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

Return flights

24 Dec - 07 Jan	jetBlue
23 Dec - 07 Jan	jetBlue
18 Dec - 22 Dec	jetBlue
22 Dec - 08 Jan	jetBlue
23 Dec - 29 Dec	jetBlue
25 Dec - 30 Dec	Delta
24 Dec - 31 Dec	jetBlue
23 Dec - 27 Dec	jetBlue
23 Dec - 30 Dec	jetBlue
30 Dec - 04 Jan	jetBlue
25 Dec - 01 Jan	Delta
20 Dec - 09 Jan	jetBlue
20 Dec - 05 Jan	jetBlue
21 Dec - 10 Jan	jetBlue
20 Dec - 28 Dec	jetBlue
22 Dec - 30 Dec	jetBlue
27 Dec - 01 Jan	jetBlue
27 Dec - 04 Jan	jetBlue

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

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 December from $606

Return flights