Flights to La Asuncion from Seattle - ￥23,230

View ￥23,230 flight on Tue, Sep 9, 2025Opens in a new window

Popular airlines from Seattle to La Asuncion

  • American Airlines

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  • United

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  • Aeromexico

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Cheap Flights from Seattle to La Asuncion (SEA-SJO)

Prices were available within the past 7 days and start at ￥23,230 for one-way flights and ￥51,100 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, Sep 9 - Mon, Sep 15
SEA
Seattle
SJO
San José
￥51,100 Roundtrip, found 6 days ago
￥51,100
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Tue, Sep 9 from Seattle to San José, returning Mon, Sep 15, priced at ￥51,100 found 6 days ago
Alaska Airlines
Tue, Sep 9 - Sat, Sep 20
SEA
Seattle
SJO
San José
￥56,800 Roundtrip, found 6 days ago
￥56,800
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Tue, Sep 9 from Seattle to San José, returning Sat, Sep 20, priced at ￥56,800 found 6 days ago
Delta
Mon, Sep 8 - Tue, Sep 16
SEA
Seattle
SJO
San José
￥59,150 Roundtrip, found 6 days ago
￥59,150
Roundtrip
found 6 days ago
Select Delta flight, departing Mon, Sep 8 from Seattle to San José, returning Tue, Sep 16, priced at ￥59,150 found 6 days ago
avianca
Sun, Sep 7 - Mon, Sep 15
SEA
Seattle
SJO
San José
￥62,800 Roundtrip, found 6 days ago
￥62,800
Roundtrip
found 6 days ago
Select avianca flight, departing Sun, Sep 7 from Seattle to San José, returning Mon, Sep 15, priced at ￥62,800 found 6 days ago
American Airlines
Mon, Sep 8 - Tue, Sep 16
SEA
Seattle
SJO
San José
￥64,950 Roundtrip, found 6 days ago
￥64,950
Roundtrip
found 6 days ago
Select American Airlines flight, departing Mon, Sep 8 from Seattle to San José, returning Tue, Sep 16, priced at ￥64,950 found 6 days ago
United
Mon, Sep 8 - Tue, Sep 16
SEA
Seattle
SJO
San José
￥67,950 Roundtrip, found 6 days ago
￥67,950
Roundtrip
found 6 days ago
Select United flight, departing Mon, Sep 8 from Seattle to San José, returning Tue, Sep 16, priced at ￥67,950 found 6 days ago

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

September is typically the cheapest month to fly

From ￥48,705 - ￥89,310 per traveler.

Graph displaying average flight prices per month

*Available to Expedia members.