Cheap flights from Washington to La Asuncion

View AU$189 flight on Mon, 23 Mar. 2026Opens in a new window

Popular airlines from Washington 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 Washington (WAS) 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.

American Airlines
Mon, 28 Jul. - Tue, 29 Jul.
BWI
Baltimore
SJO
San José
AU$471 Return, found 4 days ago
AU$471
Return
found 4 days ago
Select American Airlines flight, departing Mon, 28 Jul. from Baltimore to San José, returning Tue, 29 Jul., priced at AU$471 found 4 days ago
American Airlines
Sun, 3 Aug. - Thu, 7 Aug.
BWI
Baltimore
SJO
San José
AU$474 Return, found 2 days ago
AU$474
Return
found 2 days ago
Select American Airlines flight, departing Sun, 3 Aug. from Baltimore to San José, returning Thu, 7 Aug., priced at AU$474 found 2 days ago
United
Mon, 28 Jul. - Tue, 29 Jul.
DCA
Washington
SJO
San José
AU$529 Return, found 4 days ago
AU$529
Return
found 4 days ago
Select United flight, departing Mon, 28 Jul. from Washington to San José, returning Tue, 29 Jul., priced at AU$529 found 4 days ago
Delta
Mon, 23 Mar. - Thu, 2 Apr.
IAD
Washington
SJO
San José
AU$534 Return, found 3 days ago
AU$534
Return
found 3 days ago
Select Delta flight, departing Mon, 23 Mar. from Washington to San José, returning Thu, 2 Apr., priced at AU$534 found 3 days ago
Copa
Tue, 29 Jul. - Sun, 3 Aug.
IAD
Washington
SJO
San José
AU$541 Return, found 3 days ago
AU$541
Return
found 3 days ago
Select Copa flight, departing Tue, 29 Jul. from Washington to San José, returning Sun, 3 Aug., priced at AU$541 found 3 days ago
avianca
Tue, 29 Jul. - Sun, 3 Aug.
IAD
Washington
SJO
San José
AU$576 Return, found 3 days ago
AU$576
Return
found 3 days ago
Select avianca flight, departing Tue, 29 Jul. from Washington to San José, returning Sun, 3 Aug., priced at AU$576 found 3 days ago

Find the cheapest month to fly from Washington (WAS) to San José (SJO)

October is typically the cheapest month to fly

From AU$348 - AU$516 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.