Flights to La Asuncion from Boston - ￥29,830

View ￥29,830 flight on Thu, Oct 16, 2025Opens in a new window

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Cheap Flights from Boston to La Asuncion (BOS-SJO)

Prices were available within the past 7 days and start at ￥29,830 for one-way flights and ￥75,190 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Mar 2 - Sun, Mar 8
BOS
Boston
SJO
San José
￥75,190 Roundtrip, found 2 days ago
￥75,190
Roundtrip
found 2 days ago
Select United flight, departing Mon, Mar 2 from Boston to San José, returning Sun, Mar 8, priced at ￥75,190 found 2 days ago
United
Mon, Mar 2 - Sun, Mar 8
BOS
Boston
SJO
San José
￥76,010 Roundtrip, found 2 days ago
￥76,010
Roundtrip
found 2 days ago
Select United flight, departing Mon, Mar 2 from Boston to San José, returning Sun, Mar 8, priced at ￥76,010 found 2 days ago
Copa
Mon, Mar 2 - Sun, Mar 8
BOS
Boston
SJO
San José
￥77,700 Roundtrip, found 2 days ago
￥77,700
Roundtrip
found 2 days ago
Select Copa flight, departing Mon, Mar 2 from Boston to San José, returning Sun, Mar 8, priced at ￥77,700 found 2 days ago
Delta
Mon, Mar 2 - Sun, Mar 8
BOS
Boston
SJO
San José
￥81,170 Roundtrip, found 2 days ago
￥81,170
Roundtrip
found 2 days ago
Select Delta flight, departing Mon, Mar 2 from Boston to San José, returning Sun, Mar 8, priced at ￥81,170 found 2 days ago
avianca
Mon, Mar 2 - Sun, Mar 8
BOS
Boston
SJO
San José
￥83,390 Roundtrip, found 2 days ago
￥83,390
Roundtrip
found 2 days ago
Select avianca flight, departing Mon, Mar 2 from Boston to San José, returning Sun, Mar 8, priced at ￥83,390 found 2 days ago
American Airlines
Fri, Feb 13 - Mon, Feb 16
BOS
Boston
SJO
San José
￥141,470 Roundtrip, found 11 hours ago
￥141,470
Roundtrip
found 11 hours ago
Select American Airlines flight, departing Fri, Feb 13 from Boston to San José, returning Mon, Feb 16, priced at ￥141,470 found 11 hours ago

Find the cheapest month to fly from Boston (BOS) to San José (SJO)

February is typically the cheapest month to fly

From ￥34,663 - ￥79,310 per traveler.

Graph displaying average flight prices per month

*Available to Expedia members.