Cheapest return flights from Washington to San Jose in March from $251

AirHint found the following cheapest return flights from Washington (IAD) to San Jose (SJO) in March 2026 (see full year).

Return flights

14 Mar - 18 Mar Volaris El Salvador
08 Mar - 15 Mar Avianca
11 Mar - 28 Mar Volaris El Salvador
15 Mar - 06 Apr Volaris El Salvador
21 Mar - 12 Apr Copa
23 Mar - 14 Apr Copa
16 Mar - 21 Mar Avianca
17 Mar - 21 Mar Volaris El Salvador
13 Mar - 19 Mar Avianca
13 Mar - 16 Mar Avianca
29 Mar - 04 Apr Volaris El Salvador
08 Mar - 15 Mar United direct

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

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