Cheap flights from Boston to La Asuncion

View AU$385 flight on Tue, 6 Jan. 2026Opens in a new window

Popular airlines from Boston to La Asuncion

  • Jetstar

    Jetstar

  • Qantas Airways

    Qantas Airways

  • Virgin Australia

    Virgin Australia

  • Scoot

    Scoot

  • American Airlines

    American Airlines

  • Emirates

    Emirates

  • United

    United

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

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Tue, 5 Aug. - Tue, 26 Aug.
BOS
Boston
SJO
San José
AU$822 Return, found 4 hours ago
AU$822
Return
found 4 hours ago
Select JetBlue Airways flight, departing Tue, 5 Aug. from Boston to San José, returning Tue, 26 Aug., priced at AU$822 found 4 hours ago
JetBlue Airways
Tue, 5 Aug. - Tue, 26 Aug.
BOS
Boston
SJO
San José
AU$831 Return, found 4 hours ago
AU$831
Return
found 4 hours ago
Select JetBlue Airways flight, departing Tue, 5 Aug. from Boston to San José, returning Tue, 26 Aug., priced at AU$831 found 4 hours ago
JetBlue Airways
Tue, 5 Aug. - Tue, 26 Aug.
BOS
Boston
SJO
San José
AU$833 Return, found 4 hours ago
AU$833
Return
found 4 hours ago
Select JetBlue Airways flight, departing Tue, 5 Aug. from Boston to San José, returning Tue, 26 Aug., priced at AU$833 found 4 hours ago
United
Tue, 5 Aug. - Tue, 26 Aug.
BOS
Boston
SJO
San José
AU$885 Return, found 4 hours ago
AU$885
Return
found 4 hours ago
Select United flight, departing Tue, 5 Aug. from Boston to San José, returning Tue, 26 Aug., priced at AU$885 found 4 hours ago
Copa
Tue, 5 Aug. - Tue, 26 Aug.
BOS
Boston
SJO
San José
AU$985 Return, found 4 hours ago
AU$985
Return
found 4 hours ago
Select Copa flight, departing Tue, 5 Aug. from Boston to San José, returning Tue, 26 Aug., priced at AU$985 found 4 hours ago
American Airlines
Tue, 5 Aug. - Tue, 26 Aug.
BOS
Boston
SJO
San José
AU$1,002 Return, found 4 hours ago
AU$1,002
Return
found 4 hours ago
Select American Airlines flight, departing Tue, 5 Aug. from Boston to San José, returning Tue, 26 Aug., priced at AU$1,002 found 4 hours ago

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

February is typically the cheapest month to fly

From AU$363 - AU$831 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.