Alaska Airlines Flight 3478 Deals & Information (2025/2026)

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Frequently asked questions

What route does flight number AS3478 take?
AS3478 flies direct from SJC to San Diego Intl. Airport (SAN). During this journey, you’ll be in the air for about 1 hour and 23 minutes. Book ahead to secure your preferred seat.
What terminal does AS3478 fly out of?
You’ll likely be departing from Terminal B if you’re traveling on flight number AS3478 direct from San Jose, CA Airport (SJC-Norman Y. Mineta San Jose Intl.) to SAN.
What kind of plane is on flight number AS3478?
The Embraer 175 is the plane that’s mostly used for flight number AS3478. This flight almost always departs from San Jose Intl. Airport and arrives at San Diego, CA Airport (SAN-San Diego Intl.).
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your AS3478 flight with Travelocity, please visit our Customer Service Portal.