Cheap Flights from Seattle to San Jose from $218

Frequently Asked Questions

• What are the cheapest flights from Seattle to San Jose (SEA-SJO)?

  Based on Trip.com data, Alaska Airlines offers one-way fares as low as $218 on Cheapest nonstop routes (e.g. SEA to SJO on Sun, Oct 18), while avianca offers Cheapest nonstop round-trips from $588 departing on Thu, Oct 29 and returning on Thu, Nov 5.

• Which airlines offer flights from Seattle to San Jose?

  At the moment, several airlines serve connecting flights from Seattle to San Jose, including: Aeromexico Selected airlines are based on historical data collected from flight bookings made by users on Trip.com within the last 90 days.

• When is the best time to book flights from Seattle to San Jose?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seattle to San Jose is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How can I find the best deals on flights from Seattle to San Jose?

  To find best deals on flights from Seattle to San Jose, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sun, Oct 18, with one-way flights priced at just $218.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Alaska Airlines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for San Jose travel is around January.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Seattle (SEA) to San Jose (SJO) the cheapest?

  The cheapest months to fly from Seattle to San Jose is October, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Seattle to San Jose on?

  After crunching the numbers on our October flight calendar, it's currently cheapest to fly from Seattle to San Jose on October 15, 2026 with American Airlines, with prices starting at $585.

• Which airports can I fly into San Jose from Seattle?

  You can arrive at any of the following airports in San Jose: Juan Santamaría International Airport (SJO), and Tobias Bolaños International Airport (SYQ). Flights from Seattle-Tacoma International Airport to Juan Santamaría International Airport (SEA-SJO) are by far the most popular option for this route.

• Is there any time difference between Seattle and San Jose?

  The time difference between San Jose and Seattle is 2h.

• How do I change or cancel my ticket from Seattle to San Jose?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average cost of a one-way flight from Seattle to San Jose?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Seattle to San Jose is $493. Fares vary by travel date, airline and availability.

• How do I book flights from Seattle to San Jose on Trip.com?

  Enter Seattle and San Jose, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.