AirHint found the following cheapest return flights from Washington (IAD) to San Jose (SJO) in July 2025 (see full year).

Return flights

21 Jul - 28 Jul	Avianca
21 Jul - 29 Jul	Avianca
21 Jul - 26 Jul	Avianca
15 Jul - 18 Jul	Avianca
16 Jul - 20 Jul	Avianca
22 Jul - 29 Jul	Avianca	direct
20 Jul - 24 Jul	Avianca	direct
16 Jul - 21 Jul	Avianca	direct
22 Jul - 26 Jul	Avianca	direct
15 Jul - 29 Jul	Avianca	direct
29 Jul - 25 Aug	Avianca	direct
30 Jul - 14 Aug	Avianca	direct
30 Jul - 03 Aug	Avianca
29 Jul - 02 Aug	Avianca	direct
25 Jul - 02 Aug	Avianca	direct
30 Jul - 13 Aug	Avianca
30 Jul - 06 Aug	Avianca
31 Jul - 04 Aug	Volaris El Salvador
29 Jul - 12 Aug	Avianca

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

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 July from $132

Return flights