Cheapest return flights from Washington to San Jose in January from $233

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

Return flights

19 Jan - 24 Jan Avianca
10 Jan - 22 Jan Avianca direct
18 Jan - 22 Jan United
19 Jan - 24 Jan Avianca direct
08 Jan - 13 Jan American Airlines
09 Jan - 13 Jan American Airlines
08 Jan - 15 Jan American Airlines
09 Jan - 21 Jan Frontier Airlines
13 Jan - 20 Jan Avianca
08 Jan - 12 Jan American Airlines

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

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