Cheapest return flights from Washington to San Jose in March from 342€

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

Return flights

20 Mar - 23 Mar Avianca
21 Mar - 31 Mar Avianca
24 Mar - 31 Mar Avianca
21 Mar - 23 Mar Avianca
31 Mar - 04 Apr Avianca
30 Mar - 07 Apr Allegiant Air
29 Mar - 03 Apr Allegiant Air
30 Mar - 04 Apr Breeze Airways
31 Mar - 05 Apr Avianca
25 Mar - 04 Apr Avianca
23 Mar - 28 Mar Avianca
22 Mar - 28 Mar Avianca
26 Mar - 03 Apr Frontier Airlines
22 Mar - 29 Mar United
26 Mar - 04 Apr Allegiant Air
27 Mar - 05 Apr Allegiant Air
28 Mar - 03 Apr Avianca
22 Mar - 29 Mar United direct
22 Mar - 28 Mar United direct
21 Mar - 22 Mar United direct

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

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