Cheap flights from Washington to Puerto Rico Island

View AU$165 flight on Mon, 1 Sep. 2025Opens in a new window

Popular airlines from Washington to Puerto Rico Island

  • American Airlines

    American Airlines

  • Delta

    Delta

  • United

    United

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Cheap Flights from Washington (WAS) to Puerto Rico Island (SJU)

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.

Delta
Sun, 21 Sep. - Thu, 25 Sep.
IAD
Washington
SJU
San Juan
AU$363 Return, found 2 days ago
AU$363
Return
found 2 days ago
Select Delta flight, departing Sun, 21 Sep. from Washington to San Juan, returning Thu, 25 Sep., priced at AU$363 found 2 days ago
Delta
Mon, 1 Sep. - Fri, 10 Oct.
DCA
Washington
SJU
San Juan
AU$381 Return, found 14 hours ago
AU$381
Return
found 14 hours ago
Select Delta flight, departing Mon, 1 Sep. from Washington to San Juan, returning Fri, 10 Oct., priced at AU$381 found 14 hours ago
United
Sun, 21 Sep. - Thu, 25 Sep.
IAD
Washington
SJU
San Juan
AU$395 Return, found 2 days ago
AU$395
Return
found 2 days ago
Select United flight, departing Sun, 21 Sep. from Washington to San Juan, returning Thu, 25 Sep., priced at AU$395 found 2 days ago
Delta
Mon, 1 Sep. - Fri, 10 Oct.
DCA
Washington
SJU
San Juan
AU$412 Return, found 14 hours ago
AU$412
Return
found 14 hours ago
Select Delta flight, departing Mon, 1 Sep. from Washington to San Juan, returning Fri, 10 Oct., priced at AU$412 found 14 hours ago
Delta
Sun, 21 Sep. - Thu, 25 Sep.
IAD
Washington
SJU
San Juan
AU$417 Return, found 2 days ago
AU$417
Return
found 2 days ago
Select Delta flight, departing Sun, 21 Sep. from Washington to San Juan, returning Thu, 25 Sep., priced at AU$417 found 2 days ago
American Airlines
Mon, 11 Aug. - Thu, 28 Aug.
DCA
Washington
SJU
San Juan
AU$562 Return, found 5 days ago
AU$562
Return
found 5 days ago
Select American Airlines flight, departing Mon, 11 Aug. from Washington to San Juan, returning Thu, 28 Aug., priced at AU$562 found 5 days ago

Find the cheapest month to fly from Washington (WAS) to San Juan (SJU)

May is typically the cheapest month to fly

From AU$147 - AU$536 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.