretty Reliable
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 1 min
- Average arrival delay
- 0.3%
- Cancelled
- 4 min early
- Median arrival delay
Based on 359 historical flights. Data through May 2026.
What the data says
The 6–9 AM departure wins.
AS 648 departing between 6–9 AM arrived on time 92% of the time, versus 73% between 9 AM–12 PM.
Sunday scaries are real for this one.
AS 648 arrived on time 88% of the time on Wednesdays and just 72% on Sundays. That gap is worth planning around.
It basically never cancels.
Out of 359 scheduled flights, only 0.3% were cancelled.
Trending in the right direction.
AS 648 arrived on time 87% of the time over the last three months in the data, compared with 69% in the three months before that.
The breakdown
- Mon85%(52 flights)
- Tue80%(49 flights)
- Wed88%(49 flights)
- Thu83%(52 flights)
- Fri75%(51 flights)
- Sat85%(52 flights)
- Sun72%(53 flights)
- 6–9 AM92%(146 flights)
- 9 AM–12 PM73%(211 flights)
- 12–3 PM—(1 flights)
87%
May
Jun 80% → May 87% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 80% | 30 |
| July 2025 | 94% | 31 |
| August 2025 | 97% | 31 |
| September 2025 | 97% | 30 |
| October 2025 | 76% | 25 |
| November 2025 | 57% | 30 |
| December 2025 | 55% | 31 |
| January 2026 | 68% | 31 |
| February 2026 | 86% | 28 |
| March 2026 | 80% | 30 |
| April 2026 | 93% | 30 |
| May 2026 | 87% | 31 |
- Departures on time
- 79%
- Diverted
- 0%
- Flights flown
- 358
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 359 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.