Alaska Airlines
AS521Seattle to San Jose
Alaska Airlines flight AS521 flies from Seattle Tacoma (SEA) to San Jose (SJC), 1,122 km. Over August 2025 to July 2026 it usually arrives about 5 minutes late: 79% of 281 flights arrived within 15 minutes of schedule and 1.1% were cancelled (US Department of Transportation data).
On-time record, last 12 months
79%
on time (within 15 min)
12%
more than 30 min late
1.1%
cancelled
+5 min
average arrival vs schedule
Every operation of AS521, August 2025 to July 2026: 281 flights. Source: US Bureau of Transportation Statistics, public domain.
Routes flown as AS521
- Seattle Tacoma (SEA) to San Jose (SJC)184 flights
- San Jose (SJC) to Seattle Tacoma (SEA)52 flights
- Nashville (BNA) to Seattle Tacoma (SEA)45 flights
Other flights from Seattle to San Jose
More about Seattle Tacoma (SEA) and San Jose (SJC).
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