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

Return flights

03 Mar - 10 Mar	Delta
23 Mar - 27 Mar	jetBlue
02 Mar - 06 Mar	United
01 Mar - 06 Mar	United
04 Mar - 10 Mar	United
02 Mar - 07 Mar	United
23 Mar - 23 Mar	jetBlue
10 Mar - 14 Mar	United
04 Mar - 08 Mar	Southwest Airlines
05 Mar - 08 Mar	Southwest Airlines
31 Mar - 07 Apr	United
29 Mar - 03 Apr	Delta

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

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 March from 194€

Return flights