AirHint found the following cheapest return flights from Washington (DCA) to San Juan (SJU) in April 2026 (see full year).

Return flights

18 Apr - 21 Apr	Delta
20 Apr - 23 Apr	Delta
18 Apr - 25 Apr	Southwest Airlines
25 Apr - 30 Apr	Delta
27 Apr - 05 May	United
13 Apr - 18 Apr	United
14 Apr - 18 Apr	United
19 Apr - 24 Apr	jetBlue	direct
24 Apr - 18 May	Southwest Airlines
30 Apr - 09 May	Southwest Airlines
15 Apr - 22 Apr	United
29 Apr - 09 May	United
01 Apr - 08 Apr	jetBlue
18 Apr - 25 Apr	jetBlue	direct
30 Apr - 15 May	Southwest Airlines
30 Apr - 03 May	Southwest Airlines
23 Apr - 03 May	Southwest Airlines

Also check the deals for one-way flights from Washington to San Juan in April.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Washington to San Juan in April from 213€

Return flights