Cheap flights from Seattle to La Asuncion from CA $187

View CA $187 flight on Sun, Nov. 9, 2025Opens in a new window

Popular airlines from Seattle to La Asuncion

  • Alaska Airlines

    Alaska Airlines

  • American Airlines

    American Airlines

  • Aeromexico

    Aeromexico

  • Air Canada

    Air Canada

  • United

    United

  • Delta

    Delta

  • Copa

    Copa

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Cheap flights from Seattle (SEA) to La Asuncion (SJO)

Prices were available within the past 7 days and start at CA $187 for one-way flights and CA $421 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, Sep. 27 - Thu, Oct. 16
PAE
Seattle
SJO
San José
CA $421 Roundtrip, found 3 days ago
CA $421
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sat, Sep. 27 from Seattle to San José, returning Thu, Oct. 16, priced at CA $421 found 3 days ago
Alaska Airlines
Sat, Sep. 27 - Sat, Oct. 11
PAE
Seattle
SJO
San José
CA $463 Roundtrip, found 3 days ago
CA $463
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sat, Sep. 27 from Seattle to San José, returning Sat, Oct. 11, priced at CA $463 found 3 days ago
American Airlines
Wed, Nov. 5 - Wed, Nov. 19
SEA
Seattle
SJO
San José
CA $549 Roundtrip, found 2 days ago
CA $549
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Nov. 5 from Seattle to San José, returning Wed, Nov. 19, priced at CA $549 found 2 days ago
Delta
Tue, Nov. 4 - Tue, Nov. 18
SEA
Seattle
SJO
San José
CA $549 Roundtrip, found 2 days ago
CA $549
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Nov. 4 from Seattle to San José, returning Tue, Nov. 18, priced at CA $549 found 2 days ago
JetBlue Airways
Thu, Sep. 18 - Thu, Oct. 2
SEA
Seattle
SJO
San José
CA $649 Roundtrip, found 17 hours ago
CA $649
Roundtrip
found 17 hours ago
Select JetBlue Airways flight, departing Thu, Sep. 18 from Seattle to San José, returning Thu, Oct. 2, priced at CA $649 found 17 hours ago
United
Sun, Aug. 17 - Tue, Aug. 26
SEA
Seattle
SJO
San José
CA $710 Roundtrip, found 14 hours ago
CA $710
Roundtrip
found 14 hours ago
Select United flight, departing Sun, Aug. 17 from Seattle to San José, returning Tue, Aug. 26, priced at CA $710 found 14 hours ago

Find the cheapest month to fly from Seattle (SEA) to San José (SJO)

September is typically the cheapest month to fly

From CA $445 - CA $797 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.