| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Oct 23 | SEA | SJC | 13:59 | 15:37 |
Landed
|
Track > |
| Oct 22 | SEA | SJC | 14:06 | 15:47 |
Landed
|
Track > |
| Oct 21 | SEA | SJC | 12:44 | 14:41 |
Landed Late
|
Track > |
| Oct 20 | SEA | SJC | 14:28 | 16:20 |
Landed Late
|
Track > |
| Oct 19 | SEA | SJC | 13:56 | 15:51 |
Landed
|
Track > |
| Oct 18 | SEA | SJC | 14:24 | 16:16 |
Landed Late
|
Track > |
| Oct 17 | SEA | SJC | 14:01 | 15:54 |
Landed
|
Track > |
| Oct 16 | SEA | SJC | 13:51 | 15:39 |
Landed
|
Track > |
| Oct 15 | SEA | SJC | 13:58 | 15:36 |
Landed
|
Track > |
| Oct 14 | SEA | SJC | 12:13 | 13:48 |
Landed
|
Track > |
Alaska Airlines Flight AS521 connects Seattle, United States to San Jose, United States, taking off from Seattle Tacoma International Airport SEA and landing at San Jose International Airport SJC.
How long is the AS521 flight from Seattle to San Jose?
The average flight time from Seattle to San Jose is 1 hour and 46 minutes. The flight distance is 1122 km / 697 miles and the average flight speed is 633 km/h / 393 mph.
How many AS521 flights are operated per week?
6 flights per week. The flight AS521 is operated on Monday, Tuesday, Wednesday, Thursday, Friday and Sunday.
What is the On-Time Performance (OTP) of Alaska Airlines Flight AS521 Seattle to San Jose?
The Airportia On-Time Performance Rating for Alaska Airlines Flight AS521 is 4.9/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight AS521 arriving at?
Flight AS521 arrives at San Jose International Airport (SJC) Terminal B.
When was the latest AS521 flight?
The latest flight took off on Friday, October 23rd, 2026 with the flight status being Landed on 15:37.
How else can the flight AS521 be referenced as?
This Alaska Airlines flight can also be referenced as ASA521, AS0521, AS 521, ASA 521.
How often is flight AS521 delayed?
On average, 40% of all AS521 flights are delayed. The average delay is 19 minutes.
Can I get compensation for my delayed or cancelled AS521 flight or baggage issues?
If your AS521 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.
See our AS521 Flight Tracker above for more details.
Flight AS521 is code-shared by 1 airline using the flight number JL6310
Other flights departing from Seattle SEA: DL542, DL3748, DL942, DL142
Other flights arriving at San Jose SJC: WN1992, DL2136, WN2189, OO4969
All flights connecting Seattle SEA to San Jose SJC.