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

Return flights

26 Jan - 29 Jan	United
19 Jan - 26 Jan	United
26 Jan - 03 Feb	United
19 Jan - 24 Jan	United
24 Jan - 26 Jan	United
24 Jan - 07 Feb	United
20 Jan - 24 Jan	United
24 Jan - 27 Jan	United
31 Jan - 07 Feb	United
27 Jan - 31 Jan	United
19 Jan - 08 Feb	United
15 Jan - 22 Jan	Southwest Airlines
19 Jan - 27 Jan	Delta
20 Jan - 29 Jan	Southwest Airlines
23 Jan - 14 Feb	Southwest Airlines
24 Jan - 15 Feb	Delta

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

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 January from 202€

Return flights