Alaska Airlines Flights from Seattle to San Jose, CR

Lowest fares from Seattle to San Jose, CR

Aug 2026
From$278*
Seen: 22 hours ago
Flight Type One Way|Saver
Sep 2026
From$283*
Seen: 15 hours ago
Flight Type One Way|Saver
Oct 2026
From$278*
Seen: 22 hours ago
Flight Type One Way|Saver
cmp-daily-histogram-bars-legend-min-price-aria-label $278
cmp-daily-histogram-bars-legend-max-price-aria-label $935
Displaying fares for August-2026
  • SEA–SJO, Aug 9, 2026: From $354
    09

    Su

    AUG

  • SEA–SJO, Aug 10, 2026: From $349
    10

    Mo

  • SEA–SJO, Aug 11, 2026: From $349
    11

    Tu

  • SEA–SJO, Aug 12, 2026: From $304
    12

    We

  • SEA–SJO, Aug 13, 2026: From $289
    13

    Th

  • SEA–SJO, Aug 14, 2026: From $294
    14

    Fr

  • SEA–SJO, Aug 15, 2026: From $293
    15

    Sa

  • SEA–SJO, Aug 16, 2026: From $354
    16

    Su

  • SEA–SJO, Aug 17, 2026: From $278
    17

    Mo

  • SEA–SJO, Aug 18, 2026: From $644
    18

    Tu

  • SEA–SJO, Aug 19, 2026: From $376
    19

    We

  • SEA–SJO, Aug 20, 2026: From $354
    20

    Th

  • SEA–SJO, Aug 21, 2026: From $418
    21

    Fr

  • SEA–SJO, Aug 22, 2026: From $676
    22

    Sa

  • SEA–SJO: cmp-view-offers-disclaimer. Find Offers
    23

    Su

  • SEA–SJO: cmp-view-offers-disclaimer. Find Offers
    24

    Mo

  • SEA–SJO, Aug 25, 2026: From $793
    25

    Tu

  • SEA–SJO, Aug 26, 2026: From $709
    26

    We

  • SEA–SJO, Aug 27, 2026: From $648
    27

    Th

  • SEA–SJO, Aug 28, 2026: From $513
    28

    Fr

  • SEA–SJO, Aug 29, 2026: From $799
    29

    Sa

  • SEA–SJO: cmp-view-offers-disclaimer. Find Offers
    30

    Su

  • SEA–SJO: cmp-view-offers-disclaimer. Find Offers
    31

    Mo

  • SEA–SJO, Sep 1, 2026: From $935
    01

    Tu

    SEP

  • SEA–SJO, Sep 2, 2026: From $851
    02

    We

  • SEA–SJO, Sep 3, 2026: From $804
    03

    Th

  • SEA–SJO, Sep 4, 2026: From $804
    04

    Fr

  • SEA–SJO, Sep 5, 2026: From $851
    05

    Sa

  • SEA–SJO: cmp-view-offers-disclaimer. Find Offers
    06

    Su

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    07

    Mo

  • SEA–SJO, Sep 8, 2026: From $411
    08

    Tu

    • Range$278-$935

    *Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.

    One-way low-fare flights Seattle to San Jose, CR.*

    $
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    One-way low-fare flights Seattle to San Jose, CR.*
    From
    To
    Fare Type
    Dates
    Price
    Seattle (SEA)San Jose, CR (SJO)One-way
    |
    Saver    		Depart: Aug 17, 2026

    From

    $278

    Seen: 22 hours ago

    Seattle (SEA)San Jose, CR (SJO)One-way
    |
    Saver    		Depart: Oct 4, 2026

    From

    $278

    Seen: 22 hours ago

    Seattle (SEA)San Jose, CR (SJO)One-way
    |
    Saver    		Depart: Aug 13, 2026

    From

    $289

    Seen: 22 hours ago

    Seattle (SEA)San Jose, CR (SJO)One-way
    |
    Saver    		Depart: Oct 3, 2026

    From

    $293

    Seen: 22 hours ago

    Seattle (SEA)San Jose, CR (SJO)One-way
    |
    Saver    		Depart: Aug 15, 2026

    From

    $293

    Seen: 22 hours ago

    Seattle (SEA)San Jose, CR (SJO)One-way
    |
    Saver    		Depart: Sep 9, 2026

    From

    $304

    Seen: 22 hours ago

    Seattle (SEA)San Jose, CR (SJO)One-way
    |
    Saver    		Depart: Sep 10, 2026

    From

    $283

    Seen: 15 hours ago

    Seattle (SEA)San Jose, CR (SJO)One-way
    |
    Saver    		Depart: Aug 14, 2026

    From

    $294

    Seen: 4 hours ago

    *Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.

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