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

Return flights

25 Apr - 28 Apr	United
23 Apr - 30 Apr	United
15 Apr - 27 Apr	Copa
15 Apr - 19 Apr	Copa
20 Apr - 23 Apr	Copa
25 Apr - 02 May	Copa
14 Apr - 26 Apr	Copa
15 Apr - 26 Apr	Copa
15 Apr - 25 Apr	Copa
09 Apr - 13 Apr	Copa
11 Apr - 18 Apr	Copa

Also check the deals for one-way flights from Washington to San Jose 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 Jose in April from 223€

Return flights